REPAIR/ REPLACEMENT OF FOUNDATION BOLTS, FITMENTS OF BUOYANCY CHAMBERS USING FLOATING MOBILE CRANE UNDERWATER INSPECTION OF HINGES, UNDER WATER WELDING OF HINGES AND OTHER CONNECTED REPAIR WORKS ON SURYA FLAP GATE, VARUNA FLAP GATE ,REPAIRS IMPROVE

Amount

Materials & Labours for chipping & removal of existing damaged, cracked, spalled & loose portion of concrete of the RCC members around crane rail joints/junction which is sinking, completely till the reinforcement is exposed and sound concrete (thickness may be upto 100mm to 300mm) is observed by using mechanical means and manual chisels and further the surface is jetted with clean water for removal of dust and loose particles and complete all as specified and as directed.

Materials & Labours for laying cement based Micro-concrete, Rendroc GP 2 of Fosroc make or techno commercially equivalent of having dynamic resistant material, pre packed single component, chloride free, sulphate free, non-shrink, free flow, self-compacting , ready to use after mixing water in specified proportion of approved quality. Form work shall be provided for placing micro concrete patch repair as required at site with steel jack system and steel props to support the form work in this application of high strength, dual shrinkage, compensated, micro concrete for placing in nominal thickness of more than 50mm for concrete repair with compressive strength of 40 Mpa at 28 days complete all as specified and as directed. Note: Formwork and application of curing compound over the green concrete are inclusive of the above quoted rate.

Materials & labour for providing Shear connectors and Anchoring : Drilling 12mm dia holes up to depth of 100mm and fix 10mm dia TMT bars L shaped anchor rods as shear connectors in defective concrete area of the slab, column, beams, chajjas, lintel etc., or any other structural member as the case may be. Clean the same using water and make sure that there is no fine particle present in the hole. Mix the base and hardener of the polyester resin Fosroc Lock fix or techno commercially equivalent with the spatula thoroughly. Fill the drilled and cleaned holes to a minimum depth of 3/4th of the hole with the prepared polyester resin and the reinforced bar shall be inserted to full depth of hole and extra length of the reinforcement bar shall be bent into the concrete to maintain proper cover to the reinforcement wherever required/as directed by Engineer-In-Charge complete all as specified and as directed.

Supply & Fixing structural steel framed work such as angle, channel etc cut to shape, including bending and welding angles as necessary confirming to Fe-290, Gde E-165 as in supporting structure of duct, blanking of plates and capstan(-1.00m to -2.50m level), rail track edge angles, working in a confined area including making good the disturbed portion of concrete surfaces(where ever required or directed by engineer-in-charge) with 1:1 1/2 :3 type A0 using 12.5mm stone aggregate complete all as specified and as directed. Note: The above quoted rates inclusive of re-fixing or re-align the crane rail track alongwith tightening of nut & bolts to base plate/fish plate to its original position by using total station with qualified certified surveyor.

Dismantling of mild steel work or wrought iron of any description and in any position complete all as specified and as directed.

Materials & Labours for preparation of new/old(including surface preparation) steel surfaces of any description over 10cm width or girth and applying two coats of chlorinated rubber paint over a coat of zinc chrome primer complete all as specified and as directed.

Materials & Labour for Under water welding Varuna flap-gate at (-)11.00 MRL in position, Inspection set-up and operating machinery such as HP water jets, air/water lifts, flushing and cleaning of hinge/hinge pedestal areas, maintaining of all topside under-water welding equipment and compressors, cutting the suitable sizes of MS plate 38mm thick, placing in position of Upper hinge base frame and welling with professional commercial divers all as specified and directed. Note: Necessary tools, underwater equipment and consumables including underwater welding rods.

Materials & Labour in repairs for Flap-gate of 50mm dia MS Studs, washers and nuts along with 120mm square base plate to facilitate fixing of temporary buoyancy tanks including cutting the existing corroded studs, cleaning the base fixing New studs. Note: Fixing of temporary buoyancy tanks paid separately.

Fixing of temporary buoyancy tanks and making necessary arrangements hiring of Floating crane of ' Hanuman" ensuring the erection of temporary buoyancy tanks of 05 Nos on Flap-gate. Note: The above quoted inclusive of all safety precautions and if any near-mis/ accidents occurs the contractor is solely responsible, the contractor has to bear all the expenditure to recover the gate to its original state. Also, the contractor must have certified/qualified experienced divers.

Eastern engineering Enterprises