CNT/WSS/MWB/3468A/2022-23

Amount

Bill no. A Supplying and laying of RCC Encasing pipe of size 3000 mm dia (ID) and laying of 1900 mm dia MS transmission main for the proposed Trenchless crossing at km 8/7 of Inner Ring Road jn of Poonamallee High Road at Koyembedu Rountana, using trenchless technology for a length of 60 m

3000mm dia Trenchless Crossing

Manufacturing of 3000 mm (internal diameter) of pre cast RCC encasing pipe of M 40 design mix of length approximately 1.25 m with socket and spicot ends conforming to IS-458-2003 etc. complete with wall thickness of 250 mm as per the IS 458-2003 & approved drawings ( Type plan ) (All labour, materials, tools and plants, cement, reinforcement steel, shuttering materials, etc. are to be supplied by the tenderer / contractor at his own cost only) and transporting the same from the casting yard to pushing location including loading, unloading etc as directed by the Engineer-in-charge

Laying of the manufactured pre cast RCC pipe units of 3000mm internal dia through soil mass below the NH/SH by lowering the pipes into the drive pit by pipe pushing/jacking technique under traffic condition without infringing and without causing any hindrance to the movement of the trains using shield, hydraulic jacking system, driving rig etc. by excavating the earth from inside the pipe already laid and jointing the sipcot and socket ends of pipe units with rubber ring manila rope of minimum 20mm dia and with soft board between concrete faces including bailing out of water from excavated trenches, pits etc. during construction by mechanically and as specified etc.,duly provided as directed by the Engineers of Board

Provision of intermediate jacking stations with required number of jacks and power pack of suitable capacity installed in MS shells to be fitted in between two RCC Pipe segments at the designed / designated length to push 3000 mm dia RCC pipe from intermediate location to share the thrust load in the main jack ( ALL labour, materials,tools plants and equipments will be supplied by the tenderer/ contractor at his own cost only)

Laying of 1:2:4 mix concrete bed with the profile of 1900 mm MS pipe inside the 3000 mm RCC encasing pipe for entire length for smooth insertion and safety of the MS pipe .

Inserting 1900 mm dia MS service pipe in 3000 mm dia MS encasing pipe at an average depth of 6.0 m etc complete as directed by engineer incharge including conveying pipes from 530 MLD WTP, chembarambakkam plant to the site, cutting to the desired length of 2.5m providing necessary chamber at the pipe end and butt jointing etc., complete ( All labours tools and materials, plants and equipments for inserting pipes are to be supplied by the tenders/contractors at his own cost) Except the cost of 1900 mm dia MS pipes.

Provision of suitable M.S clamp to hold the MS transmission pipe with the encasing pipe to avoid the lifting of pipe during pumping

Grouting of the 3000 mm dia RCC encasing pipe line for water tightness including cost of labour , necessary incidencial charges etc., complete as directed by the Engineer Incharge.

Disposal of excavated earth and rubbish from the pipe portion duly loading into the contractor's own vehicles and disposing the same at nominated locations with all lead and lift etc. complete as specified and as directed by the Engineer (All labour, materials, tools and plants, road vehicles, with fuel and crew etc. are to be supplied by the tenderer/contractor only at his own cost).

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 1900mm dia hole on the RCC wall to lay the 1900mm dia pipe using core cutting method, disposing off the RCC cut portion and packing the gap with concrete after completion 1900mm dia pipe insertion through the gap, including cost of men, all mechineries (core cutting machine, crane, etc.,) hiring of DG set, consumables. etc., complete.

Bill no. B Laying of 1900 mm dia MS pipe for length of 16 m with in the chamber and by open cut method

Earthwork excavation and depositing on bank with initial lead of 10 metres and initial lift 2.00m in hard stiff clay stiff black cotton, hard red earth, shales, Muram, gravel, stoney earth and earth mixed with small size boulders S.S. 20-B including bailing out sub-soil water during excavation (excluding timbering )(Depth measured from GL) etc complete.

Greater than 2 m and upto 3 m

Greater than 3 m and upto 4 m

Greater than 4 m and upto 5 m

Providing shoring and strutting for excavated trenches to a depth of 5 m using wooden planks, sheet piles, strutts for protecting the trenches including cost and conveyance of all materials, labour charges and removal of all shoring and strutting at appropriate time.

Refilling the trenches with excavated earth including watering and consolidating to the desired compaction etc. complete.

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

Lowering, laying, jointing, Mild Steel pipes of nominal dia 1900mm, ID of shell 1925mm x 12mm wall thickness stated above including field welding as per IS specification,etc complete including all jointing materials etc complete as per specification and as directed by Board officials.

Testing of M.S./C.I./P.V.C./D.I pipes with hydraulic testing equipment by filling with water(including cost of water) 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 and commissioning MS pipes of nominal dia 1900 mm, ID of shell 1925mm x 12 mm wall preliminary air testing of joints and final hydraulic testing to the required pressure as per the specification etc complete including all jointing materials etc complete as per specification and as directed by Board officials.

Cutting of 1900 mm dia MS pipes

Bill no. C Construction of RCC Driving Pit of size 5m x 4.7m

Earth work excavation in hard stiff clay, stiff black cotton, hard red earth, shales, muram, gravel stoney earth and earth mixed with small size boulders as per SS 20B with initial lead of 10m and lift of 2.0m

Sinking 5 m x 4.7 m RCC chamber (inner) below water level including all incidental charges using special tools and plants such as air compressor, helmet etc., complete and including baling out water.

First depth of 2 metres

Second depth of 2 metres

Third depth of 2 metres

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 15 cm thick including ramming, curing etc. complete.

Providing and laying in position machine batched, machine mixed and machine vibrated design mix cement concrete of M35 grade for reinforced cement concrete structural elements under controlled water cement ratio with plasticiser using 20mm and down graded machine broken granite stone jelly excluding the cost of centering and shuttering and reinforcement but including curing, etc., as per standard specification and as directed by the Board officers complete.

upto 1.5 m from G.L

above 4.5 m and upto 9.00 m below GL

Providing form work with centering for soffits of reinforced cement concrete slabs or plain surfaces including strutting upto 3m high.

Supplying, fabricating and laying in position MS rounds or RTS rods for RCC works including cost of reinforcement, binding wire, cutting bending, cranking and tying in position with binding wire assembly, etc.

Supplying and fixing CI steps

Plastering with C.M.1:3 for 20 mm thick including curing etc., complete.

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

Disposal of surplus earth

Providing and fixing L.S. cover and frame of size 60 x 60cm including necessary masonry work and plastering, etc., complete.

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

Stock brick work with II nd class bricks in CM.1:6 (M-sand) for 23 thick wall including curing etc. complete

Bill no. D Construction of RCC Receiving Pit of size 5m x 4.7m

Earth work excavation in hard stiff clay, stiff black cotton, hard red earth, shales, muram, gravel stoney earth and earth mixed with small size boulders as per SS 20B with initial lead of 10m and lift of 2.0m

Sinking 5 m x 4.7 m RCC chamber (inner) below water level including all incidental charges using special tools and plants such as air compressor, helmet etc., complete and including baling out water.

First depth of 2 metres

Second depth of 2 metres

Third depth of 2 metres

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 15 cm thick including ramming, curing etc. complete.

Providing and laying in position machine batched, machine mixed and machine vibrated design mix cement concrete of M35 grade for reinforced cement concrete structural elements under controlled water cement ratio with plasticiser using 20mm and down graded machine broken granite stone jelly excluding the cost of centering and shuttering and reinforcement but including curing, etc., as per standard specification and as directed by the Board officers complete.

upto 1.5 m from G.L

above 4.5 m and upto 9.00 m below GL

Providing form work with centering for soffits of reinforced cement concrete slabs or plain surfaces including strutting upto 3m high.

Supplying, fabricating and laying in position MS rounds or RTS rods for RCC works including cost of reinforcement, binding wire, cutting bending, cranking and tying in position with binding wire assembly, etc.

Supplying and fixing CI steps

Plastering with C.M.1:3 for 20 mm thick including curing etc., complete.

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

Disposal of surplus earth

Providing and fixing L.S. cover and frame of size 60 x 60cm including necessary masonry work and plastering, etc., complete.

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

Stock brick work with II nd class bricks in CM.1:6 (M-sand) for 23 thick wall including curing etc. complete

UNIQUE CONSTRUCTIONS COMPANY