Planning & Construction of Hydro Projects,OCT,08

7/31/2019 Planning & Construction of Hydro Projects,OCT,08

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Basis components of hydro projects

Diversion Structure-Dam/ Barrage/ Weir/

Trench Weir Feeder channel, Trash racks, Intake gates

Power Intakes, Desilting Tanks/ Chambers/

basin, Spilling arrangements Power channel, Forebay tanks, Head Race

Tunnel

Surge Shaft, Pressure shaft, Penstocks,Power house, Transformer Hall

Draft tube, Tail Race Tunnel/ Channel,

Construction adits & permanent adits


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LAYOUT OF HYDRO PROJECTS


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Corporate centre


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IRIGATION CANAL

CANAL FALL POWER HOUSE

INTAKE

CANAL FALL

POWER HOUSE

TAIL RACE

CHANNEL


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POWER CHANNEL DEVELOPMENT

FALL

DIVERSION STUCTUREPOWER INTAKE

TAIL RACE

POOL

RIVER

POWER CHANNEL

FOREBAY PENSTOCK

POWERHOUSE


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POWER TUNNEL DEVELOPMENT

FALL

DIVERSION STUCTUREPOWER INTAKE

HEADRACE

TUNNEL

TAILRACE

POOL

POWERHOUSE

RIVER

SURGESHAFT


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U/S AND D/S SURGE TANK SYSTEM

UNDERGROUND POWER HOUSE

AIR VENT

DOWNSTREAM

SURGE SHAFT

PRESSURE SHAFT

STEADY STATE LEVEL

UPSTREAM SURGE SHAFT

TAILRACE TUNNEL

HYDROSTATIC LEVEL

LOW PRESSURE

CONDUIT

RESER-

VOIR


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ACCESSSHAFTDAM

RIVER

SURGECHAMBER

TAIL RACETUNNEL

UNDERGROUNDMACHINEHALL

UPSTREAM STATION ARRANGEMENT

(SWEDISH SYSTEM)


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PRESSURE TUNNEL

PRESSURE SHAFT

EXCAVATED SURGE TANK

TURBINE

TAILRACE

MIN SURGE LEVEL

INTAKE

SURGE TANK

MAX SURGE LEVEL

MAIN INLETVALVE

GATE GROOVE

STEADY STATE LEVEL

RESERVOIR


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INVESTIGATION & PROJECT

FORMULATION STAGES


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FR/ DPR

GEO-TECHNICAL

INVESTIGATION

PROJECT

OPTIMIZTION

CONSTRUCTIONMATERIAL SURVEY

EIA

STUDIES

SEISIMIC

STUDIES

TRANSPORTATION

STUDY

TOPOGRAPHICAL

SURVEY

DISASTER

MANAGEMENT

STUDIES

SOCIO-ECONOMICSTUDIES

HYDROLOGICALSTUDY

STUDIES AND INVESTIGATIONS


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PROJECT FORMULATION STAGES


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PPROACH ROADS, LAND, QUARRY SITES, DUMPING AREAS,

TEMPORARY INSTALLATION SERVICES LIKE CAMP OFFICE,FIELD HOSTEL, GUEST HOUSE, FAMILY QUARTERS FOROFFICERS & STAFF, MAIN OFFICE, WORKSHOPS, DG POWERGENERATING SETS, MAIN STORES, GARRAGE, COMPRESSORSTATIONS, DISPENSARY, SECURITY STAFF

COMMUNICATION FACILITIES

AGGREGATE PROCESSING PLANT (APP),CONCRETE BATCHING PLANT (CBP)QUALITY CONTROL LAB

AREA FOR PROCESSING FILL MATERIALSTORES FOR BLASTING MATERIAL

WATER SUPPLY & SEWERAGE DISPOSAL SYSTEM

CONSTRUCTION EQUIPMENTS

INFRASTRUCTURAL FACILITIES REQUIRED


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General layout of facilities & installations


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Construction Materials

OPC to be used for shotcrete & grouting and PPC to beused for concreting & masonry.

Steel to be sourced from reputed Suppliers like SAIL,TISCO, RIL etc. confirming to the provisions of the

document. Structural Steel to be sourced from reputed Suppliers like

SAIL, TISCO, RIL etc. confirming to the provisions of thedocument.

Material available from under ground excavation foraggregates.


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PLANNING OF HYDRO PROJECTS


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CONSTRUCTION PROGRAMME

Major Activities StartMonth

EndMonth

Months

0 10 20 30 40

LOI & Mobilization 1 6

Barrage 3 38

Intake Pool

13 38Power Intake 13 25

Desilting Chamber 3 39

Gate shaft DC &SFT 3 25Silt Flushing Tunnel 4 35

GROUTING ANDPLUGING 25 40


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Construction EquipmentsS. No. Equipment and Capacity

Min Quty in

Nos

No.

proposed

1 2-Boom hydraulic Drill Jumbo 4 3

2 Hydraulic Excavator, 2.0 cum 2 -

3 Hydraulic Excavator, 0.9 cum 4 -

Hydraulic excavator CK 90 or equivalent 3Hydraulic excavator CK 75 or equivalent 1

4 Crawler / Wagon Drill 5

Crawler Drill LM100 or Eq 9

5 Heavy Duty Rock Drill, 120 cfm (with 24 24

6 Rear Dumper 18T, 4x4 24

Rear Dumper 15T, 4x4 19

7 Crawler Dozer, 180hp 4

Dozer D6, 165HP 18 Wheel mounted Dozer, 180 hp 1

9 Wheel Loader, 2.5 cum 3 3

10 Loader cum excavator, 1.0cum / 0.24cum 3 1

11 Shotcrete m/c, 4-6 cum 3

Shotcrete Machine, Aliva 260 or Eq (4 - 3

12 Shotcrete m/c with Robot Arm, 10-20 cum 3

Shotcrete machine (30 m3 /hr capacity) 2

13 Raise Climber, 250 M 2 214 Raise Borer 1 -

15 Air Compressor, 600 cfm, Electric 6

16 Air Compressor, 500 cfm, Diesel 3

Air Compressor, 500-600 cfm, electric /

deisel9

Air Compressor, 180 cfm, electric / deisel 2


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Construction EquipmentsS. No. Equipment and Capacity

Min Quty in

Nos

No.

proposed

17 Agg Cr plant , 100 tph 1 1

18 Batching & mixing plant, 60 m3/hr 1 1

19 Batching & mixing plant, 30 m3/hr 1 1

20 Collapsible Shutter form with traveler, 2

Tunnel form with traveler, 8m 2

21 Transit Mixer, 6.0 m3 15 13

22Concrete pump truck mounted with

placing boom, 30m3/hr2 -

23 Concrete pump, 30m3/hr 2 4

24 Concrete mixer, 14/10 cft 3 3

25 Tipper, 10T 24 6

26 Grout Pump 4 3

27 Telescopic Crane, 20T 2

Mobile crane 30T for steel liner work 1

Crawler crane 20T capacity 1

28 Hydra / Mobile crane, 5T 2 229 Rib Erector, 1.8Ton 1 1

30 Scoop Tram / Low profile Loader 1.6 cum 1 -

31 Scissor,s Platform 1 1

32 Flat bed Truck 1

Flat bed Truck 10 ton capacity 2

33 Trailer 1 1

Trailer 20 Ton capacity 1

Trailer 30 Ton capacity 1

34 Bending & Cutting Machine 1 1

35 Bending & Cutting Machine (Steel Plate) 1

Plate bending machine-63mm 1Pug cutting machine 4

36 Power Winch 2

Winch 20T Capacity 4

37 Gantry Crane 1

Gantry Crane 25 T 1

Gantry Crane 15 T 1

Portable gantry crane 30T cap 2

EOT crane of 30T, 10m 1


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LAYOUT OF SOME OF EXISTING/

PLANNED HYDRO PROJECTS


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SATLUJ RIVER

SATLUJ RIVER

DIVERSION TUNNELS

MAIN DAM AXIS

SPILLWAY

POWER HOUSE

PENSTOCKS

KOL DAM -- LAYOUT PLANKOL DAM -- LAYOUT PLAN

KOL DAM HEPP (4 x 200 MW)

DIVERSION DIKE

RESERVOIR

U/S OF DAM

DESILTING

BASIN


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How does a DC look like?


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VIEW OF UNDER GROUND DESILTING CHAMBERVIEW OF UNDER GROUND DESILTING CHAMBER


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Under Ground Excavation

sequence

Stage 1 Excavation of Adit ( Top & Bottom)

Cycle time ( Hr.)

Good Rock 11.32 (3 m Pull)

Poor Rock-14.15 (1 m Pull)

6 m x 6m

85m

150m

235m

4250 HS

Invert : 2134m

Activity Duration 3 to

7 Months+2132.75m

EL +2145

+2124m

260

m

200m


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Stage 2 Excavation of pilot drift ( 6 x 8 m)

up to EL + 2132.75

Av. Progress : 95 m/month

+2132.75m

80m

50m

150m

Invert : 2134 m

400m

Activity Duration 8 to 9.5

months

+2132.75m

+2132.75m


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Stage 3 Outlet tunnels and HRT

Cycle time ( Hr.)

Good Rock 9.59 ( 3 m pull)

Poor Rock - 13.16 (1m pull)

Ave. Progress 95m/m

Activity Duration

Exc 9.5 to14.5 months

Lining 11.5 to 17.5 months (OutletTunnel)

80m

50m

150m

400m

Invert : 2134 m

4.25 m

6.0 m


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Stage 4 Side slashing of desilting chamber

exc up to EL. 2132.75 m & lining upto 2134.m

Cycle time ( Hr.)

Good Rock 16.6 ( 3 m pull)

Poor Rock - 15.36 (1m pull)

Av. Progress : 70m/m

Activity Duration

Exc : 9.5-11.5 months

Lining : 11.5-17.5 month


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Stage 5 Excavation in benching and ramp formation

(EL. + 2132.75m to EL. +2129.75m)

Cycle time ( Hr.) 10.19

(for 25 sqm benching)

Activity Duration 17.5-19.5

months


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Stage 6 Excavation in benching and ramp formation

(EL. + 2129.75m to EL. +2126.75m)



Activity Duration 19.5-25.5 months

EL+2126.75

EL+2126.75

EL+2126.75

Benching 2 Months

Lining from El 2129.75 to 2134.0 4 Months


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Stage 7 Excavation in benching

(EL. + 2126.75m to EL. +2123.75m incl interconnecting

bottom tunnels & removal of ramp)



Activity Duration 25.5-28.5 month

Interconnecting Tunnels 1 Month

Removal of bench and benching down 2 month

EL+2123.75

EL+2123.75

EL+2123.75


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Stage 8 Excavation of trench

Activity Duration 28.5- 39.0 month

Trench exc 2 Month

Conc in Trench EL+ 2120 to EL+ 2123.75 =3.5 Month

Lining in Hopper El + 2123.75 to 2129.75 to 5 Months


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How does a HRT look like?


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Circular HRT


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Horse shoe type HRT


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Modified horse shoe type HRT


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Cross Section of a Horse Shoe HRT


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Surge Shaft

How does a surge shaft look like?


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Looking from top towards bottom

Dhaulinganga HEP Surge Shaft


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Nathpa Jhakri HEP Surge Shaft


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Excavation Scheme For Surge Shaft


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Text (Font Arial 16, Color Black, Line Spacing 30 points).


Excavation Scheme For Surge Shaft


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Surge shaft pilot hole

Tunnel Level

Surge shaft Top level


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Surge shaft Reaming

Surge shaft Top level

Tunnel Level


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Raise borer

Nathpa JHAKRI HEP Surge Shaft Raise borer


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p g

Raise borer


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Raise borer

Raise borer


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Raise borer


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Valve House ExcavationValve House Excavation

SequenceSequence

Excavation Sequence Of Valve Chamber


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q


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Location of Pressure Shaft


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Location of Pressure Shaft


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Bifurcation of HRT into

Pressure shafts under

construction.


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Bifurcation of HRT Into Two PRESSURESHAFTS Finished.


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CONSTRUCTION OF PRESSURE

SHAFTS BY RAISE CLIMBER


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Excavation Scheme For Inclined Pressure Shaft


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Excavation Scheme For Inclined Pressure Shaft

Methodology - Enlargement of Inclined Tunnel


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Lower Penstock Tunnel

A-A Section

B

B

InclinedPenstock

Tunnel(56d)

C

CUpper Penstock

B-B SectionC-C Section

A

A(mucking)

(enlarg

ement)

gy g

AA

B

Intermediate adit

Pilo

thole


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Extension of Intermediate AditExtension of Intermediate Adit


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POWER HOUSE &

TRANSFORMER HALL


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Koyna Powerhouse StageMachine Hall


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Machine Hall

Koyna Powerhouse Stage


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Machine Hall

Dhaulinganga HEP MachineH ll


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Hall

Dhaulinganga HEP Machine Hall


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Purulia PSP Crane Beam And Columns


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Purulia PSP Machine Hall


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Purulia PSP Crane Beam Columns


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Purulia PSP Machine Hall


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PURULIA PSP CRANE BEAM AND COLUMNS


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CONSTRUCTION OF POWER

HOUSE & TRANSFORMER HALL

Excavation Sequence For Powerhouse


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Excavation Sequence Of Transformer Cavern


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POWER HOUSE


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Stage 1, 2, 2A, 3 & 3AStage 1, 2, 2A, 3 & 3A

Power House excavation sequencePower House excavation sequence

Stage

1,Pilo

t

Stage

1,Pilo

t

Stage

2,2

A,

Stage

2,2

A,

Wide

ning

Wide

ning

Stage

3,3

A,

Stage

3,3

A,

Widening

Widening

POWER HOUSE


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Completion of Stage 1, 2, 2A, 3 & 3ACompletion of Stage 1, 2, 2A, 3 & 3A


POWER HOUSE


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Stage 4Stage 4


POWER HOUSE


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Stage 5Stage 5


POWER HOUSE


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Stage 6 Service BayStage 6 Service Bay


POWER HOUSE


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Stage 7Stage 7


POWER HOUSE


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Stage 8Stage 8


POWER HOUSE


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Stage 9 Penstock levelStage 9 Penstock level


POWER HOUSE


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Stage 10 Excavation completeStage 10 Excavation complete



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Documents

Planning & Construction of Hydro Projects,OCT,08