WBPWRD/EE/PHD/eNIT-04/25-26/7

Earth work in excavation of foundation of structures as per drawing and technical specification, including setting out, removing, spreading or stacking of spoils within a lead of 150 m. as directed and including trimming the sides of the trenches, leveling, dressing and ramming the bottom, and backfilling with approved material complete as per direction of the Engineer-in-Charge .In all sorts of soil excluding marshy soil & rocks (soft or hard) by manual means. Up to 3m depth.(i) With pumping out water including shoring as required.

Sand filling in foundation trenches and at the back of abutments, wing-walls etc. with good local sand free from earth in layers not exceeding 15 cm. including inundating each layer by profuse water and poking and ramming layer by layer complete including supply of sand. Quality of sand is to be approved by the Engineer-in-charge. (Using fine sand)

Providing and laying Design Mix concrete for plain / reinforced concrete work in any part of bridge (excluding bottom plugging) with coarse aggregates of appropriate nominal size and grading, fine aggregate (sand) conforming to proper grading zone, both of approved quality and cement, as necessary, including labour, cost and carriage of all materials and including preparation of design mix, approval of the same by the Engineer-in-Charge and cost for quality control, sampling, testing etc. all complete but excluding cost of labour and materials for formwork & reinforcement works. Using concrete mixer, (PCC Grade M-15)

Plain / Reinforced Cement Concrete in Substructure with coarse aggregates of appropriate nominal size and grading, fine aggregate (sand) conforming to proper grading zone, both of approved quality, cement and water reducing admixtures, as necessary, including labour, cost and carriage of all materials and including preparation of design mix, approval of the same by the Engineer-in-Charge and cost for quality control, sampling, testing etc. all complete as per drawing and technical specification including the cost of necessary form work and staging complete as per drawing and technical specifications. PCC Grade M-20, Using concrete mixer.

Providing and laying boulders apron on river bed for protection against scour with stone boulders weighing not less than 40 kg each complete as per drawing and Technical specification. Boulder Laid Dry Without Wire Crates.

Hire and labour charges for staging with sal bullah for super structure of bridge (Major and Minor) including stripping off and removing clearing on completion of work as per design and drawing approved by the Engineer-in-charge

Cleaning the exposed corroded Reinforcement as well as wron out concrete by sand blasting with air compressure including all materials, hire charges of machineries and labour etc. all complete as per technical specification and direction of the Engineer-in-Charge

Providing anti corrosive protective coating to inhibit the corrosion to HYSD Reinforcements including two coats of anti corrosive coatings of consumption as per the Manufacturers specification , cleaning etc complete as per the direction of the Engineer In Charge.

Removing corroded worn out portion of reinforcement (when the area of baris damaged by more than 25%) by cutting and replacing the same by a newplain round bar of requisite diameter by binding with required lap / weldingwith old bar, including cost of reinforcement, complete in all respectincluding removing unserviceable materials from site as per direction of theEngineer - in - charge. Note : Payment on weight (Kg.) of new reinforcement.

Epoxy bonding of new concrete to old concrete entire surface of piers/walls

Removal of defective concrete, cleaning the surface thoroughly, applying the shotcrete mixturemechanically with compressed air under pressure,comprising of cement, sand, coarse aggregates,water and quick setting compound in theproportion as per clause 2807.1., sand and coarseaggregates conforming to IS: 383 and table 1 of IS:9012 respectively, water cement ratio ranging from0.35 to 0.50, density of gunite not less than 2000kg/cum, strength not less than 25 MPa andworkmanship conforming to clause 2807.6. (40 mmaverage thickness)

Guniting concrete surface with cement mortar (25 mm nominal thick) applied with compressor after cleaning surface and spraying with epoxy complete as per Technical pecification.)

Providing and inserting nipples with approved fixing compound after drilling holes for grouting as per Technical specifications including subsequent cutting/removal and sealing of the hole as necessary of nipples after completion of grouting with Cement/Epoxy.

Sealing of cracks / porous concrete by injection process through nipples/Grouting complete as per Technical specification.Cement Grout

Welding by gas / electric plant including transportation of welding plant at site including cutting, forging & drilling to required shape.

Painting the vertical end faces of posts, wheel guards or railing or parapet with alternate bands of different colours as directed by the Engineer-in-charge with approved synthetic enamel paint. b) Two Coats

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