planning & construction of hydro projects,oct,08
TRANSCRIPT
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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)
Cycle time ( Hr.) 10.19
(for 25 sqm benching)
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)
Cycle time ( Hr.) 10.19
(for 25 sqm benching)
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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Dhaulinganga HEP Surge Shaft
Dhaulinganga HEP Surge Shaft
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Dhaulinganga HEP Surge Shaft
Nathpa Jhakri HEP Surge Shaft
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Nathpa Jhakri HEP Surge Shaft
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Nathpa Jhakri HEP Surge Shaft
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Nathpa Jhakri HEP Surge Shaft
Nathpa Jhakri HEP Surge Shaft
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Nathpa Jhakri HEP Surge Shaft
Nathpa Jhakri 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).
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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Text (Font Arial 16, Color Black, Line Spacing 30 points).
Text (Font Arial 16, Color Black, Line Spacing 30 points).
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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Text (Font Arial 16, Color Black, Line Spacing 30 points).
Text (Font Arial 16, Color Black, Line Spacing 30 points).
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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Dhaulinganga HEP Machine Hall
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Dhaulinganga HEP Machine Hall
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Purulia PSP Crane Beam And Columns
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Purulia PSP Crane Beam And Columns
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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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Text (Font Arial 16, Color Black, Line Spacing 30 points).
Text (Font Arial 16, Color Black, Line Spacing 30 points).
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 excavation sequencePower House excavation sequence
POWER HOUSE
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Stage 4Stage 4
Power House excavation sequencePower House excavation sequence
POWER HOUSE
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Stage 5Stage 5
Power House excavation sequencePower House excavation sequence
POWER HOUSE
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Stage 6 Service BayStage 6 Service Bay
Power House excavation sequencePower House excavation sequence
POWER HOUSE
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Stage 7Stage 7
Power House excavation sequencePower House excavation sequence
POWER HOUSE
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Stage 8Stage 8
Power House excavation sequencePower House excavation sequence
POWER HOUSE
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Stage 9 Penstock levelStage 9 Penstock level
Power House excavation sequencePower House excavation sequence
POWER HOUSE
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Stage 10 Excavation completeStage 10 Excavation complete
Power House excavation sequencePower House excavation sequence
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