Emergent Restoration of superstructure and foundation of Gairganda Bridge including protection work at Chainage 2.200 kmp of NH-317 near Birpara, in the district of Alipurduar, WB, year 2025-26- Ph-II.

Amount

Clearing grass and removal of rubbish up to a distance of 50 metres outside the periphery of the area. (Reference to MoRT&H's specification clause 201)

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.

Dismantling of existing structures like culverts, bridges, retaining walls and other structure comprising of masonry, cement concrete, wood work, steel work, including T&P and scaffolding wherever necessary, sorting the dismantled material, disposal of unserviceable material and stacking the serviceable material with all lifts and lead of 1000 metres. 4(i)II.B Prestressed / reinforced cement concrete grade M-20 & above

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 (Ref. to MORT&H's specification 1600)

Supplying preparing and placement of ready mix non shrink cementious micro- concrete having no metalic aggregate or chlorides for repairing and \ jackting of damaged R.C.C.members. Themicro concrete should achieve a compressive strength not less than 10 MPa after 24 hours. 40 Mpa after 7 days 3 and 50 Mpa after 28 days at 300C.It should have unrestrained expansion in between 1 to 4%. flexural strength shall not be less than 5 MPaafter 28 days. Micro concrete should have a co-efficient of thermal expansion similar to that of the host concrete.

Replacement of Expansion Joints complete as per drawings. a). Strip Seal Expansion Joint.Providing and laying of a strip seal expansion joint catering to maximum horizontal movement upto 80 mm manufactured by MORT&H ,GOI Approved / Empanelled manufacturer and complete as per approved drawings and standard specifications to be installed by the manufacturer/supplier or their authorised representative ensuring compliance to the manufacturer's instructions for installation (Reference to MORT&H's specification 2606).

Replacement of Bearings complete as per Technical Specification (Reference to MORT&H's specification 2810) (The work entails replacement of all the bearings on one side of the span.)

Supplying, fitting and fixing in position true to line and level Elastomeric bearing conforming to IRC: 83 (Part-II) Section IX and Clause 2005 of MoRT&H specis complete including all accessories as per drawing and Tech. specifications.

Uplifting of Superstructure span by jacking up from below by placing the jacks on pier / abutment caps for span weight as below: (ii) Span Wt. : Upto 360MT

Earth work in excavation of foundation of structures as per drawing and technical specification, including setting out, construction of shoring and bracing, removal of stumps and other deleterious matter, dressing of sides and bottom, backfilling the excavation earth to the extent required and utilising the remaining earth locally for road work (Reference to MoRT&H's specification clause 304).

Providing and construction of a gabian structure for retaining earth with segments of wire crates of size 7 m x 3 m x 0.6 m ( 7.50m x 3.0m x0.6m ) each divided into 1.5 m compartments by cross netting, made from 4 mm galvanised steel wire @ 32 kg per 10 sqm having minimum tensile strength of 300 Mpa ( tensile strength 300-450 Mpa ) conforming to IS:280 and galvanizing coating conforming to IS:4826, woven into mesh with double twist, mesh size not exceeding 100 x 100 mm, filled with boulders with least dimension of 200 mm, all loose ends to be tied with 4 mm galvanised steel wire (Reference to MORT&H's specification 2503.3).

Providing and laying of boulder apron laid in wire crates made with 4mm dia wire dia not less than 4mm GI wire conforming to IS: 280 & IS:4826 in 100mm x 100mm mesh Mesh size not more than 150mm (weaved diagonally) including 10 per cent extra for laps and joints laid with stone boulders weighing not less than 40 kg each ( Tensile strength 300-450mpa, size of wire crates 3.0mx1.50mx1.25 m) (Reference to MORT&H's specification 2503).

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). 1A. Boulder Laid Dry Without Wire Crates.

Plain/Reinforced cement concrete in open foundation complete all as per drawing and Technical Specifications (Reference to MORT&H's specifications 1500, 1700 & 2200). PCC Grade M15. Height up to 5m.

Providing and laying of hot applied thermoplastic compound 2.5 mm thick including reflectorising glass beads @ 250 gms per sqm area, thickness of 2.5mm is exclusive of surface applied glass beads as per IRC:35. The finished surface to be level, uniform and free from streaks and holes (Reference to MoRT&H's specification 803).

Supplying & fixing of Hazard Markers of size : 30cm X 90 cm as per IRC :79-1981 ( The above is inclusive of vertical post)

Supplying & fixing of Raised Pavement Markers/ Road Studs/Cats Eye made of polycarbonate moulded body and reflective panels with micro prismatic lens capable of providing total internal reflection of the light entering the lens face which shall support a load of 13635 kg tested in accord -ance to ASTM D 4280 Type H and compling to Specifications of Category A of MoR&TH Circular No. RW/NH/33023/10-97 - DO III Dt. 11.06.1997 & MoRT&H's specification for Road & Bridge Works (5th Rev.). Marker height shall not be less than 10 mm and shall not exceed 20 mm, width shall not exceed 130mm and with minimum reflective area of 13 sqcm on each side and slope to the base shall be 35 ± 5 degree. Fixing will be without nails but by using epoxy resin based adhesive as per manufacturer's recommendation including site clearence etc and complete as directed by the Engineer in Charge. The contractor will have to provide a test certificate from a reputable national/international laboratory comforming the above specifications.

Plain/Reinforced cement concrete in well foundation complete all including vibrating and compacting, finishing, curing, sampling, testing etc as per drawing and Technical Specifications (Reference to MORT&H's specifications 1200, 1500 & 1700) 11A(ii) RCC M25 Grade. Case I Using Concrete Mixer

Excavation for roadwork in soil with hydraulic excavator of 0.9 cum bucket capacity including cutting and loading in tippers, trimming bottom and side slopes, in accordance with requirements of lines, grades and cross sections, and transporting to the embankment location within all lifts and lead upto 1000m (Reference to MoRT&H's specification clause 301)

Painting two coats, after filling the surface & applying a sealing primer, with synthetic enamel paint in all shades on new plastered concrete surfaces as per MORT7H's specification 803.6.2. (Reference to MORT&H's specification 803).

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).

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).

NANTU GHOSH (BID ID -3257712)