NIT 08 (2022-23) Item No. 05

Hydraulic Excavator (3D) with driver and fuel. (DSR’21 0020)

Hire and running charges of Long boom crane 20 tonne capacity. (DSR’21 0028)

Generator 100 KVA/125 KVA for lighting etc. as required at site. (DSR’21 0070)

Supply of 900 mm dia. MS pipe having length of 6.00 Mtrs. made out of 10 mm thick MS Sheet. (DJB AR)

Supply of 01 No. 1115 mm dia.(OD) & 915 mm dia.(ID) Flat Face/SW Flange made out of 35 mm thick MS Sheet. (DJB AR)

Pumping out water caused by springs, tidal or river seepage, broken water mains or drains and the like. (DSR’21 14.23)

Welding by gas or electric plant including transportation of plant at site etc. complete. (DSR’21 10.22)

Excavating the site & breaking the walls of the existing sluice valve chamber using JCB. After that dewatering will be started using submersible dewatering pumps to dewatered the clogged water inside the chamber & to create proper working conditions. Also existing sluice valve will be closed to stop the water coming from the UGR. After having shutdown of the 1500/1100 mm dia. South Delhi Main dewatering will be stated by cutting the window in the pipe & inserting the dewatering pumps inside the line. After controlling the dewatered water existing 900 mm dia. pipe will be cut from one side using gas cutter & on the other side i.e. sluice valve side nut bolts of the flange of the sluice valve & pipe line will be loosened & line will be removed. After that fixing of the new 900 mm dia. flange will be done with 6 mtrs. long 900 mm dia. MS gap piece using welding & the total arrangement will be lifted & down in the existing line to fit it with the existing line. After that one side of the gap piece will be fitted by tightening the nut bolts between the flange of the sluice valve & flange of the MS gap piece. Other side of the gap piece will be welded by using collar joint between the existing line & gap piece. After completing welding of the line sluice valve will be opened & checking of the line will be done by starting the 1500/1100 mm dia. South Delhi Main. After confirming successful repairing line will be made operational. Throughout the whole process of repairing dewatering will be done to maintain proper working conditions. (Justified Rate)

Making of Chamber: - Brick work with common burnt clay F.P.S. (non-modular) bricks of class designation 7.5 in foundation and plinth in: DSR’21 6.1 Cement mortar 1:6 (1 cement: 6 coarse sand). DSR’21 6.1.2

12 mm cement plaster of mix: DSR'21 13.1 1:6 (1 cement: 6 fine sand) DSR'21 13.1.12

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level: DSR'21 4.1 1:4:8 (1 Cement : 4 coarse sand (zone-III) derived from natural sources : 8 graded stone aggregate 40 mm nominal size derived from natural sources) DSR'21 4.1.8

DEVANAND MAHTO