THE CONSTRUCTION OF DEEP PIEZOMETERS IN GROUND WATER DIVISION MADURAI

Amount

Drilling of 150 mm dia bore wells above the overburden soil in hard rock areas to the required depth as directed by the departmental officers including labour charges for inserting casing pipes assembly in the drilled holes, if necessary grouting the casing pipe etc., including transportation charges for the rigs and supporting vehicles from one place to another place (the casing pipe has to be supplied by the contractor at the rates noted in a separate item)

Supplying and erection of PVC Special Blue Pipes for Bore Wells suitable to 160 mm dia Bore well, best approved quality with ISI mark with necessary PVC coupling etc., complete complying with standard specifications.

Supplying and fixing of 110 mm dia 6 Kg/ cm2PVC inner pipes with Clamps suitable to 150 mm dia Bore well provided with slotted to the required depth as directed by the departmental officers etc., complete complying with standard specification.

Fabricating and Supplying the encasing cover with 3mm thick M.S. Pipe to protect PVC casing pipe for a depth of 1.50 m of which 0.75 m goes below the G.L. and 0.75 m stands above G.L. including the Red oxide paint.etc., complete complying with standard specification.

Earth work excavation for foundation and depositing on bank with initial lead of 10 m & initial lift of 2m in Sand, silt or other loose soil wet sand or silt not under water, light black cotton soil sandy loam and ordinary soil including excavated earth S.S. 20B to a required depth as directed by the departmental officers.

Supplying and erecting centering for sides and soffits of plain surfaces such as slab etc., using M.S. Sheets of size 90cm x 60cm BG 10 gauge stiffended etc., complete complying with standard specification.

Cement Concrete 1:3:6 (One Cement,three Sand, and six hard broken granite jelly) using 20mm hard broken granite jelly and M. sand to the work including curing and finishing etc., complete complying with the standard specifications.

Plastering with Cement mortar 1:5, 12 mm thick complete complying with standard specifications

Fabricating and supplying of Protection Box for observation bore well using 5 mm thick M.S. Steel Plates to the dimension of 650 mm * 400 mm. Height of box at rear side is 530 mm and 450 mm at front side. Top cover with projection to be provided with necessary hinges and pad lock arrangement to open and lock the box. Necessary arrangements to be provided at the bottom of the box to embed the box with concrete platform.The cost includes all materials, labour for welding, one coat red oxide primer, painting with two coats of approved enamel paint, Bolt, Nut, Lock and Key, writing the bore well details on the protection cover and transporting to the following bore well site as directed by the departmental officers.(As per Quotation.)

Supplying of M.S.Grill enclosure of size 1.50 x 1.50 x 1.80 inclusive of one M.S. Grill gate of size 0.75 x 1.50 m as per specifications. The M.S. Grill enclosure should have 5 Nos. of the vertical M.S. Angle of size 40 x 40 x 6 mm for the four corners and one at rear gate. The alround horizontal ties are with three numbers of 40 x 40 x 6 mm M.S. angle one at botton and one at middle and one at top, 16 x 16 x M.S. Square rod are to be provided in between the vertical angles at 15 cm c/c. The gate should be of 0.75 x 1.50 m size with 40 x 40 x6 mm M.S. angle at round and one horizontal at middle including 16 x 16 mm M.S. square rod for vertical at 15cm c/c with necessary aldrop for locking arrangements. The top of all square rods should be made of sharp. The entire should be made with bolt and nut arrangements has to attach each side separately and it can be firmly fixed at site. The cost includesall cost of materials required, labour charges for cutting threading, bolt and nuts, one coat red oxide with two coats of enamal paint, Writing Letters etc complete as directed by the departmental officers.

Provision for labour charges for pumping test by providing all machinery and accessories required and including cost of transportation charges and flushing the Borewell for 1 hour (As per Quotation)

N.AMBALAVANAN