CONSTRUCTION OF TUBE WELL- 1731461

Amount

Transportation of Rig along with allied accessories etc. complete including erection and levelling at site, through all kinds of roads, approaches, fields etc. in all leads and lifts up to site of work complete in all respects as per the direction of the Engineer-in-charge.

Earth work in foundation for digging tube well in all kinds of soil including dewatering soring, strutting from ground level to 5 mtrs. Including disposing of excavated soil in all lealds and lifts complete in all respect as per the direction of the Engineer-in-charge 0-5 mtrs.

Drilling of bore as per specification laid down in IS:2800-1991 part-I with upto date ammendments if any percussion Rig or combination drilling Rig starting with 950-600mm dia M.S. pipe reduced to 450-400mm dia MS Pipe conforming to IS-4270-2001 with upto date ammendments if any, in all kinds of soil, boulders rocks, collapsible strata, saturated soil, artisian condition including the cost of including the cost of consumable stores, fuel, lubricants and other accessories etc. complete in all respect as per the direction of the Engineer-in-charge.

Drilling and lowering of MS casing pipe conforming to IS-4270-2001 with uptodate ammendments if any of suitable sizes as mentioned above from 5-30 mtrs. below ground level within all leads and lifts. 5 to 30 mtrs

Drilling and lowering of MS casing pipe conforming to IS-4270-2001 with uptodate ammendments any of suitable sizes as mentioned above from 30-60 mtrs. below ground level within all leads and lifts. 30 to 60 mtrs.

Drilling and lowering of MS casing pipe conforming to IS-4270-2001 with upto date ammendments if any of suitable sizes as mentioned above from 60-125 mtrs. below ground level within all leads and lifts. 60 to 100 mtrs.

Drilling and lowering of MS casing pipe conforming to IS-4270-2001 with upto date ammendments if any of suitable sizes as mentioned above from 60-125 mtrs. below ground level within all leads and lifts.100 to 125 mtrs.

Collection preservation and display of suitable size sample box with top land locking arrangement till handing over of the Tube Well to the Department complete in all respect as per the direction of the Engineer-in-charge.

Supply and lowering IS marked electric resistance welded MS pipe 300mm dia meter nominal size housing 8mm thick having out side diameter 323.90mm screwed and socketed, conforming to IS specifications No. 4270-2001 with uptodate ammendments if any about 4 mtrs. to 7 mtrs.in length welded without any circumferential joints into bore hole in vertical position including cost of all scaffolding derricks,poles, lamps and embedded in foundation etc. including cost of all cutting, threading and welding of pipes etc. complete within all leads and lifts complete in all respect as per the direction of the Engineer-in-charge.

Supply and lowering at site Electrical resistance welded (ERW) stainless steel cage type V-wire wound screens of size 300mm, 8mm thick with slot opening 1.0mm as per IS-8110-2000 with uptodate ammendments if any and material specifications as per AISI(American Iron and Steel Inst.) type Grade SS-304 in suitable length as per site condition including the cost of SS socket 8mm thickness (supplied by the department) of length 140mm conforming to AISI grade 304 suitable to accommodate screen and ring including jointing screen with blind pipe complete in all respect all scaffolding darricks, poles, clamps, embedding in foundation etc. including cost of all cutting, threading and welding of pipes etc. within all leads and lifts complete in all respect as per the direction of the Engineer-in-charge. Screen will be of continuous trapezaoidal wire spirally wound around fabricated cage. The wrapping wire having a "V" shaped (Wedge) profile wire with flat surface on the outside and producing expanding slots on the inside of various dimesions, resistance welded to a cylindrical body made of number of longitudinal special high tensil supports rods to provides smooth unrestricted bore which are in turn welded into cylindrical ring coupling etc. complete within all leads and lifts complete in all respect as per the direction of the Engineer-in-charge.

Providing and fixing MS Taper / Reducer as per length approved by the Engineer-in-charge. The material of MS taper/reducer shall be equivalent to parent pipe materials and shall conform to Chemical compositions as per clause 5.2 and mechanical properties as per clause 6.1 and table-1 of IS 4270-2001 with upto date ammendments and complete in all respects as per the direction of the Engineer-in-charge.

Supply and lowering IS marked electric resistance welded MS pipe 300mm diametre nominal size housing 8 mm thick having out side diametre 323.90 mm screwed and socktted conforming to IS specification No.4270-2001 with upto date amendments , if any , in a random length of 4 mtrs to 7mtrs , welded without any circumferential joints into bore hole in vertical position including cost of all scaffolding, derricks, poles clamps and embedded in foundation etc including cost of all cutting, threading and welding of pipes etc with in all leads and lifts complete in all respect as per the direction of the Engineer-in-charge.

Supply and lowering at site Electrical resistance welded (ERW) stainless steel cage type V-wire wound screens of size 300mm, 8mm thick with slot opening 1.0mm as per IS-8110-2000 with upto date ammendments if any and material specifications as per AISI (American iron and steel Inst.) type Grade SS-304 in suitable length as per site conditions including the cost of SS socket 8mm thickness of length 140mm conforming to AISI grade 304 suitable to accommodate screen and ring including jointing screen with blind pipe complete in all respect including cost of all scaffolding,darricks, poles,clamps embedding in foundation etc including cost of all cutting , threading and welding of pipes etc within all leads and lifts complete in all respect as per the direction of the Engineer-in-charge. Screen will be of continuous trapezoidal wire spirally wound around fabricated cage.

Providing and fixing M.S. centralized guides at suitable spacing for each tube well as per IS-226-1991 with uptodate ammendments if any within all leads and lifts 1x4 Nos. complete in all respect as per direction of the Engineer-in-charge.

Supply, lowering and fixing in position IS marked mild steel bail plug of 200mm/300mm dia meters with "U" hooks as per ISI-2800-1991 with uptodate ammendments within all leads and lifts as per the direction of the Engineer-in-charge.

Providing and fixing in position welded iron cap with looking arrangement of approved design to prevant foreign matter from getting into bore hole as required within all leads and lifts complete in all respect as per the direction of the Engineer-in-charge.

Providing and packing of gravel consisting of hard quartz or other suitable material with an average specific gravity of not less than 2.5 not containing more than 2% by weight of thin flat or elangated pieces shall be of sub rounded to rounded grains with minimum angular features of size 2-3.35mm, shall be free from impurities such as shafe shale mica, falspar, clay , sand, dirt, loam beamatte and organic material as per IS-4097-1967 with upto ammendments if any around intake of tube well with minimum thickness of shround around screen generally 100mm to the entire depth of the bore as per IS 2800(Part-I) 1991 with upto date ammendments if any, within all leads and lifts complete in all respect as per direction of the Engineer-in-charge.

Extraction of all sizes blind/casing pipes with machine starting from the bottom of the bore hole with in all leads and lifts complete in all respect as per the direction of the Engineer-in-charge.

In contact with soil.

Frely hanging

Development of tube well by back washing method, with air compressor of minimum 750CFM capacity pumping pipe of 200mm size and air line of minimum 65mm size or with other suitable method, till the well in thgroughly delveoped as per clause 4.2 of IS-11189-1985, with uptodate ammendments if any, complete in all respect as per the direction of the Engineer-in-charge.

Development of tube well by continuous over pumping method with VT pump/submersible pumps of suitable capacity not less than double the discharge established by the compressor method/design discharge, until the well is sand free as per IS-11189-1985 with uptodate ammendments, if any, complete in all respect as per direction of the Engineer-in-charge. The draw down and discharge to be established by running the VT/submersible pump continuously for 8 hours in the presence of officer not less than the rank of Assistant Engineer.

Testing the vertically of the tube well as per clause 4.3 of IS-2800( Part-II) 1979 with uptodate ammendments, if any,using plumb or plunger 6mm smaller in dia within the inside diameter of the well casing. The results of the vertically test shall be recorded on proforma shown in appendix A of IS 2800 (Part-II) 1979 with uptodate amamendments, if any, as appended with the tender documents and handed ovoer complete in all respect as per the direction of the Engineer-in-charge.

Dismentalling of the drilling Rig alongwith all other equipment after completion of job within all leads and lifts complete in all respect as per the direction of the Engineer-in-charge.

Construction of barbed wire enclosure of minimum of size 2.5x2.5 mm to safe guard the bore of tube well with angle iron of size 40x40x6mm 1.5 mtr in height embedded in concrete block of 30x30x30cm in all leads and lifts complelte in all respect as per the direction of the Engineer-in-charge.

H.N.SINGH AND COMPANY

SUKHDEV ENGINEERING WORKS