REPAIRS MAINT OF HT EM INSTALLATIONS, TRANSFROMERS , VCBS UG HT CABLES AND CONNECTED EXTERNAL ELECTRIFICATION WORKS AT OTA MH, DEFENCE COLONY AT PALLAVARAM AND AT DGQA UNDER GE STM CHENNAI

Earthwork excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5 m depth and getting out in any type of soil for laying cables / pipes / erection of poles etc., and levelling of bottom surface to required level complete all as specified and as directed. Note:- (i) Excavation shall be carried out manually at a location where directed by the Engineer-in-Charge to avoid breakage of existing Electrical / Water connections etc at site. Contractor shall quote his rate accordingly and nothing extra shall be admissible on this account.

Returning filling in soil including spreading, leveling, watering and well ramming in layers not exceeding 25 cm thick complete all as specified and as directed.

Removing excavated material (soil) to a distance not exceeding 50 metre and depositing where directed at a level not exceeding 1.5m above the starting point complete all as specified and as directed.

M&L for fine seived excavated dry soil laid to the required width of trench at bottom and top of cable as cushioning to cable complete all as specified and as directed. Note:- Thickness shall be measured after punning

M&L burnt bricks sub class 'B' old size laid in trenches ,width equal to length of bricks across the cable for cable protection complete all as specified and as directed.

M&L for drilling/ making bore hole under the road in any type of soil through trenchless technology by HDD (horizontal direction drilling method) including necessary machinery as required,perparing and settin up the plant and equipment , preparing new pipe/cable laying work like excavation shoring/ strutting etc drilling, stringing reaming pulling back the new work on the path alignment proper disposal of drilling fluid and the ground penetrating radar survey to protect existing utilities at the pipe/cable installation location restoration of site after completion all inclusive as per and STT IS No 2.3 2.2 2.2 second edition 2008 code of practice of trenchless technology suitting indian condition for making horizontal bore size of 200mm dia suitable for HDPE pipe insertion under the road crossing hard standing including HDPE pipe of size 200 mm nominal dia 28.30 mm minimum wall thickness of grade PE 80 for protection of MS pipe/cable to any depth complete all as specified and directed.