Repair and Rehabilitation of 12 nos. Bridges OF NH 512

Amount

Excavation in Soil by Manual Means:-Excavation for roadway in soil using manual means including loading in truck for carrying of cut earth to embankment site with all lifts and lead upto 1000 metres (Reference to MoRT&H's specification clause 301) and as per direction of Engineer-in-Charge.

Plain/Reinforced cement concrete in sub-structure complete as per drawing and Technical Specifications (Reference to MORT&H's specifications 1500, 1700 & 2200) and as per direction of Engineer-in-Charge. PCC Grade M15

Plain/Reinforced cement concrete in sub-structure complete all including vibrating and compacting, finishing, curing, sampling, testing etc. by mechanically mixed as per drawing and Technical Specifications (Reference to MORT&H's specifications 1500, 1700 & 2200) and as per direction of Engineer-in-Charge. PCC Grade M20 Height upto 5m

Cleaning the concrete surface by removing dirt and debris,marking defective locations and removing loose concrete bycareful stripping untill hard surface is exposed, cutting theconcrete to regular shape, wire brushing the exposed surfaceand removing debris from site complete and as per direction of the Engineer - in - Charge.

Plastering with cement mortar (1:3 ) on brick work in substructure as per Technical Specifications (Reference to MORT&H's specifications 1300 & 2200) and as per direction of the Engineer - in - Charge.

Brick masonry work with 1st class full size bricks except when necessary to complete the bond in cement morter 1:3 in sub-structure complete,including thoroughly soaking the bricks in a tank filled with water for a minimum period of one hour prior to being laid,protecting the green structure from rain by suitable covering and with a minimum Seven days curing etc.,but excluding pointing and plastering,as per drawing and Technical.Specifications.(Reference to MORT&H's specifications 1300 & 2200) and as per direction of the Engineer - in - Charge.

Backfilling behind abutment,wing wall and return wall complete including spriklring water and throughly compacted with plate compactor/power rammer in layers not exceeding 150 mm compacted thickness as per drawing and Technical Specification (710.1.4 of IRC:78 & MoRTH's specification 2200) Sandy material and as per direction of the Engineer - in - Charge.

Guniting concrete surface with cement mortar applied with compressor after cleaning surface and spraying with epoxy complete as per Technical Specification (Reference to MORT&H's specification 2807) and as per direction of the Engineer - in - Charge.

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.

Providing anti-corrosive treatment to HYSD reinforcement Providing anti-corrosive protective coating to inhibit the corrosion to HYSD reinforcements including two coats of anti-corrosive coatings of consumption as per manufacturer's specification, cleaning etc. complete as per the direction of the Engineer-in- Charge.

Epoxy bonding of new concrete to old concrete( crack/spalling shall be sealed with epoxy injection/grouting coating of epoxy resin @ 0.80kg /sqm should be applied (Reference to MORT&H's specification 2805) and as per direction of the Engineer - in - Charge.

Patching of damaged concrete surface with polymer concrete and curing compounds, initiator and promoter, available in present formulations, to be applied as per instructions of manufacturer and as approved by the Engineer (Reference to MORT&H's specification 2800) and as per direction of the Engineer - in - Charge. Thickness of patching = 25mm NB:--This item is a proprietory item available in market as pre-packed polymer concrete and is required to be applied as per instructions of the manufacturer.

Applying epoxy mortar over leached, honey combed and spalled concrete surface and exposed steel reinforcement complete as per Technical Specification (Reference to MORT&H's specification 2804) and as per direction of the Engineer - in - Charge. Thickness of epoxy mortar = 10mm

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 (Reference to MORT&H's specification 2800) and as per direction of the Engineer - in - Charge.

Sealing of crack / porous concrete with Epoxy Grout by injection through nipples complete as per clause 2803.1 (Reference to MORT&H's specification 2803) and as per direction of the Engineer - in - Charge.

Sealing of cracks/porous concrete ( within the limits of practical pressure 100 kpa -400 kpa until refusal ) by injection process through nipples/Grouting complete as per Technical Specification (Reference to MORT&H's specification 2806) and as per direction of the Engineer - in - Charge. Cement Grout

Plain/Reinforced cement concrete in sub-structure complete as per drawing and Technical Specifications (Reference to MORT&H's specifications 1500, 1700 & 2200) and as per direction of the Engineer - in - Charge. RCC Grade M25 Height upto 5m (Using concrete Mixer)

Supplying, binding, fixing etc. including initial straightening, cutting to requisite length, hooking and bending to correct shape, placing in proper postion of uncoated HYSD reinforcement bar in super-structure complete as per drawing and technical specifications (Reference to MORT&H's specification 1600) and as per direction of the Engineer - in - Charge.

Replacement of Expansion Joints complete as per drawings and as per direction of the Engineer - in - Charge.

Removal of existing asphaltic wearing coat comprising of 50 mm thick asphaltic concrete laid over 12 mm thick mastic asphalt including disposal with all lift and lead upto 1000 m (Reference to MORT&H's specification 2811) and as per direction of the Engineer - in - Charge.

Tack Coat : Providing and applying tack coat with Cationic bitumen emulsion (RS1) complying with IS:8887 using emulsion pressure distributor on the prepared bituminous/granular /cement concrete pavement surface cleaned with mechanical broom and high pressure air jet (Reference to MORT&H's specification clause 503) and as per direction of the Engineer - in - Charge. i)On bituminous surface @ 0.20kg0.3kg /sqm

Bituminous Concrete:- Providing and laying bituminous concrete with 100-120 TPH batch type hot mix plant using crushed aggregates of specified grading, premixed with bituminous binder (VG 30) of approved grade @ 5.2% (min) for Gr.-1 & @ 5.4% (min) for Gr.-2 , as per table 500-17, and mix design done as per table 500-10 and job mix formula as per cl. 505.3.3 and filler (hydrated lime), transporting the hot mix to work site, laying with a hydrostatic paver finisher with sensor control to the required grade, level and alignment, rolling with smooth wheeled, vibratory tandem roller and with pneumatic tyre roller of 12 to 15 tonne weight with a pressure at least 0.56 MPa as directed by E-I-C to achieve the desired compaction as per clause no 507.3.5 complete in all respects ref. to MORTH specification clause No.507. For Grade-2(13.2 mm nominal size), Layer thickness 30-40mm.

Mastic Asphalt:- Providing and laying 25 mm thick Mastic Asphalt wearing course with paving grade bitumen (VG 10) meeting the requirements given in the table 500-39, prepared by using mastic cooker and laid to reqired level and scope after cleaning the surface,including providing antiskid surface with bitumen precoated fine grained hard stone chipping of 13.2 mm niminal size at the rate of 0.005 cum per 10 sqm and at an approximate spacing of 10cm center to center in both directions,pressed into surface when the temparature of surface is not less tan 100 degree centigrade,productng 1 mm to 4 mm over masti surface, all complete as per clause 516(Reference to MORT&H's specification clause 516) and as per direction of the Engineer - in - Charge.

Providing and laying boulders apron on river bed for protection against scour with stone boulders weighing not less than 40 kg each template cross wall in dry wall masonry shall be built about a meter thick & to the full height of the specified thickness of appron at 30 mt. interval complete as per drawing and Technical specification (Reference to MORT&H's specification 2503) and as per direction of the Engineer - in - Charge. Boulder Laid Dry Without Wire Crates.

Geotextile Filter:- Laying of a geotextile filter between pitching and embankment slopes on which pitching is laid to prevent escape of the embankment material through the voids of the stone pitching/cement concrete blocks as well as to allow free movement of water without creating any uplift head on the pitching and as per direction of the Engineer - in - Charge.

Providing and laying Pitching on slopes laid over prepared filter media including boulder apron laid dry in front of toe of embankment complete as per drawing and Technical specifications (Reference to MORT&H's specification 2504) and as per direction of the Engineer - in - Charge. Stone/Boulder

Dismantling and removing of Damaged Concrete Railing and as per direction of the Engineer - in - Charge.

Construction of precast RCC railing of M30 Grade,aggregate size not exceeding 12mm,true to line and grade,tolerance of vertical RCC post not to exceed 1 in 500,centre to centre spacing between vertical post not to exceed 2000mm,leaving adequate space between vertical post for expansion,with a minimum 10 days curing complete as per approved drawing sand technical specifications (Reference to MORT&H's specifications 2703, 1500, 1600 & 1700) and as per direction of the Engineer - in - Charge.

Repair of RCC Railing:- Carrying out repair of RCC M30 railing to bring it to the original shape and as per direction of the Engineer - in - Charge.

Painting on concrete surface:-Providing and applying 2 coats of water based cement paint to unplastered concrete surface after cleaning the surface of dirt,dust,oil,grease,efflorescence and applying paint @ of 1 litre for 2 sqm (Reference to MORT&H's specification 800) and as per direction of the Engineer - in - Charge.

Metal Beam Crash Barrier (Reference to MORT&H's specification 811).Type - A, "W" : Metal Beam Crash Barrier :-Providing and erecting a "W" metal beam crash barrier comprising of 3 mm thick corrugated sheet metal beam rail, 70 cm above road/ground level, fixed on ISMC series channel vertical post, 150 x 75 x 5 mm spaced 2 m centre to centre, 1.8 m high, 1.1 m below ground/road level, all steel parts and fitments to be galvanised by hot dip process, all fittings to conform to IS:1367 and IS:1364, metal beam rail to be fixed on the vertical post with a spacer of channel section 150 x 75 x 5 mm, 330 mm long complete as per clause 811 and as per direction of the Engineer - in - Charge.

Supplying & fixing of Hazard Markers of size : 30cm X 90 cm as per IRC :79-1981 ( The above is inclusive of vertical post) and as per direction of the Engineer - in - Charge.

Retro-Reflectorised Traffic Signs:-Providing & fixing of retro reflectorised cautionary, mandatory and informatory sign as per IRC: 67 made of high intensity grade sheeting vide clause 801.3 fixed over aluminium sheeting 1.5mm thick, when signs with maximum side dimensions do not exceed 600mm, or with aluminium sheeting 2.0mm thick when signs with maximum side dimensions exceeds 600mm, supported on a mild steel angle iron post 75mmx75mmx6mm firmly fixed to the ground by means of properly designed foundation with M15 grade cement concrete 45cmx45cmx60cm, 60cm below ground level as per approved drawing (Reference to MoRT&H's specification 801) and as per direction of the Engineer - in - Charge.

60 cm equilateral triangle

80 cm x 60 cm rectangular

M. C. ENTERPRISE

CHATTERJEE CONSTRUCTION

M/s. Soma Construction