Mining, Minerals & Quarrying Tender Results

same as item no. 103 above but applying single-component polyurethane waterproof coating on accessible roofs and terraces in the following sequence:- (i) Cleaning the surface thoroughly to remove all dirt, dust, grease, and loose particles, ensuring a sound, dry, and smooth base. (ii) Applying one coat of single-component polyurethane primer compatible with the waterproofing membrane, as per manufacturer’s instructions. (iii) Applying two coats of polyurethane liquid waterproofing membrane at specified intervals and to the manufacturer’s recommended dry film thickness, ensuring uniform and pinhole-free coverage. (iv) Supplying and laying a layer of 200 GSM non-woven geotextile fabric or 250 micron HDPE separation sheet (as directed by Engineer-in-Charge) over the treated waterproof surface for protection with necessary overlaps. (v) Supplying and laying 10 mm thick ceramic roof tiles of approved shade and make, laid over and including 10 mm thick screed bed in polymer-modified cement mortar (1:4). Tiles shall be fixed with spacers to maintain uniform joints of 3–5 mm; after proper setting, spacers shall be removed and joints filled with epoxy grout, finished flush and neat. Note for Item No 104 :- Minimum Dry Film Thickness (DFT): (a) The total Dry Film Thickness (DFT) of the polyurethane waterproofing membrane (excluding primer coat) shall not be less than 1.2 mm after full curing, irrespective of surface type (accessible or inaccessible roofs, terraces, or parapets). (b) The system shall comprise one primer coat and two or more finish coats of approved single-component polyurethane or fibre-reinforced polyurethane coating, applied strictly as per manufacturer’s Technical Data Sheet (TDS). (c) Where the manufacturer’s TDS specifies a higher DFT, the higher value shall prevail. (d) Wet Film Thickness (WFT) shall be measured during application using a wet film gauge, and cumulative WFT readings shall be recorded to ensure the achieved DFT meets or exceeds the specified minimum. (e) The finished surface shall be continuous, pinhole-free, and of uniform thickness. (f) Acceptance tolerance for DFT shall be ±10% of the specified minimum. (g) No protective or overburden layers (such as tiles or screed) shall be applied until the coating has fully cured and successfully passed ponding / adhesion tests to the satisfaction of the Engineer-in-Charge.

Labour for drilling a perfectly vertical bore hole of specified dia for a specified depth below ground level through consolidated and unconsolidated rock with down the hole hammer drilling rig or combination rig as required to suit the site condition as per the direction of the Engineer in charge including use of own rig with its accessories, tools and plant and consumables etc for lowering of 200mm/150mm dia G.I/P.V.C/M.S casing pipes for housing fitted with socket and with or without well screen as per the necessity for soft, medium, hard and boulder formation (G.I/ P.V.C/ M.S casing pipes if required to prevent collapse of overburden is to be provided by the contractor including lowering and withdrawing after completion of the tube well), 200mm dia to 400mm dia in overburden portion including packing of gravel supplied by the contractor for 400mm dia bore only

Labour for drilling a perfectly vertical bore hole of specified dia for a specified depth below ground level through consolidated and unconsolidated rock with down the hole hammer drilling rig or combination rig as required to suit the site condition as per the direction of the Engineer in charge including use of own rig with its accessories, tools and plant and consumables etc for lowering of 200mm/150mm dia G.I/P.V.C/M.S casing pipes for housing fitted with socket and with or without well screen as per the necessity for soft, medium, hard and boulder formation (G.I/ P.V.C/ M.S casing pipes if required to prevent collapse of overburden is to be provided by the contractor including lowering and withdrawing after completion of the tube well), 200mm dia to 400mm dia in overburden portion including packing of gravel supplied by the contractor for 400mm dia bore only

Construction of 1 nos production wells including scientific source finding through consolidated and unconsolidated rock with down the hamer drilling rig or combination rig with pvc pipe and installation of submersible pump set with all acessories Labour for drilling a perfectly vertical bore hole of specified dia for a specified depth below ground level through consolidated and unconsolidated rock with down the hole hammer drilling rig or combination rig as required to suit the site condition as per the direction of the engineer in charge including use of own rig with its accessories ,tools and plant and consumables etc for lowering of 200mm/150mm dia G.I.P.V C/M.S casing pipes for housing fitted with socket and with or without well screen as for the necessity for soft ,medium,hard and boulder formation( G.I/P.V.C/M.S casing pipes if required to prevent collapse of overburden is to be provided by the contractor including lowering and withdrawing after completion of the tube well) 200mm dia to 400mm dia in overburden portion including packing of gravel supplied by the contractor for 400mm dia bore only. 0mtr to 90mtr

Providing and constructing cast in situ hydraulic bored piles of 450mm diameter in M30 grade concrete using blended cement - slag cement with minimum cement content of 400kg/m³in accordance with the structural engineers drawings and directions, but exculding reinforcement including cost of mobalization of all necessary plants, equipment's like piling rigs, temporary casing of appropriate length for setting out cardinal points and the removal of the same, boring in overburden, using bentonite mud circulation technique or any other method duly through all strata upto the foundation level of piles etc., complete all as approved by the departmental engineer.Further include dewatering, placing concrete by tremie pipe method, disposal of bored material outside the site. Including Chipping carefully cut off portion of piles as required without any damage to the piles and dressing the top and removing all the debris away from the site with out any extra cost as directed including the cost of all tools, plants, conveyance, all labour, lead and lift required etc., Conducting standard penetration test to identify the refusal strata for atleast 1 pile in group and atleast 25% of piles, comparing with refusal strata as indentified in soil report and providing socketting into refusal strata by 1.00mt or into hard rock by 100% dia of the pile. (Length of pile for payment shall be measured up to bottom of pile cap).