Mining, Minerals & Quarrying Tender Results

8.3.1 a) Drilling with drill bit in overburden portion of soil formation including collection of soil sample at every 3.0 m depth wherever there is a change of strata in sample boxes with distinguishing marks upto the depth of rock formation and withdrawing the drill bit for lowering casing as directed with 245mm to 300 mmm dia drill bit

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

Providing and constructing cast in situ hydraulic bored piles of specified diameter in M30 grade concrete using blended cement - slag cement with minimum cement content of 400kg/m³ in accordance with the structural engineers drawings and directions, but excluding 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 without 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 at least 1 pile in group and at least 25% of piles, comparing with refusal strata as identified 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). Pile 24'' Dia

10000556 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 rigs or combination drilling rigs (1200cfm/300psi) as required to suit the site condition as per the direction of Engineer-in-charge including use of own rigs with its accessories,tools and plant and consumables etc for lowering of 200mm dia PVC pipes for housing fitted with socket and with or without well screen as per tenecessity for soft,medium,hard and boulder formation (PVC casing pipes if required to prevent collapse of overburden is to be provided by the contractor including lowering and with drawing after completion of the tube well).(Icluding both LABOUR FOR DRILLING 200MM DIA UPTO 30 MTR. & LABOUR FOR DRILLING 150MM DIA FROM 30 MTR TO 150 MTR including all.) CONSIDER FOR 150 MTR DEPTH. Ground Floor

10000556 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 rigs or combination drilling rigs (1200cfm/300psi) as required to suit the site condition as per the direction of Engineer-in-charge including use of own rigs with its accessories,tools and plant and consumables etc for lowering of 200mm dia PVC pipes for housing fitted with socket and with or without well screen as per tenecessity for soft,medium,hard and boulder formation (PVC casing pipes if required to prevent collapse of overburden is to be provided by the contractor including lowering and with drawing after completion of the tube well).(Icluding both LABOUR FOR DRILLING 200MM DIA UPTO 30 MTR. & LABOUR FOR DRILLING 150MM DIA FROM 30 MTR TO 150 MTR including all.) CONSIDER FOR 150 MTR DEPTH. Ground Floor

Providing and constructing cast-in-situ hydraulic bored piles of specified diameter in accordance with the Structural Engineer’s drawings and directions, but excluding reinforcement and concrete, including cost of mobilization of all necessary plants and equipment such as piling rigs, temporary casing of appropriate length for setting out cardinal points and removal of the same, boring in overburden through all strata up to the required foundation level of piles using bentonite mud circulation technique or any other approved method, complete as approved by the Departmental Engineer. The item includes dewatering, disposal of bored material outside the site, careful chipping and cutting off excess pile portion as required without damage to the piles, dressing the pile top, and removing all debris from the site, including cost of all tools, plants, conveyance, labour, lead and lift, etc., complete as directed. Conducting Standard Penetration Test (SPT) to identify the refusal strata for at least one pile per group and for at least 25% of the total piles, comparing the same with refusal strata identified in the soil investigation report, and providing socketing into refusal strata by 1.00 m or into hard rock by 100% of pile diameter. (Length of pile for payment shall be measured up to the bottom of the pile cap). Pile 24'' Dia