Construction of 19.75 mtr. span bridge over Nagdyara Nallah on Machhyal Bhararoo Bihun road under SCSP head

Amount

Super-structures: Earth work in excavation for structures other than bridge in all depths as per drawing and technical specification clause 305.1 including setting out, construction of shoring and bracing, removal of stumps and other deleterious materials and disposal in all lead and lift including dressing of sides and bottom and back filling in trenches with excavated suitable materials. All work of rock cutting by blasting shall be carried out by taking all necessary precautions against soil erosion damage to hill side water pollution etcetra and to protect stability of hill side rock shall be excavated with chiseling and wedging out rock (where blasting is prohibited). All earth work in cutting/excavation including rock excavation shall be carried out true to lines grades, side slopes, width, camber super elevation and level as shown on the drawings or as directed by the Engineer-in-Charge hauling and stacking of materials useful for construction at suitable sites and safe disposal of unsuitable cut materials in specified manner filling of unevenness blind age and finishing of the road to specified dimension or as directed by the Enginer-in-Charge. If the foundation of the structure is in an area with stagnant water or water is met with in the excavation due to spring seepage rain and other causes it shall be remove by suitable diversion bailing out or pumping as directed and the area of the foundation or embankment shall be kept dry. Any loss to the public or private property during the course of excavation shall be the sole responsibility of the contractor which shall have to be duly compensated by him at his own cost in all cases.

Upto 3 Mtr. Depth

above 3mtr to 6 mtr. Depth

Providing and laying mechnically mixed and vibrated plain cement concrete 1:3:6 (one cement:three sand: six graded/crushed stone aggregatein 40mm (forty millimetre) nominal size) in foundations and compacted by vibration including form work and curing complete within all leads, lifts carriage of material and other incidentials, as per clause 2104.

Providing and laying mechnically mixed and vibrated plain cement concrete Grade M-15 (fifteen) in sub structure including form works in any height complete as per drawing and technical specifications and curing complete within all leads, lifts carriage of material and other incidentials as per clause 1500, 1700 and 2200.

Providing and laying plain reinforced cement concrete Grade M-25 (twenty five) in sub structure including form works in any height complete as per drawing and technical specifications and curing complete within all leads, lifts carriage of material and other incidentials.

Supplying, fitting and placing HYSD bar reinforcement in sub-structure complete as per drawing and technical specifications including carriage of material within all leads, lifts and other incidentals as per clause 1600 and 2200.

Back filling with granular material behind abutments, wing wall and return wall complete as per Drawing and technical specifications clause 1204.3.8 complete within all leads, lifts carriage of material and other incidentials.

Supplying, fitting and fixing in position true to line and level cast steel rocker bearing conforming to IRC:83 (pt.I) section IX and clause 2003 of MORTH specifications complete including all accessories as per drawing and technical specifications and carriage of material within all leads, lifts/depths and other incidentals as per clause 2000, 1000 and 2200.

Supplying, fitting and fixing in position true to line and level forged steel roller bearing conforming to IRC:83 (pt.I) section IX and clause 2003 of MORTH specifications complete including all accessories as per drawing and technical specifications and carriage of material within all leads, lifts/depths and other incidentals as per clause 2000, 1000 and 2200.

Providing weep hole in brick masonry/ plain/ reinforced concrete abutment , wing wall, return wall with 100mm dia. AC pipe, extending through the full width of the structures with slope of 1V:20H towards drawing face complete as per drawing and technical specifications and carriage of material within all leads, lifts/depths and other incidentals as per clause 2706 and 2200.

Super-structures

Furnishing and Placing mechanically mixed and vibrated reinforced cement concrete grade M-30 in super-structure for T-beam and slab including form work and stagging up to any height as per drawing and Technical Specification and curing complete within all leads, lifts carriage of material and other incidentials..

Providing and laying reinforced cement concrete approach slab including reinforcement and formwork complete as per drawing and Technical specifications curing complete within all leads, lifts carriage of material and other incidentials as per clause 1500, 1600, 1700 and 2704.

Providing and laying mechanically mixed and vibrated cement concrete wearing coat M-30 (thirty) grade including reinforcement and form work complete as per drawing and Technical Specifications curing complete within all leads, lifts carriage of material and other incidentials as per clause 2702.

Supplying, fitting and placing HYSD bar reinforcement in super structure complete as per drawing and technical specifications including carriage of material within all leads, lifts and other incidentals

Construction of RCC railing of M30 (thirty) grade in-situ with 20 mm(twenty millimetre) nominal size aggregate, true to line and grade, tollurence of vertical RCC post not to exceed 1 in 500 (one in five hundred), centre to centre spacing between vertical post not to exceed 2000 mm (two thousand millimetre), leaving adequate space between vertical post for expansion, complete as per approved drawings and technical specifications including carriage of material within all leads, lifts and other incidentals as per clause 2703, 1600, 1500 and 1700.

Providing drainage Spouts complete as per drawing and Technical specifications including carriage of material within all leads, lifts and other incidentals as per clause 2705 .

Providing and laying a burried expansion joint, expansion gap being 20 mm (twenty millimetre), covered with 12 mm (twelve millimetre) thick, 200 mm (two hundred millimetre) wide galvanised wieldable structural steel plate as per IS: 2062, placed symmetrical to centre line of the joint, resting freely over the top surface of the deck concrete, welding of 8 mm dia. 100 mm long galvanised nails spaced 300 mm c/c along the centre line of the plate, all as specified in clause 1207.2.3 including carriage of material within all leads, lifts and other incidentals.

Providing and fixing in position 20 mm (twenty millimetre) thick premoulded joint filler in expansion joint for fixed ends of simply supported spans not exceeding 10 (ten) metre to cater for a horizontal movement upto 20 mm (twenty millimetre), covered with sealant complete as per drawing and technical specifications as per clause 2705 including carriage of material within all leads, lifts and other incidentals.

Providing and filling joint sealing compound as per drawings and technical specifications with coarse sand and 6 (six) per cent bitumen by weight including carriage of material within all leads, lifts and other incidentals as per clause 2605.

Metalling & tarring

Water Bound Macadam with sub base/base. 1) WBM Grading 1. Providing, laying, spreading and compacting stone aggregates of specific sizes to water bound macadam specification including spreading in uniform thickness, hand packing, rolling with three wheel 80-100 kN static roller in stages to proper grade and camber applying and brooming stone screening/ninding materials to fill-up the interstices of coarse aggregate, watering and compacting to the required desity Grading 1 as per technical specification clause 405. By Manual Means

Water Bound Macadam with sub base/base. 2) WBM Grading 2. Providing, laying, spreading and compacting stone aggregates of specific sizes to water bound macadam specification including spreading in uniform thickness, hand packing, rolling with smooth wheel roller 80-100 kN in stages to proper grade and camber applying and brooming to fill-up the interstices of coarse aggregate, watering and compacting to the required desity Grading 2 as per technical specification clause 405. By Manual Means

Water Bound Macadam with sub base/base. 3) WBM Grading 3. Providing, laying, spreading and compacting stone aggregates of specific sizes to water bound macadam specification including spreading in uniform thickness, hand packing, rolling with smooth wheel roller 80-100 kN in stages to proper grade and camber applying and brooming, stone screening to fill-up the interstices of coarse aggregate, watering and compacting to the required desity Grading 3 as per technical specification clause 405. By Manual Means

Prime Coat. Low Porosity. Providing and applying primer coat with bitumen emulsion (SS-1) on prepared surface of granular base including cleaning of road surface and spraying primer at the rate of 0.70-1.00 kg/sqm using mechnical means as per technical specification Cluase502

20mm thick open-graded premix carpet using bituminous (penetration grade/modified bitumen) binder. Providing, laying and rolling of open graded premix carpet of 20mm thickness composed of 13.2mm to 5.6mm aggregates either using penetration grade bitumen or emulsion to required line, grade and level to surve as wearing couase on a previously prepared base, including mixing in suitable plant, laying and rolling with a three wheel 80-100 kN static roller capacity, finish to requried level and grades to be followed by seal coat of either type A or type B or type C as per technical sepcification Clause 508. By Mechnical Means. Bitumen (S-90)

Seal Coat. Providing and laying seal coat sealing the voids in a bituminous surface laid to the sepcified levels, grade and crossfall using Type A, Type B & Type C as per technical specificaiton Clause 510. By Mechnical Means Type-B. Bitumen (S-65).

Providing and laying concrete for plain / reinforced concrete in open foundations complete as per drawing and technical specification clauses 802,803,1202 & 1203. P.C.C. nominal mix 1:5:10 ( 40mm aggregates)

Approaches

Excavation in soil in hilly area by mechanical means including cutting and trimming of side slopes and disposing of excavated earth with a lift upto 1.50 metres and a lead upto 20.00 metres as per technical specification clause 1603.1.Pick work

Providing and laying concrete for plain / reinforced concrete in open foundations complete as per drawing and technical specification clauses 802,803,1202 & 1203. P.C.C. nominal mix 1:5:10 ( 40mm aggregates)

Back filling with granular material behind abutments, wing wall and return wall complete as per Drawing and technical specifications clause 1204.3.8 complete within all leads, lifts carriage of material and other incidentials.

Providing and laying filter media with granular crushed aggregates as per specification to a thickness of not les than 600mm with smaller size towards the soil and bigger size towards the wall and providing over the entire suface behind abutment, wing wall, return wall to the full height, compacted to firm condition complete as per drawing and technical specification Clause 1204.3.8

Providing weep hole in brick masonry/stone masonry/plain reinforced concrete abutment, wing wall, return wall with 100mm diametre AC pipe extending through the full width of the structures with slope of 1(V):20(H) (one vertical ratio twenty horizontal) towards drawing face complete as per drawing and technical specifications clauses 614,709,1204.3.7

RAKESH SHARMA