Execution of Sewer Line by Trenchless and open cut method and its appurtenant works Sewer Connection to existing sewerage network including survey and design etc at Chaksha Nagar in Dehradun City

Amount

Excavation of earth below G.L. by manually or by mechanical means for laying of Sewers, Man-Holes, Gully Pits, Chambers etc. in soil including extra excavation below inverts, trimming & dressing of sides, levelling and back filling of trenches by excavated earth in 20 cm layers,watering and ramming the same including removal of surplus earth or other dismantled material up to a distance of 50 meters from the center of trenches and cleaning of site properly after completion of the work. Excavation by mechanical means shall be restricted upto 90 cm above invert levels at every point of excavation. Excavation from invert levels to 90 cm above shall be done by manually only.

Ordinary soil

0 to 1.5 m below G.L

1.5 to 3.0 m below G.L

3 to 4.5 m below G.L

Provide & fixing of Close Timbering in trenches for the following depths below ground level consisting of 40mm thick approved country wood planks for poling board, 125mm × 75mm Indian Salwood walers and 100 mm dia Sal wood ballies for struts at 1.50m interval including removal after laying of sewer(both sides of trenches will be taken as one side for the purpose of payments & measurements i.e. area equals to length x depth of trenches. Dismantled timbering materials will be the property of the contractor.

Depth upto 3 m below G.L

3 m to 6 m below G.L

Provide & fixing of Open Timbering (covering1/3rd of surface area by planks), in trenches for the following depths below ground level consisting of 40mm thick approved country wood planks for poling board, 125mm × 75mm Indian Salwood walers and 100 mm dia Sal wood ballies for struts at 1.50m interval including removal after laying of sewer(both sides of trenches will be taken as one side for the purpose of payments & measurements i.e. area equals to length x depth of trenches. Dismantled timbering materials will be the property of the contractor.

Depth upto 3 m below G.L

Supply & Laying - Jointing of following dia. R.C.C. S&S pipes with rubber gaskets to the site of work, lowering the same into trenches below ground level true to alignment, making the joints with rubber gaskets and with necessary spun yarn soaked in bitumen jointing with 1:2 cement mortar in coarse sand including cost of all jointing materials and testing etc. complete but excluding excavation and backfilling of trenches upto ground level.

R.C.C. S&S Non Pressure Pipe class Conforming To IS : 458-2003

Class- NP3

150 mm dia

0 - 1.5 m depth

200 mm dia

1.5 - 3 m depth

3 - 4.5 m depth

Providing laying and jointing of following size sewer pipeline (as per IS 3589) by Auger boring machine including survey of underground utility and accordingly preparation of design and drawing for laying of pipe line, construction of thrust and receiving pit of required size and required depth including sheeting, strutting as where ever required, construction of thrust block required for pushing the pipe including excavation, dewatering, back filling of pit, cutting bituminous surface, WBM, CC road if any and disposal of surplus earth and rubbish as directed by engineer in charge. Pipe should be polyurethene (PU) coated inside and bitumen anti corrosive coated outside and laying at a required depth and true alignment and gradient.

M.S 700 mm dia 10mm thick casing pipe ( as per IS: 3589 ) and 200 mm DI K-7 carrier pipe

Dismantling manually/ by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of Engineer-in-charge

Bituminous road

Demolishing cement concrete manually/ by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in - charge.Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

Constructing Brick Masonry Manhole of various dia and depth as per IS :4111 par1( latest ammendment) in FPS brick class designation M-100 in Cement Mortar 1:5 (1 cement : 5 coarse sand) including nside and outside 15mm thick plastering in cement mortar 1:3(1 cement : 3 coarse sand) finished with a floating coat of neat cement inside only. The work includes excavation, dewatering, planking, strutting etc. refilling, disposal of surplus earth with all lift and lead of 50m, Including construction of concrete base with PCC 1:4:8 (1 cement : 1 coarse sand : 4 stone aggregate 40mm nominal size), preparation of channal up to the height of'the'pipe and benching in PCC 1:2:4 (1 cement : 2 coarse sand : 4 stone aggregate 20mm nominal size) including neat cement finished, suitable connection of inlet & outlet pipes, testing (watertightness} of manhole, curing etc. complete as per specification and drawing and as per entire satisfaction of Engineer-in-Charge (the depth of manhole will be measured from the invert of the pipe to top of the manhole cover).

900mm internal diameter at bottom,0.90-1.65m depths

1200mm internal diameter at bottom,1.65-2.30m depths

1500mm internal diameter at bottom,2.30-4.95m depths

Deduction in the depth of the manhole to regulate payments for variation of actual depth of manholes in following sizes.

900mm internal diameter at bottom,0.90-1.65m depths

1200mm internal diameter at bottom,1.65-2.30m depths

1500mm internal diameter at bottom,2.30-4.95m depths

Road Reinstatement work Providing and laying in position machine batched and machine mixed design mix M-25 grade cement concrete for reinforced cement concrete work, using cement content as per approved design mix, including pumping of concrete to site of laying but excluding the cost of centering,shuttering, finishing and reinforcement, including admixtures in recommended proportions as per IS: 9103 to accelerate, retard setting of concrete, improve workability without impairing strength and durability as per direction of Engineer-in-charge. (Note :- Cement content considered in this item is @ 330 kg/cum. Excess/ less cement used as per design mix is payable/recoverable separately).

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level :

1:3:6 (1 Cement : 3 coarse sand (zone-III) : 6 graded stone aggregate 20 mm nominal size)

Construction of granular sub-base by providing close graded Material conforming to specifications, mixing in a mechanical mix plant at OMC, carriage of mixed material by tippers to work site, for all leads & lifts, spreading in uniform layers of specified thickness with motor grader on prepared surface and compacting with vibratory power roller to achieve the desired density, complete as per specifications and directions of Engineer-in-Charge.With material conforming to Grade-III (size range 26.5 mm to 0.075 mm ) having CBR Value-20

Shifting of domestic water supply house connection coming in the alignment of sewer line/mahnole chamber including excavation, refilling, supply of all material, pipes, specials etc., labour, T&P and making good complete as per entire satisfaction of engineer in charge.

15 to 20mm G.I, Pipe

75mm to 110mm PVC Pipe

140mm to 160mm PVC Pipe

Provision for crossing sewers through existing drains coming across the alignment of sewer including making it good after laying the pipe.

Providing and erecting 2.00 metre high temporary barricading at site;each panel of size 2.50mx2.00m made of 40x40x6mm angleiron or 50x50x3mm hollow MS tube posts/horizontal members/bracings covered with 1.63mm thick MS sheet. The sheet shall be fixed with 30x5mm MS flat by suitable welding/riveting.The panels shall be made so that gap of 50cm above the ground is available making overall height as 2.5m. MS channel ISLC 75 @ 5.70 kg/m, 50cm long shall be provided at the bottom having oval shaped holes of size 50x25mm at both ends with 50cm long MS angle 40x40x6mm bracing. Suitable arrangement shall be made to fix the barricading to avoid from overturning by providing 250mm long expansion fasteners at both ends. The work shall be executed as per drawing/direction of Engineer-in-Charge which includes writing and painting, arrangement for traffic diversion such as traffic signals during construction at site for day and night, glow lamps, reflective signs, marking, flags, caution tape as directed by the Engineer-in-Charge. The barricading provided shall be retained in position at site continuously i/c shifting of barricading from one location to another location as many times as required during the execution of the entire work till its completion. Rate include its maintenance for damages, painting, all incidentals, labour materials, equipments and works required to execute the job. The barricading shall not be removed without prior approval of Engineer-in-Charge. (Note :- One time payment shall be made for providing barricading from start of work till completion of work i/c shifting. The barricading provided shall remain to be the property of the contractor on completion of the work).

Cartage of excavated earth from site to suitable place as per direction of engineer in charge by head load (the work being in narrow lanes) and carrying back for filling of trenchesafter laying and jointing the pipes up.to max distance 60 m one side

Cartage of materials by mechanical means including its loading unloading complete

Cartage upto 1st km (Taking 30% of total excavation of earth)

Disposal of surplus earth from the site of work upto a distance of 8.0 km. As directed by Engineer incharge including loading unloading and carting etc. all complete.

Provision for diversion and reparing of electric/telephone cables/wires wherever necessary including supply of all materials, labour, T&P etc. complete.

Shifting and repairing of telephone cables.

Shifting and repairing to electric poles/cables

Providing and spreading RBM i .e., River Bed Material (treated as granular sub-base /base/surface course material) in uniform layers with motor grader on prepared surface with rotavator and compacting with smooth wheeled roller to achieve the desired density.

SAFEENA ENTERPRISES