Construction of RCC Retaining wall at downstream of concrete dam and at Switch Yard near Power Station at KHEP, Nabagram under CD, APWD., Diglipur Revised Estimate

Amount

Earth work in excavation by mechanical means (Hydraulic excavator) / manual means in foundation trenches or drains (not exceeding 1.5 m in width or 10 sqm on plan), including dressing of sides and ramming of bottoms, for all lift, including getting out the excavated soil and disposal of surplus excavated soil as directed, within a lead of 50 m.

All kinds of soil.

Extra rates for quantities of works, executed:

In or under water and/or liquid mud, including pumping out water as required

Filling available excavated earth (excluding rock) in trenches, plinth. sides of foundations etc. in layers not exceeding 20cm in depth, consolidating each deposited layer by ramming and watering, lead up to 50 m and for all lift

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level :

1:4:8 (1 Cement : 4 coarse sand (zone-Ill) derived from natural sources : 8 graded stone aggregate 40 mm nominal size derived from natural sources)

Centering and shuttering including strutting, propping etc. and removal of form work for:

Foundations, footings, bases for columns

Retaining walls, return walls, walls (any thickness) including attached pilasters, buttresses, plinth and string courses fillets, kerbs and steps etc.

Providing and laying in position specified grade of reinforced cement concrete, excluding the cost of centering, shuttering, finishing and reinforcement - All work up to plinth level :

1:1.5:3 (1 cement : 1.5 coarse sand (zone-III) derived from natural sources : 3 graded stone aggregate 20 mm nominal size de rived from natural sources)

Reinforced cement concrete work in walls (any thickness), including attached pilasters, buttresses, plinth and string courses, fllets, columns, pillars, piers, abutments, posts and struts etc. above plinth level up to floor five level, excluding cost of centering, shuttering, finishing and reinforcement:

1:1.5:3 (1 cement : 1.5 coarse sand(zone-III) derived from natural sources : 3 graded stone aggregate 20 mm nominal size derived from natural sources)

Steel reinforcement for R.C.C. work including straightening, cutting, bending, placing in position and binding all complete upto plinth level.

Thermo-Mechanically Treated bars of grade Fe-500D or more.

12 mm cement plaster of mix :

1:4 (1 cement: 4 fine sand)

Providing weep holes in brick masonry/ Plain/ reinforced concrete abutment , wingwall/ return wall with 80mm dia PVC pipe extending through the full width of the structure with slope of IV:20H towards draining forces complete as per drawing and technical specifications.

PVC pipe 80mm dia

Collection and filling of stone boulder as filter media

Stone aggregate 90mm to 45mm.

Providing and construction Gabion structur for erosion control, river training works and protection works with polymere wire crates of sizes each divided into 1.00 mtr compartments by cross netting with mesh opening size 150mm x 150mm made from 9mm polymere rope(PP) having weight of 40 grm/m with a tolerance of + or - 8% 1560 kg breaking strength(min) and after 1000 cycles of abration the rope shall be subjected to tensil test as per IS:7071 (Part-IV) -1986, which shall be more than 85% of the original breaking strength of the rope, the crates shall be filled with boulders with least dimension of 200mm, all loose ends to be securely tied with 9mm polymere wire as oer the specification of standard specification of gabions and as oer the direction of the Engineer-in-charge.

With polymere wire crates of mesh size 150mm x 150mm woven with 9mm dia. Polymere wire crates size of 3.00mm x1.00mm x 1.00mm

With polymere wire crates of mesh size 150mm x 150mm woven with 9mm dia. Polymere wire crates size of 2.00mm x1.00mm x 1.00mm

With polymere wire crates of mesh size 150mm x 150mm woven with 9mm dia. Polymere wire crates size of 1.00mm x1.00mm x 1.00mm

Providing and laying of multifilament wooven Geo textile confirming to wooven PP Geo textile(240 gm TFI-1300) on the back side of Gabion. The cost will include all the operations like supply and laying in place etc. as direction by E-I-C.

Providing and laying stone (size 22.5 mm thick) pitching on slopes laid over prepared surface, including boulder apron laid in cement mortar 1:6 fine sand) as per the direction of Engineer-in-charge.

Stone/ boulder

Carriage of quarry rubbish by mechanical transport for an average lead of 22.00 Km including loading, unloading & carriage by manual labour for an lead of 50 m & filling etc compete as per the direction of Engineer-in-charge.

PTR MATHI VANAM