Gammon Bulletin JAN_JUNE2015

8/19/2019 Gammon Bulletin JAN_JUNE2015

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Jan - June 2015Valume : 9401

“We will make electricity so cheap that only the rich will burn candles.”

[Vision of a great prolific inventor – Thomas Alva Edison (1847-1931) holding over 1000 US patents to his credit]


2/20

Wearepleasedto publish Jan- June, 2015issueofGammon Bulletin.

We take pleasure in presenting some of our recent significant

achievements, successes, learning and events from across the country to

our Gammon family, our esteemed customers and other beloved stake

holders.

The lead article in the Bulletin is on Design and Construction aspects of

Approach structures at Wazirabad which forms an important part of

India’s monumentalbridge across Yamuna river – the Signature Bridge at

Delhi. Keeping in view the beauty of Signature Bridge, approaches to this

bridge were conceived and designed to create overall aesthetically

pleasing structure. Authored by Mr. Arvind Singh, the article explains

how challenges arising due to various conflicting requirements in

congested locations were successfully met by creative construction-

friendly design ideas and innovative construction methodologies while

keeping an eye on cost-effectiveness and without compromising on

aesthetically pleasing attributes. The success story of this prestigious

mega project, highlights the fact that proactive involvement of

Construction Engineers right from initial stages and close interaction

with Design Engineers goes a long way in conceiving, designing and

deliveringdesiredproductmeetingallthepre-setobjectives.

Second articlein the Bulletin covers Fast Track construction of Residential

towers at Runwal Project in Mumbai wherein available resources wereeffectivelyutilizedtogiveoptimumcycletimes.

The thirdarticle briefly highlightsGammon’s contribution in construction

ofMetroinKolkata.

In ourquestto continually improve theBulletin, we will be glad to receive

feedback and suggestions from our valued readers to make Gammon

bulletinmoreandmoreinterestingandinformativeforthereaders.

Your feedback and suggestions may please be sent to

[email protected]

Wazirabad Approaches 03

High Rise Residential Towers 11

Gammon's Contribution in Kolkata Metro 13

Works-in-Progress 16

News Flash 17

Company News 18

Cover Photo: 5 x 660MW Power Plant, Tuticorin,Tamilnadu


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DESIGN AND CONSTRUCTION ASPECTS OF WAZIRABADAPPROACH STRUCTURES

Conceived by DelhiTourism& TransportD e ve l o p me n t C o r po r a ti o n , t h eSignature Bridge Project across rziver

Yamuna at Wazirabad in Delhi is indeeda Signature monument for Delhi andpromises to become modern touristdestination for the capital of India.Apart from innovating design of cablestayed bridge with eccentric bowshaped steel pylon, innovations havealso been made for the approachstructures flanking either ends of thebridge.

Some of the innovative features in theapproachesinclude:-

ä Aesthetically pleasing viaductstructures by use of most modernconstruction techniques available inthe country to construct a highlydurablestructureinminimumtime.

ä Precast-Post-tensioned-fullyintegralsegmenta l-Co ncr ete-Bo x Gi r d erstructure designed and constructed, forthe first time in India and that too forsuchamegaproject.

ä Superstructure comprising of

precast-segmental-single cell-boxspine grider with a pair of precastcurved ribs on each side of face, toe n h an c e a e s th e t ic b e a ut y o f superstructureaswellassupportthetipofcantileverofboxdeckslab.

ä Shape of the pier following the flowof forces, integral connection betweenthe piers and superstructure by cast-in-s i t u p i e r d i a p hr a g m t h e r e b yeliminating Bearings, which are themost brittle and fragile component in

bridgesystem.ä Dedicated acceleration and de-acceleration lanes for merging anddemerging loops in main flyover of westernapproaches.

ä Merging and demerging loops,truncated precast segmental single cellgirder having varying deck for viaductportion.

äLoop and main flyover segmentsstitching laterally at deck level by cast-in-situ RCC slab/diaphragm, therebyeliminating expansion joints to avoid jerk in traffic ride.

ä Use of Self compacting concrete of M60 & M65 grade, (designed in house)

for the first time in India for all piers andpierdiaphragmsoftheirwork.

ä Well (Cassion) foundation with jack downsinkingtechnology.

1.DetailsofProject

Proposal to constructs a new 8-lanebridge across river Yamuna 600mdownstream of the existing barragecum bridge at Waziradab, Delhi was ano u tc o m e o f d e c is i o n o f D e l hiGovernment of making a land mark

structure in Delhi and to develop thesurrounding area into a touristDestination. The proposed bridge will join marginal Bund Road at Khajuri Khasintersection on eastern side and will join Road No.45 (Outer Ring Road) onthewesternside.

Assignment also include developmentof Approaches on Western & Easternsides of proposed Signature Bridge,Fig.1. The scheme developed was notonly to provide the approach toSignature Bridge, but also to eliminatetraffic congestion along the road no-45(Outer Ring Road) in Western approachand at Khajuri Khas crossing in Easternapproach.

On Western side, grade separatorscomprises of flyovers, loops and rampswere constructed to ensure signal-freetraffic movement at the proposedintersection of the bridge with Road

No.45 and exiting intersection at Timarpur, Nehru Viahr and Wazirabad,F i g. 2 & F ig . 3 . R o a d w i d e n i ng ,construction of footpath, storm waterdrains, cycle track and subways werealsopartofWesternapproach.

E a st e r n a p pr o a c h i n cl u d e sconstruction of embankment of about2.0 Km length, river training work, riverprotection works, widening of existingroads, construction of roads, footpath,cycle track, storm water drain etc. Inaddition, 6 lane flyover was alsoc o n s t r u c t e d a t K h a j u r i K h a s

intersection with rotary at ground leveltoensuresignal-freemovement,Fig.3.

2.Geometricdesign

The alignment and position of proposed Signature Bridge was pre-fixed and challenge was to design ainterchange on west side of the samewithin the available space which issurrounded by many boundaries aslistedbelow.

(a) Existing Khyber pass bounding wallofDMRCwasonwestside.

(b)Tibetancolonyonthesouthside.

(c)Graveyardislocatedonnorthside.

Various planned entries/exit have to beaccommodated within the availablespacewithoutanyencroachment:-

Entry to and exit from proposed

Fig.1. Key Plan

Fig.2. Model view of western approach

to signature bridge

Fig.3. Model view of eastern approach

Arvind SinghSr. Manager (Projects)


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SignatureBridgetoISBTside.

Entry to end exit from proposed

SignaturetoAzadpurside.


Si gna tur e Br i dge to ex i st i ngWazirabadbarragecumbridge.


SignatureBridgetoTimarpiur.

Wazirabad barrage cum bridge to

ISBTandviceversa.

Wazirabad barrage cum bridge to

Azadpurandviceversa.

Azadpur to ISBT and vice versa

(alongRoadNo.45-OuterRingRoad)

After evaluating many alternatives,geometr y tho ugh co mpl ex w a s

designed within available space which

was best possible and meets all

geometrical requirements of standard

practice,Fig.2.

Apart from vehicular traffic cycle tracks

w er e a lso pl anned for a ll su ch

movement except to Signature Bridge.

C o mb i n in g e a s te r n & W es t e rn

approach nearly 50000 sqm of open

portion of elevated flyover 25000 sqmof closed portion of viaduct & 90000

sqmofembankmentwasrequiredtobe

constructed.

Flyover to be constructed was of

different carriageway widths 9.7 m, 11

m &12.5 m. In addition, there are zones

of acceleration and de-accleleration

baysinwesternapproachontheflyover

along the Road No.45 (Outer Ring

Road). Acceleration bay represent the

zone wherein extra width of one lane is

gradually provided over and above

conventional main carriageway width

so that traffic can be branched out the

diverging road from main carriageway

road.

Designing and constructing varying

widths of superstructure and also

maintaining the rhythm of structural

system opted for other conventional

zonesi.eprecastsegmentalportionwas

a challenging task. This has been

achieved by planning and close co-o r d i n at i o n b e t w e e n s t r u c t u r al

designers, client and contractor from

conceptiontocompletion.

3. Form of superstructure cross-

section

Broadly, superstructure comprises of precastsegmentallyconstructed,single

cell box spine grider of constant depthhavingprecastcurvedribsonbothofitsside to support the wide cantilever slabat its tip.3.0m long precast segmentaccommodation two nos of curved ribson each side of spine box segment wasadopted. Outer profile of curved ribsand precast segment has been soshaped so as to maintain smoothcurved bottom profile from one end toa n o th e r e n d. T h e se r i b s w e r emonolithically connected to spine boxat web soffit junction at it bottom endand cantilever flange tip at its upperend.

Curved ribs has been shaped of varyingwidthand varying thickness.Continuityof numbers of varying width of ribs incombination to spine box forms, archshaped opening in between ribs inelevation to enhance the aestheticappeal of superstructure,Fig.4 and Fig.5 Thickness of ribs was governed bystructuralstrengthrequirement so as tosustainthedesignstresses.

As in all jobs, heavily dependent onlarge scale precasting, standardizationof formwork was key feature of planning. It was planned to haveminimal component for casting of boxes of variable box width so that

maximum repetition of resource of formworkcanbedone.

For three different width of boxeshaving different carriageway width of

9.7m (10.3 m wide box), 11m (12.0 mwide box) &12.5 m (13.2 m wide box),two nos of spine box and two types of curved ribs, Fig.8, 9, & 10 have beenadoptedasindicatedinTable6below:-

Table6: Spine & Rib Detail

This was only possible by chargingradius of spine boxprofile w.r.t radius of outer curved profile of rib but while

d o in g s o c o mm o n t a n g e nt i smaintained at the intersection of twoFig.8, Fig.9 and Fig.10. Such planninghad resulted in requirement of only twotype of moulds each for rib as well asprecast segment for three differentdeckwidth.

For casting of segment, two long linebeds and one short line bed were used.Short line bed was exclusive used for12.0m wide segment (for spans havingplan curvature limited to 1000m curve)

while long line beds were used for10.3m wide, 12.0m wide & 13.2 widesegment. Total numbers of segmentswhich were cast for the elevated part of eastern approach as well as westernapproach structure are indicated in Table.7 below:-

Table7: Nos. of precastsegments

Same spine boxes and ribs were alsoused for varying width of decks inaccelerationandde-accelerationzone.

10.3 mWideBox

12.0 mWideBox

13.2 mWideBox

Type of SpineBox

SpineBox Type-1

Spine Box Types-2

Type of Rib

Rib Type-1 Rib Type-2

Nos. of segments for Each Deck Width

Deck Width

10.3mWide

Box

12.0mWide

Box

13.2mWide

Box

Total

Numberof 3.0mLong

Segment

201nos

780nos

150nos

1131nos

Fig. 4: Artistic impression of superstructure

Fig. 5: Artistic impression of integral

pier with superstructure

Fig. 8: Cross-section of 10.3 m wide box

(Spine Box Type-1), (RIB TYPE-1)


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4.Standardizationofspans

Effort has been made to have minimalexpansionjoint and to have continuousunit of larger length as large as possibleso as to have smooth rideable quality.Continuous unt of four spans, threespans&twospanswereadopted.

InWesternapproach,numberofspanina continuous unit and location of piers

were guided by location of start andf i n i s h l o c a t i o n s o f d i v e rg i n g(acceleration bay) & merging zones (de-acceleration bay) where in expension joint between spans are necessary. Th re e span s uni ts of len gth of 117m(35.25m+46.5m+35.25m) & 102m (32.25 m+37.5m +32.25m), twospans units of length of 64.5 m(32.25m+32.25m)wereadopted.

In Eastern approach, where there wasno such limitation, two nos of four

spans continuous unit of length of 163.5 m(35.25 m+ 46.5 m +46.5 m+35.25 m), Fig.11 & one unit of threespans continuous unit of length of 117m (35.25 m +46.5 m +35.25 m) of dualcarriageway of 11.0 m carriageway wasadoptedtoformaflyovertotallengthof 444moverKhajuriKhascrossing.

As it can be seen that continuousmodule of varying spans or varyingspan length were being made either byeliminating a middle spans or reducing

the span length by extracting one ormoresegmentsfromthecentralzoneof longestspans. A constant profile on theouter surface of the segment wasadopted for a box of given carriageway.

Variation of structural thicknessaffected only internal box. Segment incenter of span which were planned tobe extracted out to have a smaller spanhave similar prestressing duct as inadjacent segment. Such planning ind e s ig n s t a ge h a d r e s u l te d i nstandardization of span configurationandsegmentmoulds.

After a chiev ing mi nimu m cu bestrengthofnearly25mPa,shutterswereremoved and theribs wastransferred inthe stacking yard for curing andstacking. Due to large numbers of ribsto be cast for the project and paucity of space available in the casting yard,multiple stacking of precast ribs wasdone,photo14.

5. Casting of precast ribs & precast

segment

The curved ribs were cast well inadvance of casting of precast segment.Since all sides of ribs will be visuallyvisible in erected superstructure, henceit has been planed to achieve a formfinish to all surfaces of ribs. To achievethe same, ribs has been cast by placingthe shutter vertically in a tub (in casting

yard), Photo 11. Since reinforcementwas required to be projected out fromboth of ribs end to form a monolithicconnection with box, tub is filled withsand, photo 12. Such pre-precastcurved ribs were placed in the mould of precastsegment,Photo14.Onceallribs(4 nos) of segment were in finalposition, outer shutter of web andbottom shutter of cantilever which wasin multiple parts were assembled overthe casting bed,Photo 15. Prefabricated

reinforcement cage of segment waslowered into mould and then onlyinternal mould of box segment wasintrudedintothesame.

P r o v i s i o n i n p r e f a b r i c a t e dReinforcement cage of segment hasb e e n m a d e s o t h at p r oj e c t in g

reinforcement from precast rib end canbetakeninsideit.

Both short line as well as long linemethod of casting has been adopted

for casting of segment, Photo 17.Althoughinnershutterofspineboxwasin one piece and can be installed andextruded out on rails (mounted oversoffit slab) without any difficulties butouter shutter of spine box was made upin many parts (due to presence of ribs)and requires careful assembly afterplacement of pre-precast ribs as well asextraction of the same in reversesequenceaftercastingofsegment.

Fig. 9: Cross-section of 12.0 m wide box

(Spine Box Type-2), (RIB TYPE-1)

Fig. 10: Cross-section of 13.2 m wide box (Spine Box Type-2), (RIB TYPE-2)

Photo 11: and Photo 12: Tub for casting of curved ribs-base of tub filled with sand to embed

projected reinf at the end of curved rib

Photo 13 : Multiple level of stacking of curved ribs

Photo 14 : Placement of ribs of segmentsin long line bed

Photo 15 : Placement of external shutter

of web & cantilever of segment

Photo 16 : Placement of pre-fabricated reinforcement cage in mould

Photo 17 : Lifting of segment from bed


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6.Stackingofprecastsegment

After attainment of required strength of segment, it was lifted from casting bed,Photo 17 and transferred to stacking

yard where they were cured. Due topaucity of space in casting yard,multiple level (two or three level) of stacking of segments was adopted,Photo 18. Structural adequacy of lowersegment to tak e the w ei ght o f segments on the upper level has beenchecked before such system wasadopted. Lower segment got i ts u p po r t ed a t w e b l o c a t io n b ypositioningthesameonpedestal.

7. Provision of shear keys at joints of

precastsegments

Small sized shear keys were provided in

the webs on the end faces of precasts e g me n t s. T h e s a m e h a s b e e ncontinued till the inner face of the webso tha t the excess glu e can beevacuated and not get entrappedduring temporary prestressing. Foraesthetic reasons, the shear keys werenot exposed at the outer face of web,Photo 17. Due to presence of internaltendons, shear keys are positioneddifferently at every segment byeliminating the shear key where duct isplaced at the face of segment. Shearkeys were formed one one end facesegment by casting against already castsegment and on the other end the faceby placing a profiled steel bulkhead. The female part of the shear key wasinvariably formed at the fixed steelbu lk head . T he shea r k eys w erepositioned such that duct was alwayslocated at the flat male part of thesegment.

Apart from the web area of the boxgirder, shear keys were also provided inthedeckslabandsoffitslabtoassistthealignment process during erection. Thedeck slab shear keys also ensures that itbehaves contiguously for distributing

localwheelsloadeffectslongitudinally.

8.Constructionofsuperstructure

All three forms of erection techniquesas given below which were used in the

p a st f o r v a ri o us p r oj e c ts w e reemployed for construction of variousstretchesofflyover:-

Using Launching girder (Overhead),Photo19andPhoto20.

Using Ground Supported tresties/Staging supporting troll ies inconjunction with crane (of requiredcapacity and boom length) forlifting of segments, Photo 21 andPhoto22.

Using Ground Supported Trestlesstaging supporting troll ies inconjunction with potable gantriesfor lifting of segment. In such caseportal gantries were straddlingnearly two carriageway width,Photo23andPhoto24.

Photo 18 : Multiple tier stacking of precast segment

Photo 19 and Photo 20: Precast segments are

hung from lunching girder

Photo 21 and Photo 22: Ground supported trestles/

staging supporting segments lifted by crane

Photo 23 and Photo 24: Ground supported trestles/

staging supporting segments lifted by portal gantry

straddling two carriageway width (30 m approx)

Span by span construction wase n v i s a g e d f o r e r e c t i o n o f superstructure. After dry matching of segments, epoxy application andtemporary prestressing was done oneby one. After stressing of first stagecables, endof each span wassupportedon trestles mounted at top of commonfoundation provided for permanentpiers. As a additional precautions, suchtrestles were a lso connected to

permanent pier to transfer anyunforeseen horizontal forces duringconstruction.

First stage cables stressed weresufficient to span the self-weight of erected span, temporary prestressingframesandconstructionload.

Once all such individual spans of acontinuous unit were erected, in-situdiaphragm was being made which notonly establish the continuity of superstructure but a lso forms a

m o n o l i t hi c m o m e n t r e s i s t in gconnection with intermediateas well asend piers, Second stage cables whichwerein the formof cap cables (at top of deck) and long cables (at bottom of deck) were threaded and stressed.Aftercompletion of all second stage cablesstressing,temporary supportsprovidedat the end of each span were graduallylowered down so as to transfer the loadtopermanentpiers.

Precast rib were placed in position in

diaphragm external shutter to maintainthe continuity of ribs pattern on outerfacia of erected superstructure keepingsame spacing with abjacent ribs as it


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waskept for precast segment, Photo 25,Photo26&Photo27.

For casting of intermediate / anddiaphragms of all continuous units

superstructure, sel f compactingconcrete was pumped as it was notpossible to v ibrate such highlycongestedreinforcedzone,Photo27.

9. Construction of acceleration and

de-accelerationbay

Design & construction of supers t r uc t u re a n d s u b st r u c tu r e o f Acceleration bay and De-Accelerationbay, was challenging considering thedeck carriageway width has to begradually and smoothly widened bymaintaining the same form of structure

andsametypeofconstruction.

It wouldbe very uneconomicalsolutionto have a precasting memberof varyingwidth to exactly match the required

width of varying width deck. Hence asolution of multiply standard precastmember in conjunction with variablewidth of cast-in-situ stitch betweensu ch mu l ti p l y s tand ar d pr eca stmember was adopted to achievedesired result.

Twin precast member (spine box withribs) were chosen from available formwhich has been used for standardsuperstructure and were transverselyintegrated by cross stitching in situ

betweenthetwo.Such transition zone has been dividedinthreesubzonesasgivenbelow:-

Transition zone-1, This is intial zone of varying width of carriageway whereonesidedcarriagewaywidthremainstobe of constant width but othercarriageway width was required to begradually increased. To achieve same,two boxes of standard width (12.0 wideb o x, s p i ne b o x t y p e - 2 ) w e r eindependently erected with the same

construction methodology as adoptedfor standard span followed by in-situstitchinthevaryingbetweentwo.

Transition zone-2, This the middle zoneof varying width of carriageway. Toachieve the same, two boxes (as usedfor 10.3m wide box, spine box type-1)with curtailed arm on one side wereerected independently with the sameconstruction methodology as adoptedfor standard span followed by in situstich between two in varying gap. Suchbox section was geometrical un-symmetrical about vertical axes due to

curtailed arm on one side of boxresulting in plan eccentricity Toc ou n te r ac t s u ch e f fe c t o f p l aneccentricity, transverse slits, Fig.34 wasprovided in deck slab (on cantilever

Photo 25 : Erected superstructure rested on end trestles with gap between two with pier

reinforcement projected between t wo units

Photo 26 : Staging and precast rib put in position for in-situ connection of superstructure units with pier

Photo 27 : Self compacting concrete is poured with pumps

Photo 28 : Finished structure

Photo 29: Tansition zone-1 : - boxes(12.0 wide each) of dual carriage way were jain

by cas-in-stitch (of varying width)

side) of precast segment so thatprestressing force does not flow in theun-symmetric part and effect of prestress remains symmetric aboutspine box section. Such slits wereprovided at precast segment joints aswell as in the middle of segment. Aftercompletiton of all prestressing in spinebox, such as transverse slits were filledwith grout. A cable was also stressedthrough hole left in cantilever tip toimpart axial compression across suchslited joints in slab after achievement of requidestrengthofgrout.

Transition zone-3, This is end zone of varying width of carriageway. Toachieve the same, two boxes (as usedfor 12.0 m wide box, spine box type-2)

with curtailed arm on one side wereerected independently with the sameconstruction methodology as adoptedforstandardspanfollow by in-situ stitchin thevarying gapbetweentwo chosenbox section was also geometrical un-symmetrical about vert ical axisresulting in plan eccentricity, nos of strands in predefined cables locationwere varied on left side of the box andright of the box so that no net primarymoment is generated about vertical

axis of the box section. This was onlypossible as box spine used in this zonewas quite wide and plan eccentricitywas not too much. Of course such un-symmetric prestressing draped in webshad caused torsion and box structurehasbeendesignedforthesame.

Photo 30: Transition zone-2 : - twin boxes (use

10.3 m wide deck) with curtailed arm on one

were joined by cast-in-stitch (of varying ..)

while other carriagway was made with regular

Photo 31: Transition zone-3 : - twin boxes (use

12.0 m wide deck) with curtailed arm on one

were joined by cast-in-stitch (of varying ..)

while other carriagway was made with regular


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Dueto variations in structural systemof three transit ion zones, a l l suchtransition zones were separated byexpansionjoint.

In all three transition zones, pierd i a p h r a g m s ( e n d a s w e l l a sintermediate diaphragm) of both joining boxes were extended and joined together to form a portal bentalong transverse direction also. Firstlypier diaphragms were done for lengthe q ui v al e nt t o b ox w i dt h w h il eindependently erecting superstructurePhoto 29, Photo 30 and Photo 31. Gapbetween two pier diaphragms alongwith in-situ slab was done in one gou s i ng s h r i nk a g e c o m pe n s at i n gcompound.

Double-loop Joint was adopted at allcast- in-place connection of deck slabfor joining of two independent precastbox segment. In such arrangement of connection, s ide-loop bars wasprovided at the end of each precastsegment while casting the segment. The center-Loop bars which is annulari n s ha pe w it h a w el de d l ap i soverlapped with s ide-loop barsprojecting from both precast boxsegment.

10. Erection of precast segment of

transitionzones

Erection of un-symmetrical segmentsf o r t r an s it i on z o ne s i s e q ua l lychallenging. The lifting points werematched with geometrical plan CG of segment so that segment remainshorizontal in allstages. Most of erectionof such un-symmetrical segment wasdone by overhead launching girder. To

enhance transverse stability of erectedspan (after stage-1) on temporary stoolat both end of span, precast concreteblock were planned at top of deck andkept it there till superstructure isintegrated with piers (till end of stage-2erection),Fig.32andFig.33.

11.Constructionofpiers

The forms of the pier follow the flow of forces. Connection between the piersand superstructure has been madeintegral. Wall shaped pier of varyingwidth and varying thickness at top with

superstructure. Being a integralstructure, each continuous unit wassupported by set of pier. At expansion joint, twin piers were provided tosupport each continuous unit on eitherside of joint independently by separatepiers, Photo 36. End piers were madeslimmer than intermediates piers asend piers has to flax more thanintermediates piers as end piers due tostrain included effect such as shrinkagea n d c h ee p o f c o nc r et e , g l ob a l

temperature changes and elasticshortening of concrete due to stressingof continuity cables. Being a integralp ie r w it h v er y h ig h r ig id it y o f superstructure and foundation, piertend to deflect in double curvatureinducing veryhigh moments at topandbottom with contra flexure nearly atmid height. Hence thickness of all piersof continuous unit varies keepingminimum at mid from structural pointof view. Thickness intermediate andend piers varying 1.2 m (at top andbottom) to 1.0 m (at height) & 0.75 m(attop at bottom) to 0.6 m (at mid height)respectively, Photo 36 and Photo 37since access for vibration of thin wallshaped pier was not practical , itplanned to use self-compactingconcrete for casting of pier & pierdiaphragm. About 50 cum self-compacting concrete of M60/M65grade was used for casting of piers pierdiaphragmintheproject.

Full height of pier (7.5 m Approx.) wascast in one go. No tie bolt was allowedto pass through pier shaft to supportthe shuttering around. This wouldrequire a very strong arrangement of

Photo 32 and Photo 33: Erection of unsymmetrical

Segments by overhead launching girder

Photo 37 : Expansion jt piers (0.75 m thick at top

& bottom & 0.6 m thick in center)

form work to with stand the fluidpressure of compacting concrete,Photo46.

Photo 34 : Reinforcement detail of pier-compatible

to requirements of high seismic zones

Photo 35 : Shuttering for pier (self compacting

concrete is used)

Photo 36 : Intermediate pier of unit (1.2 m thick

at top & bottom & 1.0 m thick in center


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12.Projectsitestratigraphy

Stratigraphy along the project siteconsist overburden soil underlaid byquartzite. The depth of rock varies

substantially across the bridge site. Ingeneral, rock is from west to east of projectside.

Hence in western approach, openfoundation were provided whereverrock is available at shallow depth andgroup of piles socketed in rock wereprovided as foundation where rock isavailableatmediumdepth.

Rockwasseverelyweatheredat shallowdepth and moderately weathered atlarge depth. The rock core recovery

ranges from 0 to 25% with 0 to 10% inthe the zones 3 m - 4 m below the soilinterface. The Rmr values range from atshallowdepth.

In Eastern approach, rock was at veryhigh depth, hence well (cassion)foundation adopted and rested indensesoilstricture.

13.Constructionofopenfoundation

Isolated footings as well as combinedfootings were provided depending on

space constraints, pier spacing etc.S o m e c o mb i ne d f o ot i ng s w e reconstructed in stage with verticalconstruction joint based on trafficmanagementatgroundlevelalongringroad.Thesamefoundationwereusedtorest trestle supporting overheadlaunching girder as well as trestlesupporting spans temporarily (afterstressing of stage-1 cables). Design hasbeen made for each foundation totransfer such construction loads during

c on s tr u ct i on p e ri o d a s w el l a spermanentloadsduringitsservicelife.

14.Constructionofwellfoundation

Detailed soil survey was conducted atevery pier location and results gavemore or less similar soil characteristics.Upper stratum comprises of fine send(upto 10.0 m) followed by silty clay withsmall pebbles (upto 19.5 m). Lowerstratum (19.5m to 60.0 m) consists withpredominantly of sandy silt low tomedium plasticity. SPT value ranging

from 25 to more than 100 reportedexhibiting very stiff to hard consistencyofstrata.

A detailed study was carried out to

identify the depth of potential of liquefaction in upper layer of soil and ithasbeenconcludedthatupper10-12msoil are having liquefaction potentialunder seismic event. The formationlevel of flyover was nearly 16 m abovethe bed level. Proposal of pile was notpracticalasitwasbecomingtooslenderinseismicevent.

Hence proposal of well (caisson) withstaining thickness of 0 .8 m wasprovided for a depth of 35-39 m for wellfoundation. A separate well foundationwas providing for supporting eachcarriageway, “Jack down” methodsupplemented with air jetting/ water jetting was used for sinking of well,Photo38.

There are 24nos of similer type of walls

which were sunk in Eastern approachusingthisinnovatingtechnique.

In Western approach, some part of approach structure was in river zone. Insuch, river zone, rock was available atshallow depth (nearly 10.0 m belowriver bed level). Open excavation wasnot possible in such zone. Hence wellfoundation was adopted for suchpurpose which are rather complexbecause they were required to befounded on sloping rock which is also

the scour level. Moreover stringentguidelinesof“Standard codeof practiceof Indian Roads Congress” for having asump(shear key)of 600 mmat the baseof well into soft rock of diameter of nearly 1.5 to 2 m less than inner dredgehole was required to be followed. Inaddition vertical anchoring of wellfoundation by reinforcing bars was alsorequiredtobefollowed.

The foundations adopted wereconventional wells sunk by the jack down method with thickened staining.Pri or to the w el ls r ea ching thepredetermined founding level, rock level was established by probing /

Photo 38 : Jack down method employed

for sinking of well

boring all along the outer periphery of well.

Drilling of 193.5 mm O.D was first donein soil underneath well curb and

continued up tonearly 500 mm intotherock. A partially perforated pipe waslowered down in each of these drillingof 150 mm dia is continued upto nearly6.0m into rock.Thenthereinforcentbarof 32 mm dia along with other bunch of reinforcement is lowered down andmicropilewasgrouted.

Once all micropiles in the well wereinstalled one by one and gainedadequate strength, then well wascleaneduptorocklevelbelowwellcurb

byairliftingprocess.By approximating the rock contour, inthe dredge hole, steel ring of 10 mmthick plate with stiffeners of 150 mmsize channel was fabricated and lowreddown inside the periphery of the well.Gap between the ring and slopingcutting edge of the wall is filled withconcrete had hardened, wells weredewatered and the rock portion insidethe steel ring is excavated to a depth of 600 mm in the dry. The rock surface is

cleaned andthe bottomopening insidering along with upper part of bottomplug is concreted. Thereafter a R.C.Cslab was cast which was mainly as asafeguard to receive the upwardpressure on the plug. The well is thencompleted in the normal manner.Inside opening of well was filled withsand and capped by a layer of concrete. The well cap and pier were thereafterexecutedintheconventionalmanner.

15. Construction of closed portion of

Ramp

It was planned to have a reinforcedearth wall structure for all the rampadjoining to open portion of flyover.High performance concrete with ResklifromlinerfinishofM45hasbeenusedinfaciapanelsofREwalltocreatebamboofinishinconcrete,Fig.39,Fig.40

Fig 39 Junction detail of viaduct and

ramp (RS wall structure)


10/20

Being a integral structure, where end

pier also flex longitudinally along with

superstructure due to change in daily

and seasonal temperature, it was

planned to have separate structure (in

the form of multiply columns) to

support the dirt wall /approach slab at

its top. Expansion joint was provided in

between dirt wall & superstructure to

accommodate the movement of

superstructure. RS wall panel facia was

also provided covering multiply

c o lu m ns w e re s o s p ac e d a n d

positioned so that it that it does not

interfere with steel strips holding RS

wallpanels.

16.Conclusion

The successful completion of suchmega and challenging project has

revealed that the difficult site condition

canbe dealt by innovative construction

techniques and still structure can be

made aesthetic-appealing and cost-

effective. The design of the flyover has

focused on adoption of local material

a n d a v a il a b l e e q u i p m e n t w i t h

innovative techniques uncommon in

India.

I t i s expected that the v ar i ou s

innovative techniques adopted in this

pro ject may for m the bas i s for

construction of numerous flyover

/Bridge across India in the coming

years.

A combined team effort and close co-

ordination between Owner, Consultant

and Contractor at every step i. e

c o n c e p t i o n , d e s i g n a n d

i m p l e m e n t a t i o n w a s a m a i ncontributing factor for this success

story.

Photo 40: liner in Rs wall panel shutter

A TEDE Gateway Women event wasX

organized in NCPA, Mumbai on 29th May to

highlight achievements of women who

have attained great heights in their field.

Over twelve dynamic women speakers

from various walks of life shared their

glorious journey to success through

presentationandspeech.

LeilaSeth

LeilaSethwasthefirstwomantotoptheBarexaminations in London in 1957. She wasthe first woman judge of the Delhi HighCourtand the first woman to become chief

justice of a state in India. She was appointedas a judge in 1978 and retired as Chief

JusticeofHimachalPradeshin1992.

She was a member of the 15th LawCommission of India and co-authored thereport suggesting amendments to theHindu Succession Act giving equal rights todaughters in joint family property. She wasalso one of the three members of the 2012committee (known as the Justice VermaCommittee) which was constituted in theaftermath of the horrendous rape in Delhiof the young woman known as Nirbhaya.Sheis involved in probono work pertainingto health, human rights, women and

children’s rights, education, environmentandethics.

UpasanaMakati

Upasana Makati is the Founder & Publisherof White Print – India’s first English lifestylemagazineforthevisuallyimpairedinBraille.Launched in May, 2013, she started WhitePrint to build a readership of enthusiasticindividuals who would look beyond therealms of mere news as reading material.She plans to make available the luxury of reading well-researched and informativearticles along with leisure reads to the

visually impaired community. Upasana’s journey so far has been bittersweet.

SonamKalra

SonamKalra has been trained in IndianClassical and Western music traditions andis equally adept at singing both genres.Sonam has learnt Indian Classical musicfrom Smt. ShubhaMudgal and Pt. SarathiChatterjee and has alsostudied Gospel andJazz with Ashley Clement in Singapore, aswell as classical opera under the notedtenor, HurChul Young. Sonam is known forher powerful yet sensitive voice and abilityto blend styles, yet stay true to the music.Sonam has also sung in venues aroundAsia,South Africa, Europe and NorthAmerica.

Natalie Di Luccio, Artist | Playback Singer |Soprano

Natalie Di Luccio is a classically trainedSoprano from Toronto, Canada. She hastoured with the Grammy & Oscar AwardWinning Composer. In India she sings inmany languages including Hindi, Tamil,

Telegu, Gujarati, Punjabi& Marathi. Nataliehas done playback for Bollywood films likeLadies Vs Ricky Bahl, English Vinglish,Chennai Express & the Tamil film.Her aim isto constantly finding ways of bridging thegap between the east & west throughmusic.

Dr Ananda Shankar Jayant ClassicalDancer|Choreographer

Dr Ananda Shankar Jayant, is as one of I n d i a’s l e a d in g c l a s si c a l d a n c er s ,choreographers and dance scholars.Ananda was diagnosed with breast cancerin July 2008.She underwent surgery,chemotherapy, radiation and Herceptintherapies for 2 years. Through it all shecontinued to dance, teach, choreograph,travel and perform on tour. She is inremission now, and continues to be underm a i n te n a nc e t h e ra p y a n d r e gu l a rsurveillance.

Ananda has been decorated with twonational awards : “Padma Shri” in 2007 andthe Sangeet Natak Akademi Puraskar forBharatanatyam in 2009.She has also beenhonoured by the Govt. of Tamil Nadu withthe“Kalaimamani”,andwiththe“KalaRatna”bytheformerGovt.ofAndhraPradesh.

Ananda holds a Masters degree in AncientIndian History, M.Phil in Art History and aPh.D in Tourism. She actively lectures onbreast cancer support and advocacy issues,having successfully battled the illness overthe last two years. A senior officer of theIndian Railway Traffic Service, Ananda iscurrentlyposted in Secunderabad.

Shwini Asokan, Co-founder, CEO at MadStreetDen&MadStreetLab

Ashwini along with her husband Anand isbringing the power of Artificial Intelligenceto every mobile user. An artist at heart,Ashwini, armed with a Masters in Designfrom Carnegie Mellon University wasleading the mobile innovation team atIntel’s Interaction and Experience ResearchLab (IXR) in the USA. She spent 10 years inCalifornia working on how cutting edge

technology can be useful to people.Ashwini quit her job at Intel only in May2014toworkfulltimewithMadStreetDen.

TEDE Gateway WomenX


11/20

1.Introduction:

Population in India is growing at rapidrate which coupled with increasedtrend of migration to urban areas, hasescalated demand of residentialaccommodation in urban areas. Urbanland supply being limited, the need forhigh rise buildings is becoming moreand more relevant now than everbefore.

Mumbai, the commercial and financialcapital of India, has most of the high-rise buildings in India - land beingexpensive.

Th e construction of residentialskyscrapers in Mumbai started in the

1970s, when Usha Kiran and MatruMandir were developed and stood atabout 250 feet, or25 floorseachbutthiswas followed by a two-decade longsignificant lull until the mid-1990swhen construction boom began takingthe skyline upwards, with a majora c c e l e r a t i o n i n t h e p a c e o f development kick-starting in 2000,when the textile mill land was releasedin Lower Parel area for residentialconstruction.

More than 2500 high-rise buildings arealready constructed in MumbaiMetropolitan Region in addition tomore than a thousand mid-risesexistingalready.

Mumbai is the city with the 12thhighest number of skyscrapers in theworld. Most of skyscrapers in Mumbaiare residential. Today, Mumbai isundergoing a massive constructionboom, with more than 15 Supertalls,hundreds of skyscrapersand thousands

of high-rises under construction.Currently Mumbai is perhaps the homet o l a r g e s t n u m b e r o f u n d e rconstruction supertalls and skyscrapersintheworld.

2.RunwalProject-ScopeofWork:

Due to the overcrowding of populationand also the air pollution arising due totraffic, people want to live in a peacefulenvironment with proper facility.Citizens of Mumbai expect the bestliving standard and are accustomedto live in high rise structures. RunwalHomes Private Limited (RHPL) is one of the major developers in Mumbai andPune having excellent customersatisfaction record for constructingresidential towers and malls in the city.

RHPL has planned to construct 8 highrise residential towers comprising of 1574 nos. flats in their 14 acre landlocated at premier location in Mulund-Goregaon Link Road @ Mulund (W),Mumbai. The proposed amenities inthese towers for their valued customerinclude:

L a rg e s t g a r d en w i t h w o o dlandscaping.

Clubhousewithswimmingpool

Highspeedelevators

Rainwaterharvesting

SewageTreatmentPlant(STP)

Shoppingcomplexes

Large podium with ample carparking.

Gammon has been entrusted toconstruct four towers out of eighttowers. The scope of work includesconstruction of all civil works likefoundations, basements, podium and

36 habitable floors of 11 ft. ceilingheight including block work andplastering inside and outside of thestructure.

For the construction of high risebuilding, there are some requirementsthat should be fulfilled. Safety andhealth aspects are the most importantrequirementofthehighrisebuilding.

3.ExecutionofHighrisetowers:

3.1SiteMobilization:

Immediately on receipt of the Work Order in mid of 2010, inspite beingmonsoon, Gammon swung in to actionand started mobilization of various

resources including manpower, plantandequipmentetc.

The excavation works of tower weretaken up in advance by developer andGammon put the resources directly forcastingofPCCandraftfoundation.Fullyautomatic 30m3 capacity batchingplant was erected at site on fast track basis.

3.2ShutteringMethodology:

Each floor consists of about 60 nos.(approx.) odd size columns, shear walls,double staircase, lift core walls, beamsandslab.

Since the columns, shear walls,core lifts&beamswerehavingdifferentsizesanddepths in each towers, Doka framingcould not be effectively designed tosuite such varying dimensions of alls t ru c t ur a l m e mb e rs a n d h e nc eGammon mobilized Doka panels onlyfor columns and shear walls anddecided to go for conventionalshuttering for deck slab by using cupl o ck s , a c r o w s p a n s & p l y wo o dthroughoutthebuilding.

3.3SlabCycle:

Each floor slab divided in four parts andconcreting was done in four pours.While work was in full swing weachieved 2 slabs (8 pour) per month ineach tower i.e. 15 day cycle. Later ondue to stoppage of work and otherhindrances due to variety of reasons,the speed was reduced to 1.5 slabs permonth.

3.4ReinforcementWork:

Mechanical couplers were used forhigher diameter of reinforcement barsin columns instead of regular lappingmethod of reinforcement. Mechanicalc o u p l e r r e d u c e s w a s t a g e o f reinforcement by 25% in columns andcan be used very effectively for higherdiameterfrom16to32mmbars.

3.5TowerCrane&Concreting:

Telescopic tower crane was erected in

one of the lift well and most of thecolumns & shear walls concreting wasdone by tower crane bucket and slabhasbeendonebyconcretepump.

CONSTRUCTION OF HIGH RISE RESIDENTIAL TOWERS

R. RaghavanGen. Manager (Projects)


12/20

3.6Blockwork:

When the floor reached at Level 6 theblockworkwasstartedforthehabitablefloors. 150mm thick solid blocks for

partition and 200mm thick solid blocksfor outer periphery walls of the towerwereused.

3.7InternalPlaster:

Plasterworkoftwotypeswasused:

1. Cement face plaster in wet area likekitchen, toilet and commonarea for thethicknessof12mmto15mm.

2. Gypsum vermiculate base in balancearea like living, bed, master bed roomand passage of thickness 12mm to

15mm.

Table 1: General Details Of Project

Sr.No Des cripti on U ni t Towe r n o.1 Tower

no.2

Tower

no.3

Tower

no.4

1 Total Built up area Sqft 297696 303933 367357 468442

2No. of flats in eachfloor

Nos. 6 6 6 6

3 Flat configuration Nos.2 BHK - 4

nos

2 BHK - 4

nos

2 .5 BH K - 4

nos

3 BHK - 4

nos

Nos.2 .5 BH K - 2nos

2.5 BHK- 2nos

3 BHK - 2nos

3.5 BHK- 2nos

4Total no of flats ineachTower

Nos. 216 216 216 228

5Built up area p erflat

Sqft2 BHK -1165 sqft

2 BHK -1165 sqft

2.5BHK -1475 sqft

3BHK -1960 sqft

Sqft2.5 BHK -1475 sqft

2.5 BHK -1475 sqft

3 BHK -1740 sqft

3 .5 B HK -2160 sqft

6Basement +Podium + Stilt

Nos. 2 + 5 + 1 2 + 5 + 1 2 + 5 + 1 2 + 5 + 1

7 Residential floors Nos. 36 36 36 38

8 Fire check floors Nos. 1 1 1 2

Table 2: Tower wise QuantitiesSr.

No Description Unit

Tower

no.1

Tower

no.2

Tower

no.3

Tower

n o. 4 To ta l

1Total Built uparea Sqft 297696 303933 367357 468442 1437428

2 Concrete Qty cum 16100 16100 18500 24865 75565

3ReinforcementSteel Qty MT 3175 3145 3540 4260 14120

4 Blockwork Qty SQM 23517 24010 29020 37005 113551

5

Internal CementPlastering &Gypsum SQM 78781 80432 97216 123967 380397

6ExternalPlastering SQM 42054 42935 51894 66174 203057

Table 4: Plant & Equipment Deployed

(1) Batching Plant 1 no.

( 2) Tower Crane 4 nos.

(3) Builder Hoist 8 nos.

(4) Diesel Generators 5 nos.

(5) Passenger Elevator 4 nos.

Sr. No.Gradeof

ConcreteLevels

A Columns & Shear Walls

1 M40 Raft

2 M65 First level to Sixth level

3 M60 Seventh level to Tenth level

4 M50 Eleven level to Twenty level

5 M45 Twenty One level to Twenty Third level

6 M40 Twenty Fourth level to Twenty Ninth level

7 M35 Thirty level & aboveB Slabs & Beams

1 M40 First slab to Nineteen slab

2 M35 Twenty slab to Twenty Fourth slab

3 M30 Twenty Fifth slab & above

Table 3: Grade of Concrete

3.8ExternalPlaster:

External plaster is carried out in threevertical stages considering height of the structure. Double coat of thickness

25mm wasused forexternalplaster. Forall dead walls plastering, suspendedplatform used andbalance structurebyusing‘H’framescaffolding.

1stStage - UptoL15floor

2nd Stage -L15TOL27floor

3rd Stage - L27TOTerracefloor

3.9 ProgressMonitoring:

Progress was monitored on daily basis.Also weekly meeting held withdevelopers, clients, architect and

structural consultants to monitor thep r og r es s a n d s o lu t io n f o r a n yhindranceindrawingsandexecution.

Fo r Gammo n this i s the tal lestresidential structure constructed so farthough tower under construction atNathani Heights in Mumbai is far tallerthan these towers. Outof four towers atRunwal three towers terrace has beencompleted.

4.Credits:

We take this opportunity to thank ouryoung and energetic team at site forexecu t io n w i th fu l l su ppo r t o f dedicatedteamofclientengineers.

We also thank Mr. Subodh Runwal,Director of Runwal Homes Pvt. Limited(RHPL) and Mr. Samir Dhar, DirectorProjects for their support for projectsmonitoring and execution for oursuccess.

A team of CIVIL ENGINEERs went to a small village for road survey. Three/ Fourvillagers,outofcuriosity,wenttotheteamandoneofthemasked,“Whatareyoudoinghere?”

Oneof theCIVIL ENGINEERsreplied,“Anewpuccaroadis comingup inyourvillagesowehavecomeheretodosurveyforthisroad.”Pointingtotheinstrumentsthevillageraskedfurther,

“Whatarealltheseinstruments?” The CIVIL ENGINEER replied,”This is an optical theodolite.That one is level.That oneisTotalStation.These instrumentsarerequiredto givecenterlineof theroad.”

The villager said,”We in villages do give center lines though we do not have anysuch instruments.”

TheCIVILENGINEER asked,“How do youdo that?” The villager replied, “Very Simple. We bring one DONKEY, put a gunny bag filled

with chuna andcut small hole in thebag.Then wehit theDONKEYwith a stick.Thetrained DONKEYruns in a straight line, chuna falls from thehole of thegunny bagandwegetthecenterlineoftheroad.”

The leader of the team asked.”Well, but what do you do, if a trained DONKEY is notavailable?”

Theold veteranvil lager replied,“Then wecall CIVILENGINEER!!!”

SUBSTITUTE FOR CIVIL ENGINEERS !!!

- M. U. Shah


13/20

GAMMON'S CONTRIBUTION IN KOLKATA METRO

K olkata is only city in Indiawhere all mode of transportfrom Metro Rail to hand pulledRickshaw including Tram is available.

Tram service started in 1873 with 200 Tra ms carr yi ng abou t 1.8 La cspassengers on average week days.

First Metro Line i. e. North – Southstarted in 1972 commission 1ststretch Esplanade to Bhowanipur inOctober 1984. There after it wasextended up to New Garia (KabiSubhash) to Dumdum of 2.77 km. Atpresent 4.4 Lacs passenger travell onaverageweekdays.

Gammon journey in metro wasstarted at Kolkata in Phase I (DumDumtoTollygunje)inearly80’swhereG a m m o n e x e c u t e d 1 . 2 k mdiaphragm wall 600 mm width forSection14A,14Bi.e.JaguBaburBazarto Asutosh College for constructingunderground Metro (Cut and Covermethod). Thereafter Gammon’s roleextended in Metro construction inthe city like Delhi, Bangalore&Chennai for viaduct construction,station building and undergroundMetro construction by Tunnel boringmachinefoundremarkable.

A.Metrolinedetails

In order to strengthen Metro serviceat Kolkata, Phase II Metro line hasbeenplanned&startedunderKolkataMetro Rail Corporation Limited(major part through JICA loan & restwith domestic fund) & Rail Vikas

Nigam Limited (domestic fund).Gammon has contributed a lot inMetro construction in Phase II since2009.

OWNER LINE KM

Metro Rail (Broad Gauge) North - South (Dum Dum - New Garia) 25KMRCL (Standard Gauge) East - West (Howrah Maidan - Sector V) 14

Metro Rail / RVNL (Broad Gauge) Joka – BBD Bag 12

Metro Rail / RVNL (Broad Gauge) New Garia - Ka bi Subhash 21

TOTAL 72 KM

B. Contract has been awarded under 4 packages for a value of Rs. 9380 Million

PACKAGE WORK VALUE OWNER ROUTE

EWE14.725 km Viaduct from Subhas Sarobar to

Sector - V2125.3 Millions KMRCL East – West

JMS23 elevated Stations (Behala Bazar,Taratala &

Majerhat)1626.6 Millions

RVNL

Joka– BBD Bag

ANV2 5.27 kmViaduct fromVIP Bazar to Nicco Park 2245.7 Mil lions.

New Garia –

AirportANS2

7 elevated Stations (Barun Sengupta,

Beliaghata, Gour Kishore Ghosh, Nicco Park,

SectorV, Technopolis & Bidhan Nagar)

3389.6 Millions.

TOTAL 9387.2 Millions

C. Scope of work – Approximately 11 km viaduct with 10 station building constructionunder 4 packages.

PACKAGE ACTIVITY PILE CONCRETE

QUANTITY

STEEL

QUANTITY EQUIPMENT

EWE14.725 km Viaduct from SubhasSarobar to Sector – V

35,000 RM 1,06,000 m³ 11,300Hydraulic Rotary

Pilling Rig,Batching Plant

Concrete Pump /Placer, Transit

Mixers, 250TcapCrane and

Mobile Craneetc.

JMS23 elevated Stations (BehalaBazar, Taratala & Majerhat)

11,000 RM 42,000 m³ 8,000

ANV25.27 km Viaduct from VIP Bazarto Nicco Park

60,000 RM 1,40,000 m³ 14,000

ANS2

7 elevated Stations (BarunSengupta, Beliaghata, GourKishore Ghosh, Nicco Park,Sector V, Technopolis & BidhanNagar)

44,000 RM 1,25,000 m³ 12,000

TOTAL 1,50,000 RM 4,13,000 m³ 45,300

D.Present & Futuristic Photographs

EWE1 ANV2

JMS2 ANS2

Amal BhattacharyaDy. Gen. Manager (Projects)


14/20

SERIOUSLY, LAUGHTER IS THE BEST MEDICINE

Tenderness of Pre-tender Site Investigations !!! - M. U. Shah

In good olden days, the most commonlyused passenger vehicle at constructionsites was Mahindra Jeep of model MM DP540. While this model of Jeep was mostpopular in those days, at the same time itwas also notoriously famous for suddenbreak-downs at odd times without anynotice.

OneProject Manager of a remotely locatedbridge job was asked by HO to carry outPre-tender Site Investigations for a nearbyprestigious Work-in –View (WIV) – a major

bridgejob.Such pre-tender site investigations of major WIVs are usually carried out bydeputing staff of different levels inorganizationalhierarchyfromsiteandHO.

1)FRESHJUNIORENGINEER(CIVIL)

To start with PM sent one young freshJunior Engineer (Civil ) for preliminary siteinvestigations. While returning at night hisJeep broke down. Since the location wasvery remote, there wasno possibility of anyHotel being available in the vicinity fornightstay.Afterextensivesearchforcoupleof hours, JE could locate one farmer'splace who agreed to provide shelter for anight but said that they don't have extraroomandaskedhimwhetherhewouldliketo stay upstairs sharing the room with ababy or alternatively he can sleep in theshedofbuffalo.

JE thought for a moment and opted for abuffalo shed thinking why to get wet withthebaby.

Next day at 7 O'clock in the morning, onesweet voice woke him up. He saw one

gorgeous looking cute young girl in hersweet seventeen with a cup of tea in herhandwishinghim“Goodmorning".

After pinching himself repeatedly andconfirming that he is not in his dreams,while continuingto rub his eyes, JE asked, "Whoareyou?”

The girl replied, " I am the 'baby' of thefamily&furtherasked,“Whoareyou?”

JE replied,“ I am stupidfellowwho opted tosleepintheshedofbuffalo.!!!!"

(Even several years after this incidence, if

someonewastoaskhimwhichisthesinglemost regretful choice he made in his life;with tears in his eyes, he would narrate thisincidence.)

2 ) F R E S H J U N I O R E N G I N E E R

(MECHANICAL)

Then PM sent one fresh young MechanicalEngineer for site investigations. His Jeepalso broke down while returning at night.He landed up at one widow's place whoreadily agreed to provide shelter for thisyounghandsomeMech. Engineer.

Aroundmidnight, thewidowwakes himuptosaythatthedoorofherbedroomisopenand thatshe could not lock the door asit'slatchrequiresrepair.

Unabletounderstandthehint, rubbinghiseyes, Mech. Eng. gets up, goes to Jeep,bringstool boxfrom Jeep, repairs thelatch,goestohisroomandstartedsnoring!!!!

3 ) F R E S H J U N I O R E N G I N E E R

(ELECTRICAL)

Then PM sent one fresh young ElectricalEngineer for site investigations. His Jeepalso broke down while returning at night.He landed up at one lone lady's place whoreadily agreed to provide shelter for thisy o un g E le c t ri c al E n gi n ee r a nd

accommodatedhiminGuestroom.Around midnight, the lady takes out fusefrom the main switch. There was totaldarkness all around. Shewaitedfor an hourfor something to happen but whennothing happened, she entered Guestroom with a pillow and blanketin her handand wakes up Electrical Engineer and said,“ It appears there is power break-down.

There is total darkness all around. I amafraidof darkness….”

Unableto understand herstatement or heraction, still clueless, Electrical Eng. ;

rubbing his eyes, gets up, locates mainswitch board, replaces fuse, escorts thelady back to her room, switches on nightlamp for her, comes to Guest room andwenttodeepsleep!!!!

4) SITEACCOUNTANT

Then PM sent one young Site Accountantfor site investigations. His Jeep also brokedownwhilereturningatnight.

In search of a shelter for a night, he went tooneplaceand requestedfor onenightstay.

The owner said, " I am sorry, I can't

accommodate you. We have youngdaughtersinourhouse."

Hegotsimilaranswersatnexttwoplaces.

Frustrated, he thought he should now

search a house in this village where therearenodaughters.

In order to cut short conversation, at next

place he asked the owner, "Are there any

youngdaughtersinthishouse?”

Ownerasked,"Why?”

The Accountant replied, " I want to sleep

hereforonenight!!!!"

( For several months after this incidence,

the Accountant could not walk nor he

couldsignvoucherswithhishand!)

5)VETERANSTOREKEEPER Then PM sent veteran Storekeeper for siteinvestigations. His Jeepalso brokedown at

night while returning. He located a

"suitable" accommodation for himself. He

liked this so much that he decided to

extend his stay and to inform his wife he

sent a cryptic telegram: " Busy buying. Will

return home Friday " but packed off

immediately and rushed back home when

he received a returntelegram from hiswife

reading : " I leave it to you when to return

which you decide yourself but come

before I start selling what you are buying

!!!!"

(Ingoodoldendaystherewerenocadresof

Purchasers and Storekeepers were used to

b u y m a t e r i a l s a l s o a p a r t f r o m

storekeeping.)

6)VETARANSr.CIVILFOREMAN

Then PM sent one veteran Sr. Civil Foreman

for site investigations. His Jeep also broke

downwhilereturningatnight.Helocateda

Doctor’s place who was on night duty.

Doctor’s wife readily agreed to provide

shelter for him. The Forman introduced

himself, made himself comfortable and

explained the importance of profession of

Foremen,habits of Foremen etc. etc. to the

lady.

Unexpectedly Doctor arrived from night

duty early. He saw an unknown person in

his bedroom. Furious, he reached out to

his drawer for pistol. Shocked by this his

wife yelled, “ Behave yourself ! Don’t

behave irrationally ! If everyone starts

behaving irrationally like you, very soon

country will lose many Foremen !!!! Do youknow Foremen are real craftsmen and as it

is their category is depleting very rapidly

!!!!”


15/20

7)PROJECTMANAGER

T h e n P M h i m s e l f w e n t f o r s i t einvestigations. HisJeep also broke down atnight while returning. He located a placewhere lady's husband happened to be afrequent traveler Civil Engineer andwas ontouronthatday.

Around midnight, unexpectedly lady's

husband arrived from tour. He saw astrange person in his bedroom. Furious, hetook out his pistol, loadedit and pointed atPM but when he was about to pull trigger,his wife fell on her knees and pleaded, "Please, please..; dear, don't killhim beforehewritesaMethodStatement .....!!!!!"

8) VETERAN AREA MANAGER FROM

REGIONALOFFICE

Then veteran Area Manager from RegionalOffice thought he shouldalso carry outsiteinvestigations-thisbeingmajorWIVJob.

Being senior citizen, he was alwaystravelling with his wife whom he married

thirty years ago. He had met her at his firstposting at job site and could marry herafteralongcourtingperiod.TheirJeepalsobroke down at night while returning. Insearch of a shelter for a night they landedup in a place - the location of whichresembled to their first site where they

spentlotoftimecourtingwitheachother.After dinner, while sitting in verandah, hiswife going down memory lane, startedrecollecting those golden moments theysharedduring those beautifuldays of theircourtship.

She asked, "Do you remember - we were

used to sit in verandah like this and youwereusedtoholdmyhand?”

Area Manager said, " Yes, I do remember "and he reached over to her and held herhand.

Then she said, " Do you remember - youwereusedtokissmeonmyforehead?"

Area Manager, nodding affirmatively,

leaned over and kissed her on herforehead.

Going furtherdown memory lane she said," Do you remember - you were used to bitemeonmyneck?

Area Manager again nodded affirmativelybutimmediately gotup.

She asked, " What happened? Where areyougoing?"

Area Manager replied, " Just a moment,please. Let me bring my teeth lying ondiningtable!!!!”

9) GENERAL MANAGER (TENDERING)FROMHO

Then GM ( Tendering) from HO thought of getting first hand feel of site beforepreparing the Tender. His Jeep also broke

down whilereturning at night. In search of ashelterforanight,helandedupinaplacewhere a lady was staying alone. She readilyagreed to give shelter. In absence of extrabed they had no option but to share thebed.Heoccupiedrightsideofthebed.

After some time the lady started droppinghints after hints but in vain. So ultimatelyshe said,“ I am uncomfortable on left sideas I am used to sleep on right side. You rollover me, I roll under you and we tradesides.”

Noresponse.

Impatient now, she reframed her proposal,“Ok,listen.Irolloveryou,yourollundermeandwetradesides.”

Noresponse.

Loosing hopes, finally she said, “ I don’tthinkyouunderstandwhatIreallywant.”

Breaking his silence, GM said, “ I know. Iknow….. Let me tell you, when I was small,mybrotherwasusedtoplaythiswithmetotake possession of full bed. I know that youwantme toget upso thatyoucan occupyfull bed but be informed that I am notgoing to allow this to happen at any cost !!!YouknowI ammatured now and nolongera small child that I don’t understand yourhiddenagendaandintentions!!!”

10)CONTRACTSMANAGERFROMHO

Then Contracts Manager from HO thoughthe should also conduct site investigationsas he would not like this prestigious job togo in the hands of competitors. His Jeepalso broke down while returning at night.In search of a shelter, he landed up in aplace where a lady was staying alone. Sheagreed to give shelter but said she has noextra room. Since it was almost midnight

and difficult to search other place,Contracts Manager reluctantly decided tos t ay t h er e b ut h e b e ca m e r e a l lyuncomfortable when he saw that herroom was too small and neither there wassecondbednoranyplaceonfloortosleep.

But reconciling to this, he asked her , " Doyouhavesomeextrapillows?”

The lady started wondering about hispurpose of asking for extra pillows but shereplied,"Yes,Idohave"andgavehimthreeextrapillows.

ContractsManager placedthese pillowson

bed in a row and created a sort of partitionon bed bifurcating space for him on oneside and for the lady on the other side of row of pillows and slept in his portion of bed.

In the morning, on the breakfast table, theladyasked;"Whatexactlyyoudo?”

Contracts Manager replied, " I am CivilEngineer, specialized in Bridges. In yourvillage new major bridge is coming up. We

are going to submit tender for this bridge. Iam here to do pre-tender reconnaissancesurvey and to decide strategy to completethisbridgeinavailablecontractperiod."

The lady said, " I don't think you can bridgethisriverinavailabletime."

Furious the Contracts Manager said, " Whatdo you mean when you say I can't bridget h i s r i v e r ? D o y o u k n o w , I a minternationally renowned Bridge expertwithseveralAwardstomycredit?”

The lady coolly replied, " May be.”

The Contracts Manager said, “ What maybe? It is a fact. I am respected all over thecountry and also internationally in civilengineering fraternity for my expertise inbridge engineering.”

She again said, “ May be but I am prettysureyoucan'tevencrossthisriver–whattotalkofbridgingit."

By now the ContractsManager was boilingwith anger. Red faced he asked her, " Whatmakes you think so and that too with somuchconviction?"

The lady replied, " Whole night was

available to you but you could not crosseven three pillows and you expect me tobelieve that you will built a bridge forcrossingsuchmightyriver?!!!”

11) DIRECTOR

Then Director thought he should alsoinvestigate site – this being vital job for theCompany.His Jeep also broke down in thenight while returning. In search of a shelterforanight,he.......................................

PS : All the generic characters portrayed in this

H u m o u r a r t i c l e a r e fictitious. Resemblance to any person- living or dead is purely coincidental nor frequent break-down of Jeep reflects in anyway on the manufacturer of theJeep nor on performance of Plant Departmentwhomaintain it nor lack of “practical” knowledge among fresh g r a d u a t e s r e f l e c t o n country’s education system nor this is intended to label site staff or HO staff in any particular category.


16/20

WORKS IN PROGRESS

275m Chimney at Sagardighi, West Bengal

IDCT- Opal, Dahej, Gujarat

CLC at Bramhaputra Bridge, AssamWazirabad Flyover, New Delhi

Sagarkatte Bridge, Karnataka

Elevated Water Tank, Rajasthan


17/20

NEWS FLASH

1.FoundationStoneLaying

Hon’bleMinister for RoadTransport andHighways Shri. Nitin Gadkariji laidFoundation Stone for 5km-long four-lane road from Varnapuri to Mormugaoharbor including the 3.2km-longflyover. Also present were, Hon’bleMinister of Defence, Shri. ManoharParrikar, Hon’ble Chief Minister of GoaShri. Laxmikant Parsekar, Hon’bleMinister of PWD, Goa Shri. SudinDhaval ikar, and other CabinateMinistersofGoa.

While talking to media persons, Hon’bleP W D M i n i s te r S h r i . D h a v l i k arannounced that, this Rs. 550 croreprojecthasalreadybeentendered.

2.CourtesyVisit

Mr. P. S. Raizada & Mr. Arvind SinghfromDelhi office, made a courtesy visit toHon’ble Minister for Law & Justice – Mr.SadanandGowdaonhisBirthDay.

3. Green Initiative at CMRL Project

Site

Mr Veeraraghavan, working at ourCMRL Package is a committed soldierfor environment Protection. Withan outof box thinking, he moved from pillar topost at CMRL Projectsite to collect1200KGof waste paper and deposited it with

ITC (Paper and card Board Division)under the Gammon Banner. It was notan easy task but with positive and anenviable quality of patience in him, he

sustained his efforts to accomplish histask.

By this initiative he has preventedcutting of 30 trees. A Green InitiativeCertificate issued by the ITC will beartestimony of the Green approach of theCMRLProjectaswellasGammon.

We place on record our appreciation toVeeraraghavan.

4.NationalSafetyDay

Gammon Celebrated National SafetyDay on March 4; 2015. The theme for2015 was ‘Build a Safety Culture forSustainable Supply Chain’.

Various activities, games and eventswere organized across various sites andoffices for the celebrations andspreading awareness across all theworkingpartners.

5.CompletionofShell

Gammon’s Raigarh NDCT team hassuccessfully completed concreting of 4th- 155m tall Natural Draught Cooling

Tower Shell at Raigarh for Jindal PowerLimited on 31st March 2015. The shellwas completed in a record time of 5Months25daysfromRingBeamleveltotop level with remarkable Quality,Safety & accuracy in Shell Profile.Battery of 4 Nos. 155 m tall ND coolingtowers has completely changed skylineofRaigarh.

6.RCDRigatSignatureBridge

As an addition to the Gammon’sEquipment Bank, a RCD Rig (Make:BUMA Korea, Model: R1820, Torque:

17.9 t-m) has been commissioned forspecialized Piling activity at P23FoundationofSignatureBridge,Delhi.


18/20

COMPANY NEWS

LECTURES

DELIVERED

Dr.N.V.Nayak

January23;2015

“Redevelopment of Buildings”, attwoday Work shop cum Seminar at VJTI,Mumbai.

March14;2015

“Sustainability of Concrete”, duringone day seminar organized by ASCE IS

WR on theme "VISION 2020- SMARTC I T I E S & S U S T A I N A B L EINFRASTRUCTURE".

Mr.AnupamDas

May9;2015

“Well foundation Construction-

Caisson foundation & Cutting edge

construction - new initiatives

adopted at Bogibeel Bridge” at two-day National Seminar-cum-WorkshopatTezpurUniversity

Mr.BhaveshThakkar

March28-29,2015Participated in PMI- Asia PacificLeadership Institute Meeting held atBali,Indonesia.

GIL

PARTICIPATION

IN SEMINARS

Dr.N.V.Nayak

March20;2015

ParticipatedinaSeminaratIIT,Mumbai.

M/s.V.S. Chako & BibinDhas

February26,2015,

Participated in workshop on IndustrialEngineering & Recent Industry Basedtechniques for Civil Engineerings t u d e n ts o r g a n iz e d b y R a j a sEngineering College, Tamilnadu anddelivered lectures on “Challenges &Opportunities for a Civil Engineer inIndustrial Engineering” & “ConstructionandProcessofaThermalPowerplant.”

AWARDS

1. Mr. Umakant Kulkarni was conferredwith prestigious ‘Achiever Award’ byHon’ble Chief Minister of Bihar onbehalf of BSRDC for his contributiontowards implementation of AIIMS –

DighaElevatedCorridor.

2. Mr. Anupam Das was conferred withPrestigious ‘Maharashtra PWD Medal

for the Best Paper on Construction’ byIndian Road Congress for his paper“Case Study on New Initiatives taken onCaisson Foundations and Cutting EdgeConstruction at Bogibeel Bridge”. Thepaper wasprinted in IRC Journal Vol.74-3(October-December,2013).

THANKS TO

ESTEEMED

CUSTOMERS

Channelization of Gomti river byDepartment of Irrigation & Water

Resources, Uttar PradeshRs. 516.73 crores

WELCOME TO

GAMMON FAMILY

GENERAL MANAGER

Anand Vijayaraghavan

DEPUTY GENERAL MANAGER

J N Chandrasekhara

Devendra Verma

Somarao kulkarni

Tirumala Rao Tripuraneni

MANAGER

Chandra Bhushan Singh

C. P. Kumaravelu

Jayanta Saha

Mohammed ammarul Haque

DEPUTY MANAGER

Anil Kumar Annavarapu

Pankaj Kumar

Sunil Kumar Singh

Vivek Kumar Sharma

Srinivasulu Reddy

Parthapratim Tripath

Abhishek Jaiswal

Vishal Choubey

Korada Venkata Ramana

Anantha Kini

kinjal Chakraborty

Quamruddin

Prabhakaran Ramanathan


19/20

3. On the occasion of“World Safety andHealth Day” held on 7th April 2015,Mi ni st r y Of L abo ur a nd H umanResources, Royal Govt of Bhutanhonored Gammon’s PunatsangchhuHEP Project – I & I I with “SafetyRecognition Certificate” for adoptingGood Occupational Health and SafetyPracticesatworkplace.

The certificate of award was given bySri. Dasho Pema Wangda, Hon’ble

Secretary of Ministry of Labour and

Human Resources, Royal Govt. of

Bhutan.

5. Corporate Safety Committee hasimmense pleasure in announcing theresult of the CMD Safety Shield for2013-14asbelow:

1.Signature Bridge - Winner2.Jindal CivilWorks - 1stRunner up3.NathaniHeights - 2nd Runnerup

Congratulations to Winner & Runner

ups!

STAFF RECOGNITIONS

Mr. Nandkumar Ghawalkar, Asst.

Manager – HO (SMS), participated andcompleted Nagtibba snow trekkingexpedition at Garhwal – Uttarakhandorganized by Society for Trekking &Environmental Preservation New Delhi.It was Six day trek of 35 participantsfrom various parts of country. The firstthree days involved rocky mountain of Himachal Pradesh & last three daysinvolved trekking through Snow at thetemperatureof - 60C.

FAMILY RECOGNITIONS

Chi. Omkar Rajput, son of Mr. MeghrajRajput (HO–Purchase) has secured aSILVER MEDAL with his outstandingperformance in the National Jeet Kune

Do championship tournament amidstcompetition from participants of thevariousstatesofIndia.

Jeet Kune Do is a very ancient gameplayed and developed in USA inspired

COMMITTEE

REPRESENTATIONS

Secretary General of Indian RoadCongress has nominated followingG a m m o n i t e s i n r e c o n s t it u t e dCommittee.

B-7Committee

Mr. P. S.Raizada –ConvenorMr. M.V. Jatkar – MemberSecretaryMr. Arvind Singh – MemberMr.ArvindTingloo –Member

BSSCommittee

MrVNHeggadeB3 Committee

Dr. N.V. Nayak Mr. R. Prakash

BEREAVEMENT

Madam Katy N Popat, SeniorStenographer expired on March 3;2015attheageof71.

Madam Popat joined Gammon inJ a nu a r y 1 9 66 a n d r e ce n t lyc o mp l e te d h e r 4 8 t h y e ar o f continues service. During her longtenure at HO, she worked in various

departments. She will always befondly remembered in Gammon byoneandall.

MAYHERSOULRESTINPEACE.

4. Gammon’s KOSI BRIDGE PROJECTwas conferred with Prestigious ‘CIDCVishwakarma Award – 2015’ under thecategory of Best Construction Projectby Construction Industry DevelopmentCouncil(CIDC).

by world famous karate fighter BruceLee.

Chi. Omkarhad won 8 gold, 5 silver and1 bronze medal in his sporting career in

thisgametillnow.


20/20

India’s first being constructed by Gammon across Yamuna river at Wazirabad,“Signature Bridge” promises to be a great tourist attraction of Delhi, the Capital of India. This cable-stayed bridge will

link NH-1 at Wazirabad on Western bank and at Khajuri Khas on eastern bank of the river Yamuna,

connecting North Delhi with East Delhi.

With a length of about 575 m (main bridge) +100 m extension and a height of 154 m, with glass

facade at top part, the proposed would have a bow-shaped steel pylon in theSignature Bridge middle. Two high towers will provide double cable support in the inner periphery of the carriageway.

The deck will be composite (steel and concrete) while the pylon will be in steel.

Equipped with four lanes, this engineering masterpiece will have a 1.2 m wide central verge, space

for anchoring cables, maintenance walkway and crash barrier on either side of the central verge.

Once operational the will dramatically improve access between North and WestSignature Bridge Delhi reducing present congestion and traffic jams and will become the identity of Capital City – the

way Taj Mahal is toAgra

“ ignature ridge”

ignature ridge

ignature ridge

- THE ACROSS YAMUNA RIVER AT DELHI

Documents

Gammon Bulletin JAN_JUNE2015