Fabrication, supply and Erection of Steel liner in Spillway Glacis at Dam site, Dhauliganga Power Station

Chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual Chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of Engineer-In-Charge (For 50 mm average thickness )

Dewatering from foundation of abutments and wing walls (with pump capacity 4000 lit per Hr.) including wages of operator and fuel including supply of all material, labour and T&P etc. required for proper completion of the work.

Providing and laying of Empty Cement Bags (Gunny Bags) filled with local sand and tightened using sutli and carriage upto site including preparing subgrade before placing in position, also including supply of all material, labour, T&P etc required for proper completion of the work.

Furshing and placing cement concrete as per drawing and techincal specifications RCC Grade M-60 Using Concrete Mixer and Concrete Pump

Applying epoxy mortar over leached, honey combed and spalled concrete surface and exposed steel reinforcement complete as per Technical Specification and confirming to ASTM C881 of Type-1

Providing, mixing and applying bonding coat of approved adhesive on chipped portion af RCC as per specifications and direction of Engineer-in-charge complete in all respect, Epoxy bonding adhesive having coverage 2.20 sqm/kg of approved make.

Providing and injecting approved grout in proportion recommended by the manufacturer into cracks/honey-comb area of concrete/masonry by suitable gun/pump at required pressure of 1-2 kg/cm2 ,including cutting of nipples after curing etc. complete as per directions of Engineer-in-Charge. (The payment shall be made on the basis of actual weight of approved grout injected.(a).Epoxy injection grout in concrete/RCC work of approved make and confirming to ASTM C881 of Type-1 with Grade 1B & 1C of bond strength ≥ 10MPA at 14 days .

Providing M24 Grade 5.8 fully threaded Anchor as per IS 1367(HIT-V/G-M) minimum length 500 mm, including drilling of hole in 28 mm thick steel liner plate of grade IS 2062-E450A/BR and in HPC and fixing M24 grade 5.8 fully threaded Anchor as per IS 1367(HIT-V/G-M) minimum length 500 mm in hole with Chemical adhesive HIT RE 500V4/FIS EM PLUS , complete in all respect in spillway glacis. Hammer drilled hole of 26mm dia and 468mm depth (minimum) shall be done in concrete to fix the anchor. Pull out test of anchors at load of 5.5T per anchor to be done. The scope of work i.e. welding on M24 Grade 5.8 fully threaded Anchor as per IS 1367(HIT-V/G-M) and finishing the surface smoothly by grinding is covered in the item of 32 mm thick steel liner plate of grade IS 2062- E410 A/BR/B0.

Providing and drilling to a minimum depth of 100mm, into pier walls of Grade M10 torque controlled expansion countersunk anchor (HSL-4-SK/FHII-SK)

Drilling of 32mm dia, 0.5 m deep holes in base slab concrete and Fixing 25mm dia. L shaped anchors between base concrete and HPC by injecting Epoxy Grout including all cost of labours, materials, equipments as per direction of Engineer-in-charge.