Irrigation And Waterways Department Tender

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 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 . A. Cement Grout

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

Applying 2 coats of bonding agent with synthetic multi functional rubber emulsion having adhesive and water proofing properties by mixing with water in proportion (1 bonding agent : 4 water : 6 cement) as per Manufacturer's specification.

Applying epoxy mortar ( 10 mm nominal thick) over leached, honey combed and spalled concrete surface and exposed steel reinforcement complete as per Technical

Dismantling all types of plain cement concrete works, stacking serviceable materials at site and removing rubbish as directed within a lead of 75 m. In ground floor including roof. (a) upto 150 mm. thick

Cast-in-situ cement concrete blocks or lining units as per designed section and specification , in nominal mix proportion 1:1.5:3 (corresponding to M20 Grade) with well graded 20mm down stone metal aggregate, laid in position by casting in alternative panels or otherwise to keep a gap of 12mm between the adjucent units, over a layer of polythene sheet of thickness not less than 100µm to act as a separator between the bottom surface of the block and the sand cushion / filter material laid bellow the blocks, including dressing , ramming , shuttering, finishing, the exposed surface by trowel without adding any additional cement and sand mortar, curing and filling the gaps between the adjucent units by 5.6mm down coarse aggregate to be compacted properly, with all leads and lifts including supply and carriage of all materials, complete, without the cost of sand cushion / filter.(The rate is exclusive of the cost of stone aggregate and its carriage upto site. Construction wing has to add the cost of same from the SoR of PW (Roads) to derive the consolidated rate. Consumption chart of the USoR may be used for assessing the quantity of coarse aggregates per cum of concrete). With Stone aggregatesl (Pakur, North Bengal or Rajmahal varieties.)

Removal of defective concrete, cleaning the surface thoroughly, applying the shotcrete mixture mechanically with compressed air under pressure, comprising of cement, sand, coarse aggregates, water and quick setting compound in the porpotion as per clause 2807.1., sand and coarse aggregates conforming to IS: 383 and table 1 of IS: 9012 respectively, water cement ratio ranging from 0.35 to 0.50, density of gunite not less than 2000 kg/cum, strength not less than 25 MPa and workmanship conforming to clause 2807.6. (40 mm average thickness.)

Labour charges for providing filter with well graded 40 m.m. down stone metal /shingles and laying uniformly below pitching on bed, side slopes including preparing bed with earthwork up to 30 cm depth, where necessary and compacting as per direction of the Engineer- in - Charge and including all leads and lifts complete including the cost of supply and carriage of stone metals upto site.

Supply of stone / laterite boulders at site including cost of material, loading, unloading , carriage and stacking and including all incidental charges like Royalty,complete. (Royalty certificate in original from concerned authority are to be submitted along with the bill) a.Stone Boulder 30/45 Kg at work site.

Labour charge for dumping / laying of Laterite / Stone Boulders 20 kg & above / Shingles, from stack of worksite with all leads and lifts in water or spreading the same on the slope of the bank of River/Sea or the slope of the embankment or in the River/ Sea bed to an uniform thickness as per direction of the Engineer-in charge including cost of all accessories and other incidental charges. (a) Boulder 20 kg & above where boats are not necessary.

Labour charges for bouIder pitching on top and slope by placing required boulders (each weighing 20 Kg. and above within lead of 100 metres and all lifts) including filling the interstices with fragments as required, preparing sub-grade by cutting or filling the earth on slope upto 7.5 cm. depth, watering and ramming where necessary complete as per direction of the Engineer-in-charge. I. Stone/Boulder a) Over Jhama Khoa / metal filter/ Geo-textile filter.