Carrying out Under Water Repairs of Bridge foundation in Karwar region of KRCL.

Cutting and removing the corroded liner at the affected location under water, thoroughly cleaning the affected portion using high pressure water jet including the cost of boats, divers, labours, pump, consumables etc. Complete.

Drilling of holes of 16mm dia, 50mm depth or suitable size in piers under water of bridge minimum 4 to 8 number per pier including supplying and fixing stainless steel nut bolts 2 12mm dia, 90mm long, fixing 5mm thick transparent FRP sheet over lapping 50mm on all sides of the cut liner and sealing materials similar to the property of sika guard 694F(1) leaving inlet and outlet nipples at the top corners complete with boat, divers, labours, consumables etc complete. (FRP sheets shall be paid separately)

Supplying and applying fast setting plugging material similar to the property of sika 3 guard 694F (1) inside the cavities and on the priphery of FRP sheet to make it watertight under water with all labours, materials, boat, tools and plants, consumables, equipment, scaffolding if any etc complete.

Supply of 5 mm thick transparent FRP sheet in required size, salt water grade which can resist a pressure of 7 Kg per sqm with drilled holes on sides to accommodate SS bolts as directed by the Engineer in charge.

Pressure grouting through the nozzle already provided under item no.2 above with low viscosity epoxy grout ( 2 packet compound) having quality similar to Sikadur 53 F at a pressure of 3 to 5 Kg/Sqm with all tools and plants equipment, labours and materials leads, lift, boat, scaffolding, material etc complete. Above/

Carrying out video graphic recording of repaired pile including of the entire depth of pile after carrying out repairs including contractors own camera, boat, consumables, divers, labour etc complete and submitting the result in 3 st of CD's (unit - Each may be read as "per pier") Above/

Removing all loose deteriorated concrete portion,organic and inorganic substances etc.from cavities in pier under water using wire brush,filling cavities using anti wash-out non shrink cementitious micro concrete quick setting and high initial strength similar to Rendroc UW duly 1 erecting leak proof steel form work of adequate sizes to plumb and line by employing experienced compatible divers capable to do under water concreting as directed by the Engineer - in -charge. All labour, materials Tools and plants, consumables, scaffolding including all lead and lift etc. by the contractor. Payment Is based on the materials used at site which will be maintained by engineer-in- charge on day to day