Package-3, Civil works for Repair and Restoration of Concrete Dam and Appurtenant Structure, Power Intake, Desilting Chambers, Branch HRT, GOC, Gate Shafts and Part HRT etc. upto Adit 1 of Teesta-V Power Station, Sikkim.

Amount

1) Dewatering during Construction

1.1) Dewatering of Surface Construction Site and underground area (fixed rate item )

2) Rock Support

2.1) 25 mm dia. grouted anchor bars

2.1.1) length 3 m

2.1.2) length 4 m

2.1.3) length 6 m

2.2) mm dia. grouted rock anchor bars

2.2.1) length 6 m

2.2.2) length 9 m

2.3) Extension for embedding the concrete wherever required

3) Drilling, Grouting and Pressure relief holes

3.1) Drilling for curtain grout holes into the rock from galleries /drift upto 40m deep

3.1.1) Drilling of 45mm dia grout holes in rock

3.1.2) Grouting operations in multi stages

3.2) Consolidation grouting near dam foundation in NOF block upto 5 m deep

3.2.1) Drillling of grout holes 45 mm dia.

3.2.2) Grouting operations in single stages

3.3) Drilling of drainage holes from drifts or galleries

3.3.1) Drilling of 76 mm dia. holes

3.3.2) Supply and installation of drain outlet devices

3.4) Drilling of drainage holes from open

3.4.1) Drilling of 76 mm dia. holes

3.4.2) Supply and installation of 36 mm dia. slotted pvc pipe

3.5) Drilling of exploratory holes,check holes and holes for instrumentation

3.5.1) Drilling of 76 mm dia. holes

3.5.2) Drilling of 98 mm dia. holes

3.6) Extra for core recovery

3.7) Water pressure Test-Simple water pressure test

3.8) Contact grouting as ordered by Engineer-in-charge

4) Grouting materials

4.1) Cement

4.3) Bentonite

4.4) Admixures

5) Two Components Polyurethen(PU) Grout

6) Concrete Dam and associated structures structural repair works

6.1) M70/A20 High performance concrete(HPC) in Glacis including formwork (excluding silica fume)

6.2) Silica Fume

6.3) M25A40 for damged glacis & pier repair including formwork

6.4) M25A40 Concrete in for Power pack room, control room, security room, Parapet wall & cable trench etc. including formwork

6.5) M25A40 concrete for concrete cladding on dam abutments including forwork

6.6) M35A20 in block outs including formwork

6.7) M20A40 Concrete filling of drift in Dam including formwork

6.8) Backfill Concreting behind steel pipe M30 A20 including formwork

6.9) Providing and applying Epoxy mortar for glacis and pier repair works conforming to EN 1504-3 (R4)

6.10) Providing and applying high performance cementitious mortar on pier faces, desilting chambers and other areas complying with EN 1504-3 (R4

6.11) Providng and applying of two component Epoxy binder (resin and hardener) conforming to ASTM C881 Type-IV class C as per technical specification

6.12) Providing and applying of Epoxy resin system of approved make filling in drilled holes for anchoring including the cost of all materials carriage, staging, scaffolding and labour etc. complete finished items.

7) Cement variation in Concrete (fixed rate item)

8) Admixtures for concrete

8.1) Air entraininng agent

8.2) Superplasticizers

9) Demolition and dismantling of intact concrete by mechanical means including labour, scafolding, equipment, machinery, dismantling of separated concrete and its disposal, complete in all respects by mechanical means for e- flow steel pipe in NOF block.

10) Demolition and dismantling of intact concrete by mechanical means including labour, scafolding, equipment, machinery, dismantling of separated concrete and its disposal, complete in all respects for hydraulic cylinder area.

11) Fixing Tor steel anchors in the existing concrete around e-flow cutting section and hydraulic cylinder area

11.1) Surface preparation of old concrete by way of running wire brush and chiseling for laying of concrete including all stages & scaffolding

11.2) Drilling of 32 mm dia holes for 25 mm dia steel anchors and 500 mm deep into old concrete by way jack hammer or other suitable equipment

11.3) Epoxy resin system of approved make filling in drilled holes for anchoring including the cost of all materials carriage, staging, scaffolding and labour etc. complete finished item.

11.4) Providing and fixing of 25 mm dia Tor steel anchors bent to shape in the drilled holes by suitable means.

12) Reinforcing steel

12.1) Deformed reinforcing bars for repair /restoration of the damaged reinf. of spillway glacis, piers and other area etc

12.2) Plain reinforcing bars

13) PVC water stops

13.1) 230 mm wide

13.2) 300 mm wide

14) Miscellaneous and Ancilliary works

14.1) Hand rail,M S railing ,Access ladder and Misc. steel sections etc

15) Building and Architectural works

15.1) Architectural design and construction of control building and power pack rooms along with associated Architectural works

16) Monitoring Instruments for Dam

16.1) Uniaxial joint Meter -Electronic type

16.2) Direct Pendulum

16.3) Inverted Pendulum

16.4) Up Lift Measuring Stand Pipe Hydraulic

16.5) Topographical Survey Marker

16.6) Survey Target

16.7) V-notch

16.8) Strong Motion Accelorograph

16.9) Data Acquisition system (DAS)

16.10) Readout Unit (Portable)

17) Service water supply and sewerage system

17.1) Pipe work -laying of water pipe line

17.1.1) 100 mm nominal dia

17.1.2) 50 mm dia. nominal dia.

17.1.3) 150 mm nominal dia

17.2) pipe work -laying of sewarage pipe

17.2.1) 100 mm nominal dia.

17.2.2) 150 mm nominal dia.

18) Electrical and Mexchanical works

18.1) Illumination system dam and appurtenat structures

18.2) Restoration of Existing dam elevator

Patel Engineering Limited