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| 1 | Dismantling of concrete in existing damaged EDA area, cutting & removal of damaged reinforcement at downstream of Barrage. Rates are including dismantling, stacking & disposal of dismantled material within 1000 m lead from downstream area with all lifts and all necessary T&P etc. required for proper completion of work as per construction drawing and technical specifications or as directed by Engineer-in-charge. |
| 2 | Excavation of bed rock/foundation rock at downstream of Barrage for the new stilling basin slab. The excavation work shall be carried out without blasting. Rates are including dewatering, cutting, stacking & disposal of excavatedmaterial within 1000 m lead from downstream area with all lifts and all necessary T&P etc. required for proper completion of work as per construction drawings and technical specifications or as directed by Engineer-in-charge. |
| 3 | Dewatering ofthe area due to seepage of ground water and surface water due to rain etc. excluding excavation of foundation but during execution of civil works including supply of all machine operator, khalasi, POL, T&P, accessories required for proper completion of the work. |
| 4 | Provision and laying of empty cement Bags ( Gunny Bags) filled with local sand and tightened using sutli and carriage up to site for diverting leakage water, making bund etc. including preparing sub grade before placing in position, also including supply of all material, labor, T&P etc. required for proper completion of the work. |
| 5 | Placing M20 grade concrete , complete as per technical specifications to fill cavities in foundation bed rock of stilling basin with all lead & lift, all necessary T&P, batching plant, concrete mixture, concrete pump etc. required for proper completion of work and as directed by Engineer-in-charge. |
| 6 | Placing M25 grade concrete, complete as per drawing and technical specifications in the bottom 1.25 m thickness of stilling basin slabwith all lead & lift, all necessary T&P, batching plant, concrete mixture, concrete pump etc. required for proper completion of work and as directed by Engineer-in-charge. |
| 7 | Poviding and layingof high strength M90 grade concrete as per specifications & direction of E/I ,proper compaction ,curing with all leads & lift ensuring adequate mix design and Quality Control for testingas per IS standards & technical specifications complete finished items including supply of materials,labour,T&P,etc. required for proper completion of work. |
| 8 | Supplying, cutting, bending, fitting and placing HYSD bar reinforcement below top level of stilling basin slab complete as per construction drawing and technical specifications with all tool & plant labor, machinery etc. required for proper completion of work. |
| 9 | Drilling holes for rock anchors using jack hammer/wagon drill of required diameter for 25 mm dia. up to 5 m depth including grouting in foundation rock of stilling basin slab area and key as per construction drawing & technical specification or as directed by Engineer-in-Charge including supply of all the material, labor, T&P etc. required for proper completion of work. |
| 10 | Supplying, cutting, bending, fixing of 25 mm dia. anchor bars of required depth in foundation rock of stilling basin area and end sill complete as per construction drawing and technical specifications with all tool & plant labor, machinery etc. required for proper completion of work. |
| 11 | Chipping of the Defective & unsound Concrete and cleaning in the spillway portion. Loose delaminated and unsound concrete shall be chipped out completely to reach the sound concrete surface by using concrete breaker/chipping tool. Cleaning shall be done to remove dust, micro fractured particles & foreign material by using grinder, wire brush, air blower and water jet. Area shall be saturated with clean water and allow the surface to come to a saturated, surface dry (SSD) condition.The work shall be done by deploying expert labors having experience of working on hydraulic structure by using latest machines, tools and all safety equipment’s as directed by the Engineer in charge. |
| 12 | Drilling 38 mm diameter, 2m deep holes for installing of 25 mm dia. anchor barincluding grouting of holes with high performance resin compound for proper anchorage of connecting anchor bar in spillway portion to connect new concrete and old damaged concreteas per site conditions & technical specification or asdirected by Engineer-in-Charge including supply of all the material, labor, T&P etc. required for proper completion of work |
| 13 | Supplying, cutting, bending, fixing of 25 mm dia. anchor bars of required depth in damaged spillway portion as per site conditions complete as per construction drawing and technical specifications with all tool & plant labor, machinery etc. required for proper completion of work. |
| 14 | Providing & applying bonding agent betweennew concrete and old damaged concrete in the spillway portion as per construction drawing, technical specification or as directed by Engineer-in-charge including supply of material, T&P etc. required for proper completion of work. |
| 15 | Repairs to damages on spillway portion with micro concrete as per site conditions. |
| 16 | Removal of RBM & boulders accumulated/ deposited in the river channel downstream of Barrage in stilling basin area and in further downstream river channel reachto get clear river width for flood water way, including dewatering,all lift and/or disposal by lifting / pushing boulders to left and right banks as per drawing or as directed by Engineer-in-charge within 1000 meters lead. |
| 17 | Temporarily sealing the stop log gatetiers in a gate grove or Radial gatewith the help ofdivers and all sealing material (for two occasions) including all cost of labor, T&P etc. required for proper completion of work |
| 18 | Drilling of 38 mm dia, holes, 8 m deep for consolidation grouting of foundation rock of stilling basin in selected area including all labor, materials, equipment, accessories and operations and requirement for proper completion of work. |
| 19 | Consolidation grouting of foundation rock of stilling basin in selected area including all labor, materials, cement, equipment, accessories and operations and requirement for proper completion of work. |
| 20 | Providing and laying of 250 mm Half round glazed stone ware pipes (open jointed) @ 3000 mm c/c both waysfor sub-surface drainage system. |
| 21 | Providing and laying of 300 mm half round glazed stone ware pipes (open jointed), one in each bay along the stilling basin length with exit at d/s ofend sill for release of uplift pressure. |
| 22 | Drilling of 76 mm dia. holes below stilling basin slab 8 m deep for release of uplift as per details covered in the construction drawings and as directed by the Engineer-in-Charge. |
| 23 | Dressing / excavating of river bed in 1:10 slope beyond End Sill to meet the existing river bed profile. |
