Replacement of Gravity Collection System at Shastri Nagar 3rd,6th,8th,10th cross streets and 1st main road in Depot 174,Area XIII.

Amount

Supply and Delivery 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.Laying DWC 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, watering and ramming to consolidation, etc., complete for the pipes of following diametres including testing

250 mm dia pipe

at 1.0m deep

at 1.5m deep

at 2.0m deep

at 2.5m deep

at 3.0m deep

at 3.5m deep

at 4.0m deep

400 mm dia pipe

at 4.5m deep

Cement concrete 1:3:6 using 40mm gauge hard broken stone jelly for plain cement concrete works including laying in layers of not more than 15cm thick including ramming curing, etc., complete

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, Providing Plain Cement Concrete 1:1.5:3 using 20mm B.G. jelly for foundation,supplying and filling sand for bedding, 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 steel reinforcement, 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 charges of precast machinehole at the required position as directed by the engineer at site including testing the machinehole with water for 48 hours to check water tightness and rectifying the defects if anyfor the following sizes and depths

at 1.0m deep

at 1.5m 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 Plain Cement Concrete 1:1.5:3 using 20mm B.G. jelly for foundation,supplying and filling sand for bedding, 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 steel reinforcement, 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 charges of precast machinehole at the required position as directed by the engineer at site including testing the machinehole with water for 48 hours to check water tightness and rectifying the defects if anyfor the following sizes and depths.

at 2.0m deep

at 2.5m deep

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 machine holes.

at 3.0m deep

at 3.5m deep

at 4.0m deep

at 4.5m deep

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 3 mm 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

Cutting Asphaltic Concrete Road

Non bus route

ii) 2.0m to 4.0m

Bus route

ii) 2.0m to 4.0m

iii) 4.0m to 4.5m

Cutting DWC PE Pipes

250mm ID DWC PE or PP Pipe

Supplying and filling with stone dust for bedding for a thickness of 10cm and back fill envelope for a thickness of 150mm above the crown of the pipe for DWC PE pipes including ramming, consolidation etc., complete

Dewatering using 5HP diesel pumpsets including hire charges of pump, cost of fuel and operator as per PWD.

Refilling with excavated soils (other than sand) complying with standard specifications for filling in foundations and basement.(for DWC PE pipe length)

Disposal of surplus earth (for DWC PE pipe length)

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

Providing form work with centering for soffits of reinforced cement concrete slabs or plain surfaces including shuttering for

For end concrete

Making through holes in plain or reinforced cement concrete with diamond core drilling system by using BOSCH power tools of following diameters - depth per cm (100mm)

Providing anchor blocks for PE pipes (at either sides of pipe jointing) for average depth of conduits greater than 2.50m.

a) 250mm dia

b) 400mm dia

The Contractor must obtain the existing Static GCP points from CMWSSB which should be considered as the control point with known coordinates X, Y and Z. Survey consultant to ensure the closing error is within permissible limits (SoI Standards) while transferring the levels from the existing Static GCP points and the same to be presented as a report. The same process shall be adopted for random verification of positional accuracy of points established using the PBMs as base. As built survey for every sewage and water pipeline and other assets must be done using DGPS based RTK method by transferring the coordinates from the nearest Static GCP of CMWSSB. Where there are signal interruptions for the RTK method, Total Station can be used. The coordinates from the static GCP shall be transferred to the Total Station by RTK method and the co- ordinates of the assets can then be captured by Total Station. All the features, attributes of all the assets, utilities captured shall be Geo referenced as per standard Coordinate reference system (WGS 84 UTM Zone 44N). The final base map with assets and utilities Note: 1) The utilities pertaining to water supply scheme work is attached in Sheet A. 2) The utilities pertaining to underground sewerage scheme (UGSS) is attached in Sheet - B 3) The General Assets are enclosed in Sheet - C 4) The minimum of 20 attributes to be filled for each feature / assets and as directed by the Site Engineer. Where the Site has already been surveyed and maps available in UTM Zone44 coordinate system with TBM available on ground or coordinates of other assets available on Ground. 195 shall be furnished in (.shp) format. The geo referenced assets and utilities along with the attributes (as specified by the GIS Wing, CMWSSB) shall be converted into proper geo database (FGDB / PGDB) with the attributes. One set Hard and Soft Copy of all the CMWSSB assets and utility has to be prepared category wise network wise in A0 Print for verification in a print scale of 1:1000 in A0 plot, with standard legends in international and NUIS standards and should be legible and three sets of final Hard Copy in A0 print. (a) For the Underground / Surface Assets along the roads for the distance ranging from:

For the Point Underground / Surface Assets along the roads

For the Underground Utilities / Surface Assets like WTP, STP, Filling Station etc

Total excluding GST

SRI AMBAL ENTERPRISES (BID ID -1337817)

E.VENKATESAN (BID ID -1336261)

V R G Constructions Private Limited (BID ID -1336388)

R.Shankar (BID ID -1335525)