Bengaluru Water Supply And Sewerage Board Tender

a03 - Excavating of ramming/jacking/driving pit and receiving pit of size 5.00m(length) x 3.00m (breadth), up to 6.00 m depth in all soil strata including shoring and strutting including cutting of Asphalt/CC/Macadam road surface and removing the excavated stuff with all lead and lifts. The work includes formation of CC/RCC of 1:3:6 with or without 20mm steel with suitable spacing. The work also to receive the impacts driving pushing operation of encasing pipe. The cost includes driving the horizontal bore by pushing/jacking methods (trenchless technology method) by using construction agencies' cranes, jacks, jacking materials, generator, welding machineries, compressor, jack hammer and other equipments etc., without interfering and causing any hindrance to the movement of traffic or any other vehicles, without any disturbances to the railway/road/canal formation etc., The cost also includes bailing / pumping of water where ever necessary without affecting any installation like water supply and sanitary pipeline/telephone cable, electric cables etc. The work comprises of water for curing, carriage and fixing charges, concrete up to plinth for erecting and conducting the hydraulic pushing arrangements apart from passing through and scooping the earth inside the pipes and pit and depositing and disposing the surplus earth to a designated/ approval place and levelling the site after completion of entire work as directed by Engineer in Charge. The rate is excluding the cost of MS pipes. Size up to 5 m X 3 m - depth up to 4 m

a04 - Installation of product pipe by manual jacking method - Manufactur ing, providing, transporting, rolling, lowering, laying & jointing, testing, commissioning of ERW (Electric Resistance Welded), SAW (Submerged Arc Welded) MS pipe (Fe-410 grade) conforming to IS 3589-2001 with latest ammendments including perfect linking welding of joints to correct position including cost and conveyance of pipes and materials with all lead ,lift, cost of labour, loading and unloading of pipes for the following diameters with specified thickness of plate as noted below including bailing out of water wherever necessary for laying of carrier pipe of suitable dia including inside and outside of casing pipe painted with two coats of Anti corrossive tankmastic paint. Installation of steel pipe by Ramming / Jacking method to cross Railway track / NH /BDA /BBMP/Other roads/Existing utilities / NALA crossings, filling the gap between casing pipe and carrier pipe with quarry grit using compressor with all necessary equipments, plants etc, complete. Suitable spacers of HDP/MS or other similar material should be provided in between carrier & casing pipe to prevent carrier pipe forming metallic contact with casing pipe. Note : a. The cost of jacking is inclusive of cost M.S. casing pipe of specified thickness b. The cost of carrying pipe is separate and provision shall be made as per site requirement c. The cost of Jacking includes all leads lifts, cost of consumables, fuel charges, labour. d. The cost of jacking and receving pits shall be proposed seperatelly as per site requirement. Jacking of 1000 mm dia & 16mm thick M.S. Casing Pipe.

a05 - Earth work excavation for pipeline trenches in all kinds of soils by mechanical means above 600 mm trench width as per drawing and technical specifications, including setting out, construction of shoring, strutting, barricading, caution lights, bracing, using sight rails & boning rods at every 100 mm whevere necessary as directed, removal of stumps and other deleterious matter, dressing of sides and levelling the bottom of trench to the extent required , utilising the available excavated earth locally for the work etc., and all other appurtenances complete in the following strata.

a05a - Depth exceeding 1.5 m, but not exceeding 3 m

a05b - Depth exceeding 3m, but not exceeding 4.5m

a06 - Earth work excavation for pipeline trenches in all kinds of soils by mechanical means as per drawing and technical specifications, including setting out, construction of shoring, strutting, barricading, caution lights, bracing, using sight rails & bonding rods at every 100 mm wherever necessary as directed, removal of stumps and other deleterious matter, dressing of sides and levelling the bottom of trench to the extent required , utilising the available excavated earth locally for the work etc., and all other appurtenances complete in the following strata (Without Requiring Blasting) 15% earth work Qty ( For 0.00 to 1.50 mtr Depth)

a06a - 15 percent of earth work Qty (For 1.50 to 3.00 mtr Depth)

a06b - 15 percent of earth work Qty For 3.00 to 4.50 mar Depth

a07 - Providing and Filling in foundation with granite / trap broken metal 100mm. and down size & with approved sand including hand packing, ramming, watering, including cost of all materials and labour with all lead and lift complete as per specifications

a08 - Supplying S&S RCC SPUN / VIBRATED CAST PIPES (REINFORCED) pipes NP-3 Class conforming to IS:458-1988 with latest amentments using ordinary portland cement, for sanitary works and conveying to work site, rolling and lowering into trenches, laying true to line and levelg including loading and unloading at both destinations and jointing of pipes and specials, perfect linking of joints with jack to correct position including cost of jointing materials, i.e, rubber rings conforming to IS: 5382 for S&S RCC pipes, with all leads and lifts as directed and giving necessary hydraulic test as per ISS to the required pressure and commissioning etc. complete. (Contractor will make his own arrangements for procuring water for testing). Before the execution of the work, the contractor shall carry out the survey. 450 mm Dia RCC NP-3 Pipe

a08a - 600mm Dia RCC NP-3 Pipes. For Pipejacking Portion

a09 - Connecting the existing lateral connections to the proposed / existing Sewer Mains, including earth work excavation in all soils, lowering, laying, barricading, dewatering, jointing RCC-NP3 Class pipes refilling with excavated / borrowed earth, carting of excavated earth upto a minimum distance of 25Km away from the site, complete as directed by the Engineer. For sewer of 300mm dia to 400 mm dia of Pipe

a10 - Construction of RCC Machinehole chambers of 1:1.5:3 proportion or approved type Cast-insitu / Pre-cast RCC Machinehole chambers, constructed using form vibrators of standard type, with barricading, danger lighting and using of sight rails and boning rods wherever necessary, shoring and strutting wherever required using Ordinary Port Land Cement, using 1:1.5:3 proportion RCC with 20 mm and down graded jelly, well graded sand and steel of approved quality, 200 mm thick top concrete slab, having wall thickness and raft thickness as in approved drawings and with an offset in raft alround the chamber as in approved drawing, benching concrete with 1:6 slope towards the central drain finished smooth, including fixing and grouting of pipes, including conveying to work spot supply and fixing SFRC Machinehole cover and frame (Heavy duty) conforming to IS:12592 with latest amendments, on a bed of CC 1:2:4 Providing and fixing of minimum 3 mm thick encapsulated plastic footsteps (as per IS 10910) on 12 mm dia. Grade Fe-500 steel bar (as per IS 1786) staggered at 300 mm apart as detailed in Technical specifications, including stone grit beding wherever required, watering, curing, engraving Machinehole number with flow direction on the inner cylindrical surface etc., complete including cost of reinforcement steel and fabrication charges and also cost and conveyance of all materials, labour with all lead and lifts. The Pre-cast RCC Machinehole are for various diamters and depths as stated below and as per detailed drawings, specifications and direction of the Engineer

a10a - For Every 0.1m depth 2.00 to 3.00m

a10b - Constructing RCC Circular Machinehole 1.5 m internal dia. & 3.0 M depth includ. SFRC F&C,

a10c - For Every 0.1m depth 3.00 to 4.00m,

a10d - Constructing RCC Circular Machinehole 1.5 m internal dia. & 4.0 M depth includ. SFRC F&C

a10e - For Every 0.1m depth 3.00 to 4.00m,

a11 - Refilling available earth around trenches/pipelines, cables in layers not exceeding 20 cms in depth, compacting each deposited layer by ramming after watering with a lead upto 50 m , and lift upto 1.5 m. Including cost of all labour complete as per specifications

a12 - Removal of Unserviceable Soil with Disposal upto a suitable distance as directed by the Engineer incharge of work

a13 - Dewatering the sewage / storm water by using reqired HP submersible pump for the diversion of storm / sewage during the execution of work. Considering for one Pump.10 hp pump

a14 - Providing, filling and laying of sand bags filled with sand / clay for diversion of sewage during execution of work

a15 - Providing Random rubble masonry with hard stone in foundation and plinth including levelling up with cement concrete 1:6:12 (1 cement : 6 coarse sand : 12 graded stone aggregate 20 mm nominal size) upto plinth level with

a16 - Providing Coursed rubble masonry (second sort) with hard stone in foundation & plinth with Cement mortar 1:6 (1 cement : 6 coarse sand).

a18 - roviding, laying, spreading and compacting graded stone aggregate to wet mix macadam specification including premixing the Material with water at OMC in mechanical mix plant carriage of mixed Material by tipper to site, laying in uniform layers with paver/grader in sub-base / base course on well prepared surface and compacting with vibratory roller to achieve the desired density

a19 - Providing and applying primer coat with SS1 grade Bituminous Emulsion on prepared surface of granular Base including cleaning with mechanical Broom of road surface and spraying primer at the rate of 0.90 kg/m2 using mechanical means

a20 - Providing and laying Bituminous Macadam with 120 tphcapacity hot mix plant batch type using crushed aggregates of specified grading premixed with bituminous binder VG-30 @ 3.3% by weight of mix, transported to site, laid over a previously prepared surface with mechanical paver finisher to the required grade, level and alignment and rolled as per clauses 501.6 and 501.7 to achieve the desired compaction

a21 - Providing and applying tack coat with RS1 Bituminous Emulsion using emulsion pressure distributor at the rate of 0.20 kg/m2 on the prepared bituminous surface cleaned with mechanical broom

a22 - Providing and laying Bituminous Concrete with 120 TPH capacity hot mix plant batch type using crushed aggregates of specified grading, premixed with bituminous binder VG-30 @ 5.2 per cent of mix and filler, transporting the hot mix to work site, laying with mechanical paver finisher to the required grade, level and alignment, rolling with smooth wheeled, vibratory and tandem rollers to achieve the desired compaction as per MORTH specification clause No. 507 complete in all respects

a17 - Providing M sand supplying and filling in plinth, foundations/ UG cable work with approved M sand including watering, ramming, consolidating and dressing. The rate include cost of the material, labour charges required tools and plants complete. Work shall be carried out as per the Engineer in charge of the work