National High Speed Rail Corporation Limited Tender

Topographic Survey of utilities, Verification of specified points and Staking of Final Alignment i) Topographic survey of different utility services of Railway or other Central/State Govt authorities like OHE structure and installations,S&T structures and installations Open I Tube well, pump house, telephone I electric poles, high tension lines, trees etc. above ground, and wires I cables, pipelines (water, gas, petro etc.) underground, which need to be shifted before construction. Topographic survey of existing Govt/Private structures coming within proposed alignment and land boundary like buildings etc. complete. Assessment, valuation and submission of details of above utility services and existing Govt/Private structures. ii) Verification of Aerial Lidar output (at least 10 pts./km) by doing topographic survey. iii) Staking of centre line of final alignment with wooden pegs (50x50x450 mm size)(cost included) on ground @ 20m interval and other important locations such as curve points (ST,TC, CRN, CT, TS, Km, Half Km, & Ref Pillars), bridges, tunnels, road crossings etc as per final alignment design based on GPS co-ordinates, vertical and horizontal control points already established.

Extension of Horizontal & Vertical Control points by Utilizing DGPS Control points fixed along the route of horizontal and vertical Control Points at 1. every km (a set of 3-pillars, about 200 m apart) and at using DGPS by 3 atleast hours observation or 2. other Critical/important locations at using DGPS by atleast 12 hours as per Direction of Engineer-in-Charge • Processing of data for network adjustment so as to achieve an accuracy of 1:100,000 in horizontal and 12 √k in vertical. • Work will be carried out as per technical specification mentioned This will include preparation of list of coordinates of all the points in geographical, grid and around coordinate system and a location identifier showing sketches and photographs of these.

Erection of RCC Pillars(1:2:4.Cement : Coarse sand: Stone grit) encashed in PVC pipe of 150 mm dia and 1m Length with 300 mm projected above ground level at Control Points,Center line, Curves & other locations with contractor's material , tools and plants including all leads and lifts and crossing of tracks with or without iron plate of 75mmx75mmx6mm shall be fixed on top of pillar with anchor as per Direction of Manager-in-Charge • Other details shall be as per technical specification and drawing