Shifting of sewer collection system at the junction of Sri Ayyappa Nagar 1st Main Road and Kaliamman Koil Street, Koyambedu, Depot 127, Area X.

Shifting of sewer collection system at the junction of Sri Ayyappa Nagar 1st Main Road and KaliammanKoil Street, Koyambedu, Depot 127, Area X

Supply, delivery & laying of C.I. pipes including earthwork excavation for trenches in hard stiff clay, blackcotton, hard red earth, shales, murams, gravel, stoney earth and earth mixed with small size boulders and hard gravelly soil depositing the earth on banks with initial lead of 10 m and initial lift of 2m carting the pipes from any of the Board’s Stores to the site of work lowering into the trenches, aligning, refilling the trenches with excavated soil, watering and ramming to consolidation, etc., complete for the pipes of following diametres.

400mm dia at 4.5m deep

400mm dia at 6.0m deep

Construction of Precast circular RCC machinehole using sulphate resistant cement with M30 design mix concrete using Crushed stone sand (M sand) including earthwork excavation as per SS20B including timbering and pumping charges(for 2.5m depth and above),Providing PlainCement Concrete 1:1.5:3 using 20mm B.G. jelly for foundation,supplying and filling sand forbedding, Providing base units of 1m height(base slab and sidewall),riser unit (without corbel) of varying heights to suit the various depth requirements and roof slab including cost of steelreinforcement, cost of fabricating the steel mould using MS sheet and ISA angles including material and labour cost, Providing CI steps, fixing FRC machinehole frame and door, benching and channelling, refilling with excavated earth and disposal of surplus earth, joining of precast units by grouting with CM1:1 and polyurethane based water proofing compound 1% (by weight of cement) at shear key and protruded bars- grout holes locations,Cost of conveyance and erection chargesof precast machinehole at the required position as directed by the engineer at site includingtesting the machinehole with water for 48 hours to check water tightness and rectifying the defectsif anyfor the following sizes and depths.

1.20m dia at 5.5m deep

1.20m at 6.0m deep

Cutting of pipes

400mm CI pipes

Providing Iron Barricading of size 2.50 m width and 1.75 m height using 40x40x4 mm angle for outer frame supports, 25 x 25 x 3mm angle for inner frame supports and 20 gauge thickness MS sheet for name board (as per drawing) including cutting, welding, fabrication charges and one coat of primer and 2 coats of enamel paint of approved quality, writing "METRO WATER" & work detail/caution sign, providing necessary interlocking arrangements with adjoining units, fixing danger flags, danger lights, reflectors, fixing stickers etc, including watching during night and placing the barricading units as directed at the sites