Repairing of Retaining Walls at various locations from Zero Point to Lal Tanki water tank at Teesta V Power Station Balutar

Amount

Dismantling boulders laid in wire crates including opening of crates and stacking dismantled materials.

Clearing jungle including uprooting of rank vegetation, grass, brush wood, trees and saplings of girth upto 30 cm measured at a height of 1 m above ground level and removal of rubbish upto a distance of 50 m outside the periphery of the area cleared.

Excavation work by mechanical means (HydraulicExcavator)/ manual means in foundation trenches or drains exceeding 30 cm depth, 1.5 min width or 10 sqm on plan including dressing of sides and ramming of bottoms lift upto 1.5m, including getting out the excavated soil and disposal of surplus excavated soils as directed, within a lead of 50m. Ordinary Rock.

Excavation in hilly area in ordinary rock not requiring blasting by Manual means including cutting and trimming of slopes and disposal of cut material with all lift and lead upto 50 metres.

Providing and Laying in position cement concrete of specified grade including compacting curing etc all complete - 1:4:8 mix. (1 cement, 4 coarse sand, 8 stone aggregate of 40mm & down size).

Reinforced cement concrete in sub-structure as per drawing and Technical Specification RCC Grade M25. Case-I : Using concrete Mixer. Height upto 5m

Supplying, fitting and placing HYSD bar reinforcement in sub-structure complete as per drawing and technical specifications.

Providing & laying Plum concrete in 1:2:4 c.c. (1cement, 2coarse sand, 4clean hard graded stone chips of 20mm down nominal gauge) with 70% clean hard stone of sizes not exceeding 15cm including shuttering, compacting and curing complete. (clean hard stone shall be available at site)

Providing, fixing & removing form work for casting R.C.C items as indicated below: with locally available timber) Foundation, footings, base of column etc for mass concrete.

Providing, fixing & removing form work for casting R.C.C items as indicated below: with locally available timber) Wall.

Providing, fitting and fixing soil, waste and vent pipes including testing etc complete. 75 mm dia. PRINCE/ SUPREME or equivalent soil pipe.

Providing and laying of Filter media with granular materials/stone crushed aggregates satisfying the requirements laid down in clause2504.2.2. of MoRTH specifications to a thickness of not less than 600mm with smaller size towards the soil and bigger size towards the wall and provided over the entire surface behind abutment, wingwall and return wall to the full height compacted to a firm condition complete as per drawing and technical specification.

Providing box drain of 30 cm(ht) x 45 cm(width) internal dimension with 1:2:4 Plum concrete(20mm&down) in side walls thickness of 23cm (hill side) and 30cm(roadside) and 1:3:6 (20mm&down) base concrete of thickness of 15cm with standard specification over 15cm stone soling including providing & laying guard stones complete,as per the direction of the Engineer in Charge.