Chennai Petroleum Corporation Limited Tender

Construction (Boring, Providing & Installing) of BORED CAST-IN-SITU R.C.C. STRAIGHT SHAFTED PILES of 500 mm DIAMETER and specified length below the pile cap with M35 grade concrete, using Ordinary Portland Cement (OPC) 53 grade conforming to IS: 12269 (latest Rev.) of approved make with a minimum cement content of 400kg/Cu.m. and stone chips of 20mm and down size, through all types of strata to carry a safe working load not less than specified including confirming that pile rests on hard strata having Nvalue greater than or equal to 100,excluding the cost of steel reinforcement but including the cost of boring with Hydraulic/Tractor mounted Rotary Drilling rigs using direct/reverse mud circulation method, hydraulic operated grab, maintaning borehole sides in position by bentonite slurry by direct mud circulation method, tremie concreting and temporary casing of appropriate length for setting out and removal of same and the length of the pile to be embedded in the pile cap etc. This also includes supply of necessary material including admixtures, plastisizers if required(quantity as per mix design report recommendation) & carrying out any ancillary work adjunct to piling work, disposal of surplus materials including earth, muck outside the refinery premises upto a lead of 7km in Vaikkadu Area with all leads and lifts, shifting plant and equipments from one pile location to another, mobilising & demobilising of required number of piling/boring rigs & ancillary equipments, tools, tackles & labour all complete, as per specifications, drawings & directions of Engineer-in-charge etc.Note: 1) Payment length shall be measured below the cut off level.Maximum cut off level will be 600mm from the EGL.No payment shall be made for the empty boring made above cut off level .2)Minimum 3 Nos.of piling rigs to be mobilised.

Empty Boring for 500mm dia. vertical piles,measured below the cut-off level till the distance,where boring had to be terminated due to occurrence of existing piles/stone columns at the proposed pile location.This includes the cost of boring with rotary/percussion type drilling rigs using direct/reverse mud circulation method, hydraulic operated grab, maintaining borehole sides in position by bentonite slurry by direct mud circulation method, and temporary casing of appropriate length for setting out etc. including refilling the bore upto the existing ground level with available excavated earth.This also includes carrying out any ancillary work adjunct to boring work, disposal of surplus materials including earth, muck generated upto a lead of 7km outside the refinery premises with all leads and lifts, mobilising & demobilising of piling/boring rig & ancillary equipments, tools, tackles & labour all complete, as per directions of Engineer-in-charge etc.

Supplying and placing in position HIGH STRENGTH DEFORMED STEEL BARS REINFORCEMENT (conforming to IS:1786, Grade Fe500), for 500mm dia RCC bored cast-in-situ piles for full length of pile, with helical ties, including transporting the Steel, straightening, cleaning, decoiling, cutting, bending to required shapes and lengths as per details, binding it in position by 16 SWG black soft annealed binding wire, at every intersection, supplying and placing with proper cover blocks, supports, chairs, overlaps, spacers, inner rings welding to main longitudinal rods to form a rigid cage for all heights and depths, guide bar etc. complete as per the specifications and directions of Engineer-in-Charge.