Construction of water recharge structure in indra colony behror

Construction of bore hole for shallow depth tube well from ground level to required depth for following size for all type of relevant strata by percussion/rotary drilling/ hand boring method excluding cost of casing pipe. The bore hole should be as per nominal bore of PVC casing pipe. The work will be complete after obtaining sand free water. 250 mm dia nominal bore

Earth work in execavation including loading unloading,disposaland dressing of execavated earth within initial lead of 50M and lift upto1.5m in dry or moist including dressing of execavated area with cost of dewatering wherever required and all applicable taxes and levies etc.complete in all respect. Soft & Loose soil

Providing and laying in position cement concrete of specified grade excluding the cost of centring and shuttering - All work upto plinth level :1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size)

Providing and placing of new graded gravel as (i) Size of Gravel vary from 50 mm at the bottom to 2. to 5 mm at the top as detailed: (a) Passing 80 mm screen but held on 10 mm- 150 mm layer (b) Passing 25 mm screen but held on 10 mm- 50 mm layer (c) Passing 10 mm screen but held on 5 mm- 50 mm layer Passing (d) 5 mm screen but held on 2 mm- 50 mm layer (ii) The filter gravel shall be as spherical as possible, hard, clean and uniform in quality and also shall not contain such impurities as dirt and clay as per IS: 8419 (Part-I) for filter gravel specifications. The work also includes washing the gravel with required concentration of HCL acid and finally with water and placing the same in filter beds as per direction of Engineer- In- Charge and technical specification complete in all respect.The gravel shall not contain more than 5% acid soluble matter as determined by solubility test in Appendix B of IS: 8419 (Part-I) amended up to date. (For RGF)

Supply & fixing Pre cast RCC ring at mouth of recharge shaft of M20 mix with 40 mm thickness 900mm dia

Supply &Fixing of air pipe of dia. 75 mm

S/F of strainer pipes made of ERW MS black pipe ISI mark of 200 mm dia nominal bore size at the site of work including required size of slottings as per IS : 81110- 1985

Brick work with FPS bricks of class designation 75 in foundation and plinth in:Cement mortar 1:6 (1 cement : 6 coarse sand)

Cement plastering including T&P, scaffolding, material and complete labour, including cost of water, curing, racking of joints etc. with 12 mm cement plaster of mix : including Providing /mixing of synthetic fibers compulsorily complying with IS 16481:2022 of 06 mm/12 mm length to be mixed @ 0.25% by weight of Cement i.e. 125 gms per 50 kg Cement up to 900 gms per cum of Concrete/ mortar1:6 (1 cement : 6 fine/ coarse sand)