Replacement of damaged HDPE water main pipes with DI pipes at Bharathidasan Nagar in depot 146 Area XI.

Amount

Material & Labour Cost

Hire Charges for Power breaker to dismantle the concrete /asphaultic road surfaces.

Supplying and laying D.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 (including Backfilling) the trenches with excavated soil, watering and ramming to consolidation, etc., complete for the pipes of following diametres.

100mm dia DI Pipe at 1.5m deep

200mm dia DI Pipe at 1.5m deep

250mm dia DI Pipe at 1.5m 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 of Pipe

100mm dia DI pipe

200mm dia DI pipe

250mm dia DI pipe

100mm dia Tee

100mm dia MJ Collar

100mm dia 90 Degree Bend

100mm dia Sluice Valve

100mm dia Flanged Socket Tail Piece

100mm dia Flanged Spigot Tail Piece

200mm dia Tee

200mm dia MJ Collar

200mm dia 90 Degree Bend

200mm dia Sluice Valve

200mm dia Flanged Socket Tail Piece

200mm dia Flanged Spigot Tail Piece

200 x 100 reducer

250mm dia Tee

250mm dia MJ Collar

250mm dia 90 Degree Bend

250mm dia Sluice Valve

250mm dia Flanged Socket Tail Piece

250mm dia Flanged Spigot Tail Piece

250 x 100 reducer

250 x 200 reducer

Making Rubber joint

100mm dia DI pipe

200mm dia DI pipe

250mm dia DI pipe

Testing of M.S./C.I./P.V.C./D.I pipes with hydraulic testing equipment by filling with water(including cost of water @ Rs.60/KL) and testing to recommended pressure in convenient stetches and attending the bursts if any occured during the test, excluding the cost of pipes, including other incidental and operational charges, etc., complete for the following diametres of pipes.

100mm dia DI Pipe

200mm dia DI pipe

250mm dia DI pipe

Hire charges for diesel pumpset for 5HP

Disjointing and refixing valves with tail pieces, etc., excluding excavation

100mm dia

200mm dia

250mm dia

Additional work of strom water crossing of DI water main pipes with PVC covering pipe including breaking and packing SWD concrete walls.

100mm dia

200mm dia

250mm dia

Rectification of damaged house service sewer connection

110mm dia U-PVC pipe

110mm dia PVC Coupler

Fitter (pipe laying/Bar bending ) II Class

Boring and Tapping mains or Re-boring and Tapping main and fixing brass screw plugs or ferrules of sizes.

15mm to 25mm (1/2” to 1”)

32mm to 50mm (1 ¼” to 2”)

Providing suitable dia non corrosive engineering plastic moulded Clamp Saddle with SS304 threaded metal insertedfor tapping outlet suiting for ½”,3/4”&1”clear bore and with wide plastic strap(EngineeringPlastic)withSS304 suitable bolts & nuts. Saddle to have sealing of Thermoplastic elastomeric (TPE) material around.

MDPE PE80 PN16 Blue pipe as per standards ISO4427and Tested as per BS6920 in WRC-NSF LTD, UK

Returning of old HDPE pipes to Stores of various size

50MM OD TO 110MM OD

125MM OD TO 200MM OD

200MM OD TO 315MM OD

Additional work of strom water crossing for house service water connection with PVC covering pipe including breaking and packing SWD concrete walls.

SCENARIO- 2: TBM Available

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 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.

For the Underground / Surface Assets along the roads for the distance ranging from: (2 Km to 5 Km)

For the Point Underground / Surface Assets along the roads

Sub Total

K.Mahendran (BID ID -1216614)

RAJU ENGINEERING ENTERPRISES (BID ID -1216620)