Upload
amit-kumar-tiwari
View
114
Download
4
Embed Size (px)
Citation preview
PRESENTED BY :AMIT KUMAR (1303200018)
ANIMESH RANJAN (1303200023)
CIVIL DEPARTMENT, 4TH YEARABES ENGINEERING COLLEGE
CONSTRUCTION OF METRO STATION
CONTENT: INTRODUCTION TO PROJECT CC-27 TENDERING FOR THE PROJECT BORE HOLE RESULTS VASANT VIHAR STRUCTURE LAY OUT BOTTOM-UP CONSTRUCTION EXCAVATION/SOIL STABILIZATION CONCRETING OPERATION& REPAIR WATERPROOFING OF STRUCTURE
PROJECT NAME-DESIGN AND CONSTRUCTION OF TUNNEL & UNDERGROUND METRO STATIONS FROM JANAKPURI WEST TO BOTANICAL GARDEN(CC-27)
KEY DETAILS
COST OF PROJECT(App) INR 1435 CRORESCOMPLETION PERIOD(Expected)
42 MONTHS
TENDER SECURITY AMOUNT INR 14.35 CRORESTENDERING AGENCY DMRCTENDER GIVEN TO L&TQuoted Price & Final Price 1265 CRORES
PROPOSED ROUTE MAP FOR CC-27
BORE HOLE DATA-BEFORE STARTING CONSTRUCTION GEOTECHNICAL DATA WAS COLLECTED FROM VARIOUS LOCATIONS ALONG THE PROPOSED ROUTE TO KNOW ABOUT SOIL CHARACTERISTICS.-BORE HOLES WERE MADE ALONG THE PROPOSED ROUTE UP TO A DEPTH OF 30M BELOW THE EXISTING GROUND LEVEL.
NEXT IMAGE SHOWS THE SOIL STRATA AVAILABLE AT VARIOUS SECTIONS OF THE PROJECT.
BORE HOLE
61
BORE HOLE
35
BASED ON THE SAMPLES OBTAINED FROM THE BORE HOLES FOLLOWING TESTS WERE CONDUCTED
ON THE SAMPLES-FOLLOWING TESTS WERE THEN PERFORMED ON THE COLLECTED SAMPLES-• SIEVE ANALYSIS.• HYDROMETER TESTING• MOISTURE CONTENT• SPECIFIC GRAVITY • DRY DENSITY• ATTERBERGS LIMIT• TRIAXIAL SHEAR TEST(UU, CU, CD)• CONSOLIDATION TEST• DIRECT SHEAR TEST• CHEMICAL ANALYSIS OF BOTH SOIL AND WATER SAMPLE
THE COLLECTED ROCK CORE SAMPLES(VASANT VIHAR SITE) WERE TAKEN AND THE FOLLOWING TESTS WERE CONDUCTED ON THEM-• DENSITY TEST• WATER ABSORPTION& POROSITY• HARDNESS• UNCONFINED COMPRESSION TEST• POINT LOAD INDEX
• VASANT VIHAR-HARD ROCK STRATA (BOTTOM-UP CONSTRUCTION APPROACH)
• HAUZ KHAS - SOFT SOIL STRATA(TOP-BOTTOM CONSTRUCTION APPROACH)
VASANT VIHAR STATION
TOP VIEW – VASANT VIHAR
METHOD OF CONSTRUCTION- BOTTOM UP CONSTRUCTION
EAST SIDE WEST SIDE
ROOF SLAB
CONCOURSE SLAB
BASE SLAB
1
2
3
4
5
6
78
1 BLOCK WORK
2 UPE(UNDER PLATFORM
EXHAUST)
3 OTE(OVER TRACK EXHAUST)
4 PLATFORM SLAB
5 FRESH AIR DUCT(ROOF SLAB)
6 SCUPPER DRAIN(BEHIND BW)
7 FALSE CEILING BELOW
CONCOURSE
8 COLUMN
9 RETAINING WALL
CROSS SECTIONAL VIEW VASANT VIHAR
9
BLOCK WORK INFRONT OF RETAINING WALL
Dimension of Block– 400*200*200Mortar-Cement sand mortar with ratio 1:4Block Strength- 7.5 N/mm2 MIX –M15Thickness of the bond-10mmJoint Type-Basic English Bond(1 block thick)
CONCOURSE SLAB
ROOF SLAB
BLOCK WORK IN FRONT OF
RETAINING WALLRETAINING
WALL
INITIAL LAYER OF BLOCK WORK
UPE(UNDER PLATFORM EXHAUST)
BASE SLAB
UPE CUTOUT
PLATFORM SLAB
UNDER PLATFROM EXHAUST
(UNDER PLATFROM EXHAUST ) are basically cut outs provided below the platform slab
OTE(OVER TRACK EXHAUST)
COOLING MECHANISM OF OTE
OTE LIFTING
FRESH AIR DUCTS
VENTILATION SYSTEMS PROVIDED BELOW THE ROOF SLAB FOR A CONSTANT SUPPLY OF FRESH AIR.
ROOF SLAB
FALSE CEILING
FACTORS THAT DETERMINE THE CONSTRUCTION APPROACH ARE:
• SOIL PROFILE- AS SUGGESTED BY THE GEOTECHNICAL INVESTIGATION.
• SITE LOCATION-WEATHER THE SITE IS LOCATED IN AN ISOLATED ENVIRONMENT OR URBAN DWELLINGS.
• SURROUNDING ENVIRONMENT-WEATHER THE SURROUNDING ENVIRONMENT CONSISTS OF EXISTING STRUCTURES AND ROAD NETWORKS.
• TIME CONSTRAIN-THE TOTAL TIME AVAILABLE FOR COMPLETION OF PROJECT.
• AVAILABILITY OF MATERIAL-THE AVAILABILITY OF MATERIAL FOR FILLING AND CONSTRUCTION ACTIVITIES TO BE CARRIED OUT
VASANT VIHAR STATION
Area-33,706 sqm
HAUZ KHAS STATION
Area- 15,533.69sqm
BOTTOM UP CONSTRUCTION
METHOD(VASANT VIHAR)BOTTOM UP CONSTRUCTION INVOLVES EXCAVATION & SOIL
STABILIZATION CONSTRUCTION OF BASE
SLAB, CONCOURSE SLAB & ROOF SLAB
CONSTRUCTION OF COLUMNS AND RETAINING WALL. WATERPROOFING OF
STRUCTURE FILLING OPERATIONS
EXCAVATION
• EXCAVATION ON SITE WAS CARRIED OUT ACCORDING TO IS 3764:1992.• EXCAVATION CAN BE DONE IN MANY WAYS DEPENDING ON THE SOIL
PROFILE IN OUR CASE IT WAS DONE USING BREAKERS AND EXCAVATORS. • EXCAVATION VOLUME= 18*265*26=124020 CUM(LUMP SUM)
MACHINERY USED IN EXCAVATION
EXCAVATORS HYDRAULIC 220 EXCAVATOR HYDRAULIC 210 EXCAVATOR HYDRAULIC 215 EXCAVATORBREAKERS HYDRAULIC 340 BREAKER HYDRAULIC 210 BREAKER
HEAD ATTACHMENT FOR BREAKER
SLOPE/SOIL STABILIZATION
SOLDIER PILLING
SHOT CRETING
Shot Creting is done according to IS 9012:1978(reaffirmed 2002)
Mix- 1:3 To 1:5 is used depending upon surface . W/c is kept at .30-.35
Plasticizer -6% wt of cement( Glenium sky 777)
Operating temp- 5deg to 30deg Celsius
Mesh Dia- 4mm
Mesh overlap length- 300mm
Min area for applying-300mm*300mm
PROCEDURE FOR SHOTCRETING 1)CLEAN THE SURFACE OFF THE LOOSE MATERIAL AND THEN CLEAN WITH AIR COMPRESSOR.2) APPLY A LAYER OF SHORTCRETE TO THE SURFACE AND WAIT FOR IT TO CURE.3) APPLY THE WIRE MESH ON THE SURFACE AND BIND IT TO THE SURFACE USING REINFORCEMENTS.4) NOW APPLY THE SECOND LAYER OF THE SHORTCRETE ON THE SURFACE . KEEP THE NOZZLE PERPENDICULAR AT A DISTANCE OF 1 TO 1.4 M AWAY FORM SURFACE.Mechanism for Dry- Mix shot creting
CONSTRUCTION OF BASE SLABS
-M40 Grade Concrete was used-Reinforcement conforming to FE500D shall be used on site.-Water Stops –PVC water stop will be used to arrest the water leakage (at construction joints)-Binding wire used for binding reinforcement has a core dia of 1.25mm-Formwork ply 12mm thick coated with Formwork oil for easy removal of formwork-Cover blocks should be used depending on clearance that needs to be provided to the reinforcement(50mm Base slab)-Vibrator of 60mm Dia 4nos.
CONCRETING OPERATIONS
Earth Compactor Concreting on site
Proper vibration should be provided in order to avoid cold
joints
• AFTER THE FINAL SET HAS TAKEN PLACE WET HESSIAN CLOTH SHALL BE PLACED AND COVERED BY POLYTHENE SHEET.
• THE HESSIAN CLOTH SHALL BE KEPT PERMANENTLY DAMP
• AFTER 24HOURS HESSIAN CLOTH AND THE POLYTHENE SHEET SHALL BE REMOVED AND THE AREA WOULD BE
• PONDED WITH WATER .
• FOR VERTICAL CURING THE HESSIAN CLOTH ALONG WITH POLYTHENE SHEET SHALL SECURE THE SURFACE FOR AT LEASDAYS BEFORE
• NEXT VERTICAL POURING BEGINS. THE HESSIAN CLOTH SHOULD BE DAMP ALL THE TIME.
CONCOURSE SLAB
Concrtete-M405.25 m below roof level Thickness- 550mm
Formwork & scaffolding for Concourse slab
ROOF SLAB
Sealing Of construction Joints on roof slab
Cut Outs of the roof Slab( Satellite view)
Design Mix M-40Thickness-1.8mRoof level
MIX DESIGN OF CONCRETE M 40 MATERIAL QUANTIY(KG) TYPE
CEMENT 380 ULTRA TECH(OPC 53
GRADE)FLYASH 80 Ashtech:IS3812(NTPC
BADARPUR)AGGREGATE(10mm) 481 KotpultiAGGREGATE(20mm) 666 KotpultiRIVER SAND 677 Yamuna NagarW/C RATIO .35 ADMIXTURE @ .85% 3.91 Glenium
147,Suretec(BASF)W/P CAMPOunds@1%
4.6 MasterPel 760(BASF)
WATER 161 R.O Water at Batching Plant
Following admixture were usedMasterglenium 147 provides Extended workability Providing the ultimate high strength, especially ready.ApplicationAdd to the mixture 80% -90% of the calculated water for the concrete mix and then, with the remaining water masterglenium 147 must be added to the mixture,
Water Proofing Campound used-Masterpel 760 Provides resistance to water penetration either under
hydrostatic pressure or capillary absorption. Imparts integral water tightness to structures.ApplicationMasterPel 760 is a ready-to-use powder which is dispensed into the concrete together with the cement.
M-40 has been used for 3 slabs and retaining walls
MIX DESIGN M-50 MATERIAL
QUANTIY(KG) TYPE
CEMENT 410 ULTRA TECH(OPC 53 GRADE)
MICRO SILICA 22 TAM CEMAGGREGATE(10mm)
457 Kotpulti
AGGREGATE(20mm)
686 Kotpulti
RIVER SAND 765 Yamuna NagarW/C RATIO .37
ADMIXTURE @ .85%
2.16 Glenium sky 777
WATER 151 R.O Water at Batching Plant
M 50 was used for concreting of columns
MasterGlenium SKY 8777 is the super plasticizer based on second generation
polycarboxylic ether polymers, developed using nano-technology. The product has been primarily developed for
applications in high performance ready-mix concrete to facilitate
Capability of delivering high quality concrete at any time to the job site in place.
Tam CemTamCem Micro Silica is composed of silicon dioxide (5i02).Collected from silicon metal and ferrosilicon.
TamCem Micro Silica will react with the Calcium Hydroxide from the cement, which will form more of the
Calcium Silicate hydrate, increasing the strength of the concrete.
MACHINERY USED FOR CONCRETING
Volume-6cum but loaded up to 5-5.5cum.Rotations –Depend upon distance and Mix
BOOM PLACER
Concrete Bucket Vol 1-1.2cum
CONCRETING THROUGH PIPES
CONCRETE REPAIRING
BULGED CONCRETE
Bulged Concrete – Bulging in concrete takes place due to displacement of formwork.
Surface preparation: The bulged area on concrete surface shall be hacked with chisel to required line, level. All dirt, dust shall be cleaned with brush and water.
Repairing: Hacked area will be patched up with cement: sand mortar of proportion 1:4. On the completion of patch up work, the exposed area shall be thoroughly cured.
Grout Loss
Exposed aggregate surface created by exit of cement slurry/grout mortar from the gaps of formwork due to excessive vibration, unsealed joint of formwork during pouring of concrete.Repair -The concrete surface is cleaned and free from dust/oil/grease etc by using broom or wire mesh by scrubbing vigorously.-After removal of loose particles surface is washed with water.-Patch-up is done at cleaned surface with non-shrink Grout conbextra GP2
IT IS DUE SEGREGATION OF AGGREGATES AND MORTAR INTO THE
CONCRETE. HONEYCOMB CREATES IN STRUCTURES DUE TO MAINLY IMPROPER COMPACTION IN TERMS OF EXCESSIVE/INSUFFICIENT
VIBRATION AT THE TIME OF PLACING.
Minor Honey Combing
Major Honeycombing
Repairing Involves-The loose aggregate that are exposed shall be removed by gently tapping on it. After removal of all loose aggregate, dust, dirt etc.
by wire/Soft brush then surface will be cleaned with Water. Patchup is done by using conbextra GP2/Rendroc which is mixed
with cement and then the paste is applied.
WATERPROOFING OF STRUCTURE
CHEMICALS USED FOR WATERPROOFING
-FOR PRIMING PURPOSE
MASTER SEAL M2525(PROVIDED IN TWO COMPONENT A & B)
-WATERPROOFING LAYER
MASTER SEAL M800(PROVIDED IN TWO COMPONENT A & B)
MASTER SEAL M800
A HIGHLY ELASTIC, SOLVENT FREE, ULTRA-FAST CURING, SPRAY APPLIED POLYURETHANE COATING AND IT IS USED IN WATERPROOFING APPLICATIONS. MASTER SEAL M800 IS A SOLVENT FREE, TWO COMPONENT SUBSTANCE. IT IS A HIGHLY REACTIVE TWO COMPONENT MIXTURE USED FOR WATERPROOFING IN TUNNELING AND CUT & COVER STATIONS
USES-
WATERPROOFING COMPOUND WITH A SETTING TIME OF 2-3SECONDS
STEP WISE PROCESS FOR WATERPROOFING.
-SURFACE CONDITIONS
THE RCC SURFACE SHALL BE DRY BEFORE WATERPROOFING.
ANY INGRESS FOR WATER SEEPAGE SHALL BE IDENTIFIED AND TREATED.
CONSTRUCTION JOINT SHALL BE FILLED WITH HIGH PERFORMANCE WATER STOP GROUT OF CRYSTALLINE GROWTH.
MIXING
• APPLICATION OF PRIMER INVOLVES MIXING OF COMPONENT A AND B AND APPLICATION ON THE SURFACE AS SHOWN
MIXING OF A & B
-Thin coat of mixed primer (RESIN + HARDNER) on the surface shall be mechanically & uniformly applied, ensuring continuous film soon after surface preparation is complete.-Moisture content in the substrate shall be less than 5 %.-The drying period of primer depends on the ambient temperature and relative humidity.
Checking moisture before application of primer.
BASF AGGREGATESBASF AGGREGATES are sprinkled over the primer layer
immediately after application of the primer. Aggregates help in roughening the surface of primer for proper
bonding between the primer layer and the waterproofing membrane layer.
Application of the water proofing Layer with 2 component gun
Special 2 Component gun used for applying waterproofing campound
-MasterSeal M800 is available with the Part A coloured white and the Part B colored black.
-This results in a uniform grey colour of the sprayed material thus giving the sprayer a visual control of the quality of the mixing, and machine faults become immediately obvious. If the membrane colour changes, stop spraying and check machine .
-MasterSeal M800 is normally applied at 1.5–2.0kg/SQM this corresponds to a thickness of 1.5–2.0mm.
Ponding test
PROTECTIVE COVERING TO WATERPROOFING MEMBRANE
THANK YOU!!!