Construction of RCC Bridge No.2/1 over River Singibeel on Memberchuk to Jariguri Road with approach and protection works under SOPD (G) for the year 2020-21 under Jonai Territorial Road Division, Silapathar

Amount

Plain/Reinforced cement concrete in substructure complete as per drawing and technical specification clause 802, 804, 806, 807 and 1204. RCC Grade M 20 (I) Height upto 5.00 m Case-I Using concrete Mixer

Supplying , fitting and placing HYSD bar reinforcement in substructure complete as per drawing and technical specification clause as per clouse 1002, 1005,1010 and 1202.

Supplying, fitting and fixing in position true to line and level elastomer bearing conforming to IRC : (83 Pt.-II) Section ix and clause 2003 of MORTH Specifications complete including all accessories as per drawing and technical specifications as per MORTH Section 2000 , 2200

Providing and laying reinforced cement concrete in superstructure as per drawing and technical specification clause 800, 1205 and 1205.5 with crushed stone . II. RCC Grade M 25 (I) Height upto 5.00 m Case-I Using concrete Mixer

Supplying , fitting and placing HYSD bar reinforcement complete as per drawing and technical specification clause as per clouse 1002, 1005,1010 and 1202.

Providing and laying cement concrete wearing coat M-30 grade including reinforcement complete as per drawing and Technical Specification Clause 800 and 1206.3. With natural gravel

Construction of RCC railing of M-25 grade cost-in-site with 20mm nominal size aggregate, ture to line and grade, tolerance of vertical railing post not to exceed 1 in 500, centre to centre spacing between vertical posts not to exceed 2000mm as per drawing and technical specifications clauses 800, 900 and 1208.3.

Providing Draiage Spouts complete as per approved drawing and Technical Specification Clause 1209.

Reinforced cement concrete approcah slab M 25 including reinforcement and formwork complete as per drawing and technical specification clause 800, 1211 A. With crushed stone © With other ISI marked TMT grade rebar

Providing and laying buried expansion joint covered with 12 mm thick , 200 mm wide galvanised weldable 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 galvanshed nails space 300 mm c/c along the centre line of plate as per technical specification clause 1207.2.3.

Filter Joint: Providing and fixing in position 20 mm thick premoulded joint filter in expansion joint for fixed ends of simply suported span, coverd sealant complete as per drawing and technical specification.

Clearing and grubbing road land including uprooting wild vegetation, grass, bushes, shrubs, saplings and trees girth upto 300mm, removal of stumps of such trees cut earlier and disposal of unserviceable materials and stacking of serviceable material to be used or auctioned, upto a lead of 1000m including removal and disposal of top organic soil not exceeding 150mm in thickness as per Technical Specification Clause 201.i) By Manual means. A) In area ofnon thormy jungle

Construction of embankment with approved material obtained from borrow pits with a lift upto 1.5 m, transporting to site, spreading, grading to required slope and compacting to meet requirement of Tables 300.1 and 300-2 with a lead upto 1000 m as per Technical Specification 301.5

Construction of subgrade and earthen shoulders with approved materials obtained from borrow pits with all lifts and leads, transporting to site, spreading, grading to required slope and compacted to meet requirement of Table 303.1

Construction of Granular Sub-base by providing well graded material, spreading in uniform layers with motor grader on prepared surface, mixing by mix in place method with rotavator at OMC, and compacting with smooth wheel roller to achieve the desired density, complete as per Technical Specification Clause 401. ( I ) For Grading II Material

Providing, laying, spreading and compacting stone aggregate of specific sizes to water bound macadam specification including spreading in unirorm thickness, hand packing, rolling with three wheel 80-100 kN static roller in stages to proper grade and camber, applying and brooming, stone screening/binding materials to fill-up the interstices of coarse aggregate, watering and compacting to the required density Grading II as per Technical Specification Clause 405.Grading II

Providing, laying, spreading and compacting stone aggregate of specific sizes to water bound macadam specification including spreading in unirorm thickness, hand packing, rolling with three wheel 80-100 kN static roller in stages to proper grade and camber, applying and brooming, stone screening/binding materials to fill-up the interstices of coarse aggregate, watering and compacting to the required density Grading III as per Technical Specification Clause 405.Grading III

Prime coat low porosity: Providing and applying primer coat with bitumen emulsion) on prepared surface of granular base including clearing of road surface and spraying primer at the rate specified Quantity . using mechanical means (including cost testing of materials at site and laboratory as directed by the Deptt. A. Primer @ 0.60 Kg per sqm

Providing and applying tack coat with bitumen emulsion using emulsion distributor at the rate of 0.20 Kg per Sq.m. on the prepared dry and hungry bituminous surface cleaned with Hydraulic broom as per Technical Specification Clause 503.

Providing laying, rolling of open-graded premix surfacing of 20mm thickness composed of 13.2 mm to 5.6mm aggregates either using penetration grade/ modified bitumen or cut back or emulsion to required line, grade and level to serve as wearing course on a previously prepared base, including mixing in a suitable plant, laying and rolling with a smooth wheeled roller of 8-10 ton capacity to the required level and grade to be follwed by seal coat of either Type A or Type B or Type C as per technical specification clause 508

Providing and laying seal coat sealing the voids in a bituminous surface laid to the specified levels, grade and cross fall using Type-A, Type B Type C as per Technical Specification Clause (a) Without Anti Stripping agent case-Ii Type B (Providing and laying of premix seal coat with HMP of appropriate capacity not less than 75 tonnes/hours using crushed stone chiping 6.7 mm size and penetration bitumen of 60/70 or VG-30 grade

Providing and laying of boulder apron on river bed protection against scour with stone boulders weighing not less than 40 Kg each complete as per drwaing and and technical specification Clause No.2503 of MORTH specification of Roads and Bridges works

Om Prakash Agarwalla