CA NO CWE/CHM(U)-83/2021-22 COMPLETION OF INCOMPLETE/ BALANCE WORK FOR PROVN OF RAIN WATER HARVESTING (B/R AND E/M WORKS) FOR FD REGT, ENGR REGT AND CMDC AT MIL STN CHANDIMANDIR UNDER GE (U) CHANDIMANDIR

Amount

Excavation over areas in hard /dense soils n. exc. 1.5m deep and getting out complete all as specified and directed.

Excavation over areas in hard/dense soils exc. 1.5m deep but n. exc 3.00m deep and getting out complete all as specified and directed.

Plain cement concrete 1:4:8 type D-2 using 40mm graded stone aggregate as in foundations, filling and mass concrete compete all as specified and directed.

Brick work with sub class 'B' bricks class designation 100 old size straight or curved on plan exceeding 6.00 mtr mean redius built in cement mortar 1:4 complete all as specifed and directed.

Plain cement concrete (1:2:4) type B-I using 20mm graded stone aggregae as in parapets and railing up to 60cm in height, coping, kneelers, apex stones, bed plates, bed blocks and the like including weathering, slight rounded or chamfered angle and throating with and incl necessary formwork complete all as specified and directed.

M&L 10 mm thick plastering in cm 1:4 on fair faces of brick walls and finish even and fair without using extra cement complete all as specified and directed.

M&L 15 mm thick plastering in cm 1:4 on fair faces of brick walls and finish even and fair without using extra cement complete all as specified and directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25cm thick each, excavated soil in trenches etc complete all as specified and directed. Note :-for payment purposes, volume of returning, filling after 10% decuction

Removing excavated spoil to a disatance not exceeding 50m and deposting where directed at a level not exceding 1.50 m above the starting point complete all as specifed and directed.

Excavation in trenches in hard/dense soil n. exc 1.5m wide and n. exc 1.5m deep for foundations and not exc 10sqm on plan and n.exc 1.50 mtr in depth for cesspit, manholes etc and getting out complete all as specified and directed.

Precast reinforced cement concrete M-25 (Design Mix) as in cover slabs for manholes etc. including use and waste of necessary formwork, set in CM 1:4 ,complete all as specified and directed.

S&F 160 mm bore (SWR) pipes single socketed, in any length with rubber ring joints, laid in trenches or in floors complete all as specified and directed. Note :- Excavation, earth work and PCC bed and haunching shall be measured and paid separately.

M&L for PCC (1:3:6) type C-2 (using 40mm graded stone aggregated) as in concrete bed to 160mm dia pipe in and packing under , and haunching against the sides of pipe after they are laid and tested complete all as specified and directed.

Precast reinforced cement Concrete M-25 (Design Mix) using 20 mm graded stone aggregates as in slabs supported on walls complete all a specified and directed. Note:- Formwork and reinforcement shall be measured and paid for separately.

Form work to soffit of suspended slabs such as roof slab, floor slabs and similar work not exceeding 20cm thick to achieve fair finishes on flat surfaces of concrete complete all as specified and directed.

Form work to edges of concrete flats such as roof slabs and similar work width exc 10cm but n exc 20cm to achieve fair finishes on flat surfaces of concrete, complete all as specified and directed.

Mild steel TMT bars 6 to 8 mm dia and over, cut to length, bent to shape required, including cranking, bending spirally for hooping for columns, hooking ends and binding with and incl. mild steel wire (annealed) not less than 0.90mm dia, complete, all as specifed and directed.

M&L PCC 1:2:4 type B-1 using 20mm graded stone aggregate as in surface channels and drains all as specified and directed.

Drilling of bore of size 150 mm dia upto 200 m depth by direct rotary mechanical system for injection well in any kind of soil strata including hard stone/boulders all as specified and directed.

Reaming of bore well from 150 mm dia to 300 mm dia hole up to 90 meter depth below the ground level in any kind of strata of soil/boulders/rocks etc all as specified and directed.

Supply assembling and lowering Rigid PVC blind casing pipe wall thickness not less than 7.5 mm heavy grade of size 150 mm dia socketed including fitting riveting jointing and lowering in bore hole confirming to IS-12818 : 2010 complete all as specified and directed.

Supply and fixing HPDE PVC pipe 150 mm bore single socket wall thickess not less than 7.5 mm in any length slotted with rubber joint and lowering in bore hole complete as per IS-12818 : 2010 all as specified.

Supplly and fixing PVC/MS bail plug assembly suitable for 150 mm dia bore PVC casing pipe complete all as specified and directed.

Supplly and fixing PVC/MS well cap 150mm bore suitable for 150 mm dia bore PVC casing pipe complete all as specified and directed.

M&L for pea gravel of size 3 mm to 4 mm packig all around the casing pipe to entire depth upto ground level complete all as directed and specified.

Devlopement of injection well bore with compressed air with diesel engine operated compressor for number of hours till free flow of water in well as ejected is obtained complete all as specified and directed.

Gravity flow filter unit of size 4.0 metre X 3.0 metre X 0.90 metre with supply and filling of filter media in the recharge Pit in the following manners:- (a) Bottom layer 30 cms thick of gravel of size 20 to 30 mm. (b) Middle layer 30 cms thick of gravel of size 5 to 10 mm. (c) Top layer 30 cms thick of coarse sand of 2 to 4 mm

M&L for MS cross of size 150mmX 150 mm with 150mm branches made out of MS pipe heavy grade having internal threads complete all as specified and directed.

Supply and fixing HPDE PVC pipe 100 mm bore single socket wall thickess not less than 7.5 mm in any length slotted and connect with 150 mm bore HDPE pipe by mean of rubber joint, Tee etc. as per IS -12818 : 2010 complete all as specified and directed.

Supply and fixing MS clamp, 1050mm long made out of MS flat of size 150mm wide 20 mm thick suitable for casing pipe of 150 mm dia in two halves with suitable nuts bolts and washers, including two coats of black bituminous paint over a coat of red oxide primer all as specified and directed.

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