openwell at thenpakkam Eri in acktp

Conducting Geophysical Survey, quantity and quality test and transportation charges etc., complete

Earth work for openwell excavation complying with relevant clauses of TNDSS. Well sinking with lead upto 10 m. in hard stiff clay, stiff black cotton, hard red earth, shales, murram, gravel, stoney earth and earth mixed with small size boulders and hard gravelly soil.First depth of 2m (0-2m).

Earth work for openwell excavation complying with relevant clauses of TNDSS. Well sinking with lead upto 10 m. in soft disintegrated rock, laterite, soft rock or kunkar not requiring blasting.Second depth of 2m (2m-4m).

Earth work for openwell excavation complying with relevant clauses of TNDSS. Well sinking with lead upto 10 m. in medium rock and dense medium rock not requiring blasting.Third depth of 2m (4m-6m).

Earth work for openwell excavation complying with relevant clauses of TNDSS. Well sinking with lead upto 10 m. in medium rock and dense medium rock requiring blasting.Third depth of 2m (4m-6m).

Fourth depth of 2m (6m-8m).

Fifth depth of 2m (8m-10m).

Earth work for openwell excavation complying with relevant clauses of TNDSS. Well sinking with lead upto 10 m. in hard granite measured in solid including blasting and stacking.Sixth depth of 2m (10m-12m).

Plain Cement concrete 1:5:10 (One cement, five sand and ten course aggregate of 40 mm size hard blue granite broken stone) for levelling course including cost of mixing, placing the concrete, consolidating and curing etc. complete as directed by the Officers.

Providing and laying in position, standardised concrete Mix M-20 Grade by insitu machine mix concrete adopting weighing batch method in accordance with IS 456 using 20mm and down graded hard broken granite stone jelly for all RCC items of works with minimum cement content of 325 kg/m3 and maximum water cement ratio of 0.55, including admixture (plasticiser / super plasticiser) in recommended proportions as per IS:9103 to accelerate, retard setting of concrete, improve workability without inspiring strength and durability with about (5 Cu.m) 7730 kg. of 20mm machine crushed stone jelly and with about (3.3 Cu.m) 5156 kg. of 10-12mm machine crushed stone jelly and with about (4.79 cu.m) 7670 kg. of crushed stone sand, but excluding cost ofreinforcement grill and fabricating charges, centering and shuttering and also including laying,vibrating with mechanical vibrators, finishing, curing, etc. and providing fixtures like fan clamps in the RCC floor/ roof slabs wherever necessary without claiming extra, etc.,complete complying with standard specification and as directed by the departmental officers. The coarse and fine aggregates to be used should comply with the requirements of IS standards. (No separate payment will be made by the Department for the excess usage of materials).