Chennai Metropolitan Water Supply And Sewerage Board Tender

at a depth 1.5m

at a depth 2.0 m

at a depth 2.5m

Construction of RCC machinehole using sulphate resistant cement with M30 design mix concrete using Crushed stone sand (M sand) including earthwork excavation as per SS20B , providing point edge to well kerb using ISA 150x75x10mm weighing at 16.9kg/m,sinking well kerb below 2m from G.L.or by open excavation for various depth as per site condition with M30 mix for side wall, raft and roof slab,including cost of steel reinforcement ,including bailing and pumping out water, formwork, plugging the bottom with PCC 1:3:6 using 40mm hard broken granite jelly, laying plain cement concrete 1:3:6 using 12mm to 20mm hard broken granite jelly for fixing frame, fixing FRC machinehole cover and frame, providing CI steps, ,benching and channelling including refilling the trenches with excavated earth and disposal of earth etc. Including testing the machinehole with water for 48hours to check water tightness and rectifying the defects if any complete for the following size of machineholes.

at a depth 3.0m

at a depth 3.5m

Supplying and delivery of CI pipes as following sizes - LA Class

300mm dia

Laying, jointing with lead / leadwool, testing of C.I. pipes including earthwork excavation for trenches in hard stiff clay, stiff black cotton, 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 10m. and carting of pipes from any of the Board’s stores to the site of work, lowering into trenches and aligning, refilling the trenches with excavated soil, watering and ramming to consolidation, disposal of surplus earth etc.

300mm dia

at a depth 3.0m

at a depth 3.5m

Supply,Delivery and laying of DWC Structured Wall Polyethylene Piping Systems (Pipe with online/offline coupler and elastomeric sealing ring) with required specials non-smooth external annular corrugated and smooth internal surface (Double wall) (SN 8 Class) for non-pressure underground sewerage, drainage application generally as per IS-16098 (Part-2) type B.

250 mm dia

at a depth of 1.0 m

at a depth of 1.5 m

at a depth of 2.0 m

300 mm dia

at a depth of 2.5 m

Providing House service connection: Supplying, laying jointing and testing UPVC pipe including earthwork excavation for trenches in hard stiff clay, stiff black cotton, 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 10m. lowering the pipes into the trenches, aligning, refilling the trenches with excavated earth in layers of not more than 23cm thick watering, ramming to consolidation and disposal of surplus earth etc., complete

100 mm dia

150 mm dia

Cement concrete 1:2:4 using Crushed stone sand (Msand) and 20mm gauge hard broken stone jelly for plain concrete works including laying ramming curing, etc., complete. (End Concrete for pipes at two ends of Machine Hole)

Providing iron barricading of size 2.50m width and 1.75m height using 40x40x4mm angle for outer frame supports, 25x25x3mm angle for inner frame supports and 20 gauge thickness MS Sheet for name board (as per drawing) including cutting, welding, fabrication charges and 1 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.

Providing, and fixing dummy at upstream side downstream of the manhole with safety gadgets

shallow depth upto 2.5 m

Removing dummy at upstream and downstream of the manhole with safety gadgets

Shallow depth upto 2.5m

Dewatering using 10HP diesel engine pumpset including Hire charges, cost of Diesel, Engine oil, pump operator, labour charges, conveyance of pumpset and fuel to site and back, loading, unloading and any other incidental charges etc., complete. (Dewatering sewage from U/s to D/s from Machine holes)

Provision for erection of borewells of size 6" to 8" dia in Sedimentary formation using hand boresets including insertion of casing pipes supplying and packing of pebbles and conveyance of hand Boreset including loading and unloading

Labour Charges for inserting 150mm dia (M.S.Casing pipes assembly with slots or with out slots) in the drilled hole including welding the joints etc., complete and supplying and packing the annular space with pebbles of size and quality as approved by the Executive Engineer CMWSS Board

150mm dia Casing pipes assembly

Hire charges for diesel pumpset with fuel and crew charges including transportation

For 3 HP

For 7.5 HP

Providing Lighting Arrangements during night

Disposal of surplus earth.