ADDN/ALTN TO MOAT WALL ALONGWITH PROVN OF RETAINING WALL TOWARDS MOAT WALL AT SM-89 UNDER GE(FW) KOLKATA.

NOTES :The bidders/contractors are advised to read tender document & all corrigendum/ amendments and General conditions of contracts before entry/quoting the rates.

Material & Labour for Excavating over areas, n exc 1.5 m deep and getting out depth and getting out soft/loose soil complete all as specified and as directed.

Material & Labour for Excavating over areas, exc 1.5 m deep and getting out complete all as specified and directed

Material & Labour for Moorum/red bajri filling in floors or pavings, laid in layers n exc. 15 cm thick, spread, levelled and rammed including watering as specified and as directed.

Material & Labour for Reinforced cement concrete M-25 (Design mix) of 20 mm aggregate as in Walls, retaining walls, basement walls, ballast walls and the like; any thickness; above top of footings; including attached pilasters and buttresses complete all as specified and as directed.

Material & Labour for Reinforced cement concrete M-25 (Design mix) of 20 mm aggregate as in foundations, including rafts, footings, foundation beams; plinth beams; bases for columns, etc.; basement slabs, under-reamed piles and mass concrete complete all as specified and as directed.

Material & Labour for Thermo-Mechanically Treated(TMT) bars of grade Fe-500D (IS-1786) Steel reinforcement 6 to 8 mm dia cut to length, bent to shape required, including cranking, bending spirally for hooping for columns, hooking ends and binding with and including mild steel wire (annealed) not less than 0.9mm dia or securing with clips complete all as specified and as directed.

Material & Labour for Thermo-Mechanically Treated(TMT) bars of grade Fe-500D (IS-1786) Steel reinforcement 10mm dia and over, cut to length, bent to shape required, including cranking, bending spirally for hooping for columns, hooking ends and binding with and including mild steel wire (annealed) not less than 0.9mm dia or securing with clips complete all as specified and as directed.

Material & Labour for Formwork for flat/curved roughly finished surfaces to sides of concrete foundations, footings, bases of columns, sides and soffits (if any) of foundation and plinth beams; and similar work; vertical or to batter etc. as complete all as specified and as directed.

Material & Labour for Formwork for flat /curved roughly finished surfaces to faces of walls, retaining walls, abutments, parapets and staircase railings and similar work including attached pillasters, buttresses, etc; vertical or to batter complete all as specified and as directed.

Supply and fixing of 75 mm bore PVC (SWR) pipes single socketed, in any length, laid in retaining wall for weep hole complete all as specified and as directed.

Material & Labour for wire netting of stainless steel wire 1.4mm dia (size of mesh is 25mm)fixed with tinned tacks of stainless steel wire staples around Pipes or another surfaces complete all as specified and as directed.

Material & Labour for providing 100 mm thick bed of plain cement concrete of type M-7.5 (nominal Mixed) with 40 mm aggregate for laying of tiles on screed bed complete all as specified and as directed.

Material & Labour for Bricks, sub class B, having thicknesss 75 mm including mortar (laid flat, in floors, old size bricks bedded and jointed in cement mortar 1:3 and pointed in cement mortar 1:3 complete all as specified and as directed.

Material & Labour for returning, filling in Soft/loose soil, including spreading, levelling, watering and well ramming in layers not exc 25 cm. complete all as specified and as directed.

Material & Labour for arrange drill and bore the perforated PVC pipe 2inch dia. 15mt. 10mt. & 5mt. depth, boring by compressor system and push the cement slurry blend with water mixed with NSPG compound, silica flour aggregate & sodium silicate by mechanical pressure pump, one shot a 500 mm area and 7 times, every shot and solidify of materials consecutive time gap will be 10-15 minutes complete all as specified and as directed. Note:- Cementitious material/grout shall be measured and paid under relevant item.

Suppy only Cementitious material/grout filled in proportion recommended by the registered applicator in each hole as required complete all as specified and as directed.

Material & Labour for shotcrete of existing surface with polymer modified mortar with the use Sand, Cement and liquid polymer (1:4 ce/sa& 5% liquid polymer by weight of cement) and completed as under:- (a) Surface preparation before shotcrete . Surface should be cleaned by removing damaged portion of the retaining wall; clear all loose the substances up to a solid surface is exposed. (b) All undulations should be repaired with proper polymer modified mortar with the use Sand, Cement and liquid polymer (1:4 ce/sa& 5% liquid polymer by weight of cement) (c) The surface where brick structure came opened should be replaced with alternative brick support and repaired with polymer modified mortar. (d) Next, cover the surface with appropriate chicken mesh {chicken poultry wire IS 3150 (1982), hexagonal honeycomb structure} and fixed by proper nailing to bind the surface. (e) Chicken Wire mesh/ Expended metal shall be measured and paid separately.

Supply only Wire netting of stainless steel wire 1.4mm dia having 25mm size of mesh of required hole shape (Rectangular/trapiziodal/hexagonal) complete all as specified and as directed.

Material and labour for removing the peeled off portions of RCC retaining wall including chipping off and cleaning with wire brushes to remove all loose particles, laitance, weak or friable concrete and making good surface as under (a) First a polymeric bonding coat has to be coated shall be used mixed with cement to ensure such. (b) Shotcreting involves pneumatically spraying mortar or concrete through a hose pipe at a high velocity onto the prepared surface to build it up in layers up to 50 mm. Average thickness is achieves. (c) The hose pipe holds perpendicular to the surface, about 1-2 feet away and moves it in consistent circular motions to ensure even coverage. (d) M-25 grade concrete mix with liquid silicate accelerator shall be used to carry out such operations. .

Supply and fixing of framed work such as grills, gratings, etc.. with ends of bars shouldered and/or riveted, or forged into spikes; framed guard bars; barred iron doors; ladders; framed balusters; walk ways; railings; framework of water tanks and similar work conforming to Fe.290.Gde-E-165. all as specified