IndiaPosted at: Dec 7 2020 8:59PM

NHSRCL adopts aerial LiDAR survey technique for Delhi-Varanasi High Speed Rail Corridor

New Delhi, Dec 7 (UNI) The National High Speed Rail Corporation Ltd will adopt Light Detection and Ranging Survey (LiDAR) technique using Laser-enabled equipment mounted on a helicopter for conducting ground survey for the preparation of Detailed Project Report (DPR), for the proposed Delhi-Varanasi HSR corridor.
Keeping in mind the magnitude of the project and adhering to the timelines to submit the DPR of DVHSR corridor, the ground survey using aerial LiDAR technique has already started.
Reference points on the ground have already been marked and data collection through equipment mounted on a helicopter will commence from December 13, 2020 (depending on weather conditions) in a phased manner.
The requisite permissions from the Ministry of Defence for flying the helicopter have been received and the inspection of the aircraft and equipment are underway.
The proposed Delhi-Varanasi HSR alignment covers mixed terrains including densely populated urban and rural areas, highways, roads, ghats, rivers, green fields among others which makes this activity more challenging.
The survey technique was adopted for the first time for any railway project in India for the Mumbai-Ahmedabad High Speed Rail Corridor primarily because of its high accuracy. Using the ground survey using aerial LiDAR for MAHSR alignment, the work was done in just 12 weeks against the customary 10-12 months through traditional survey methods.
Alignment or ground survey is a crucial activity for any linear infrastructure project as the survey provides accurate details of areas around the alignment. This technique uses a combination of laser data, GPS data, flight parameters and actual photographs to give accurate survey data, an official release here said.
Based on the findings of the survey, designing of the vertical and horizontal alignment, structures, location of the stations and depots, land requirement for the corridor, identification of project affected plots/structures, and Right of Way are decided.
The NHSRCL has been entrusted with the work of preparing DPR for the Delhi-Varanasi HSR Corridor by the Ministry of Railways. The tentative length of the corridor is about 800 km, the alignment and stations will be decided in consultation with the government.
UNI SD RJ 2058

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NHSRCL adopts aerial LiDAR survey technique for Delhi-Varanasi High Speed Rail Corridor

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