Laying of new sewer line in seismology observatory at NGRI

Description of Items :

Filling available excavated earth (excluding rock) in trenches, plinth, sides of foundations etc. in layers exceeding 20cm in depth and if required to excavate the excavated soil, consolidating each deposited layer by ramming and watering, all lead up to site requirment and all lift.

Earth work in excavation by mechanical means (Hydraulic excavator)/manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth all lead in the campus as per instructions of Engineer-in-charge and lift upto 2.0 m, as directed by Engineer-in-charge. All kinds of soil

Constructing brick masonry manhole in cement mortar 1:4 ( 1cement : 4 coarse sand ) with R.C.C. top slab with 1:1.5:3 mix (1 cement : 1.5 coarse sand (zone-III) : 3 graded stone aggregate 20 mm nominal size), foundation concrete 1:4:8 mix (1 cement : 4 coarse sand (zone-III) : 8 graded stone aggregate 40 mm nominal size), inside plastering 12 mm thick with cement mortar 1:3 (1 cement : 3 coarse sand) finished with floating coat of neat cement and making channels in cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size) finished with a floating coat of neat cement complete as per standard design : Inside size 90x80 cm and 45 cm deep including C.I. cover with frame (light duty) 455x610 mm internal dimensions, total weight of cover and frame to be not less than 38 kg (weight of cover 23 kg and weight of frame 15 kg) : With common burnt clay F.P.S. (non modular) bricks of class designation 3.5

Excavating trenches of required width for pipes, cables, etc including excavation for sockets, and dressing of sides, ramming of bottoms, depth upto 1.5 m, including getting out the excavated soil, and then returning the soil as required, in layers not exceeding 20 cm in depth, including consolidating each deposited layer by ramming, watering, etc. and disposing of surplus excavated soil as directed, within a lead of 50 m : All kinds of soil - Pipes, cables etc. exceeding 80 mm dia. but not exceeding 300 mm dia

Providing and laying underground drainage PVC pushfit pipe of dia 150 mm with proper jointing make of Ashirvad or equivalent.

Providing and laying cement concrete 1:5:10 (1 cement : 5 coarse sand : 10 graded stone aggregate 40 mm nominal size) up to haunches of PVC pipes including bed concrete as per standard design : 150 mm diameter PVC pipe

Providing and fixing the PVC spetic tank of 1000 ltr capcity including all fittings and making the connection with manhole of approved qualilty. (Note-Horizontal, black PVC spectic tank)

S MADHUSUDHAN

GANGI SURENDER

R SRINIVAS