Package 5 - Civil works for Repair and Restoration work in HRT from Adit-3 downstream to Adit-5, Surge Shaft, Tail Race Tunnel area etc. of Teesta-V Power Station, Sikkim

Amount

1) Dewatering during Construction

1.1) Dewatering in HRT (fixed rate item )

2) Common excavation

2.1) Surafce excavation in TRT area

2.2) Silt removal from HRT (adit 3 to Adit 5) ,Surge shaft orifice slab ,Surge gallery etc.

2.3) Rock excavation

3) Embankment construction and backfill

3.1) Dyke construction Zone 4 material

3.2) Clay fill material for impervious core

3.3) Random backfil

4) Drilling ,Grouting and Pressure relief holes

4.1) Contact Grouting as ordered by engineer-in-charge

4.2) Consolidation grouting

4.2.1) Drillling of grout holes 45 mm dia. In HRT

4.2.2) Grouting operations in single stages excluding cement

5) Grouting materials

5.1) Cement

5.3) Bentonite

5.4) Admixures

6) Concrete

6.1) M25A40 concrete including formwork in HRT

6.2) TRC Apron , guide wall concreting including formwork RCC M25 A40

6.3) Repair of damaged cocnrete lining of surge shaft including forwork RCC M25 A40

6.4) Backfill concrete behind Surge shaft plum cocnrete M10 A80 including formwork

6.5) Plums in concrete

6.6) RCC M25A40 concrete in Toe wall including formwork for protection work on left and right banks

6.7) PCC M20A40 including formwork for concrete cladding on wirecrates on left and right banks

6.8) PCC M15A40 including formwork levelling concrete below toe wall on left and right bank

6.9) Providing and applying Epoxy mortar for HRT repair works conforming conforming to Technical Specification

6.10) Providing and applying high performance cementitious mortar in HRT 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

7) Cement variation in Concrete (fixed rate item)

8) Admixtures for concrete

8.1) Air entraining agent

8.2) Superplasticizers

10) Reinforcing steel

10.1) Deformed reinforcing bars Fe 500 for Surge shaft lining repair including straightening the existing bars to original position, welding/lap new bars with old/existing bars

10.2) Deformed reinforcing bars Fe 500 for TRC apron, guide walls and Toe wall on left and right bank

11) Slope protection

11.1) Boulder wire crates on left and right bank

RITHWIK PROJECTS PRIVATE LIMITED