Internal Repair works on 2800 mm dia RCC pipeline using chemical compounds on select locations from chainage 8.00 Km to 12.60 Km under maintenance of 200 cusec delhi water supply scheme.

INTERNAL REPAIR WORK ON SELECT CHAINAGES

Making lighting arrangement inside the RCC conduit by laying/stretching 4 Sq mm 2 core PVC insulated 1100V grade copper cable on top surface of RCC conduit, supply and fixing of multiple holder and 15 watt LED of Bajaj/Anchor/Havells or equivalent ISI mark at a maximum distance 6m c/c between two lights including drilling of G.I. hook,PVC clip,cutting of cable, labour and T&P etc complete.

Dewatering from pipe line of 200 cusec pipe line including hiring of pump set of . diesel operator etc. complete & suction pipe & delivery etc. complete.

Hiring of generator 100 KVA at site for 8 hours shift including supply of diesel, Mobil oil, generator operator and cartage up to site. (Considered 2 Shift per day)

Cleaning of Joints including removing of baker rod, filling and all other loose materials from the expansion joint and clean the surface around the joint to make it free from loose particles,dirt,oil,grease etc and disposal of malba/debris outside of pipeline including all labour,T&P etc complete.

Drilling and fixing injection packers in RC members including, Drilling Holes: Drilling holes in structural members at the intervals as per recommendation of engineer in charge.Cleaning of holes: Clean the holes by air blower prior to fixing nozzles. Fixing of Packers: Insert 12 mm dia., 50~75 mm long injection packers in cleaned holes with moisture insensitive epoxy resin based putty or equivalent. Cutting of Packers: Cut the packers by cut of wheel after completion of grouting without damaging structural elements.Patching Hole:- After cutting of packer we patch the hole on epoxy putty.

Supply and apply single component, Polyurethane Injection foam based system for wet condition and temporary sealing, which cures to a dense flexible foam with a fine cellular structure. Minimum Product Requirements: Viscosity cps 500-1300 at 23°C

Supply and apply 2 component, elastic, low viscous, solvent free, Polyurethane Injection resin based system for permanent sealing, that does not need the presence of water for hardening reaction Product Requirements: Viscosity of mixture < 100 mPa•s (at +20°C) Capable of penetrating cracks>0.2mm wide with a CE Marking (European Conformity) -> Conformance label that product is approved to the essential requirements and under market surveillance

Repairing the edges of the joint (in case of weak concrete at the joint edge) and also configuring the joint width (in case of expansion joints with irregular width more than the width of the chosen Sikadur Combiflex Tape width) with epoxy repair mortar Sikadur 31 and Sikadur 41/ Sika Latex or its equivalent.

Filling the joints with Rubber compression seal for expansion joints of size next higher to the joint gap and apply Polysulphide sealant in the expension joint up to a depth equal to not less than 1/2 the width of the joint including insert bitumen impregnated board as filling material,T&P etc. complete.