At the least seven Indian corporations have proven curiosity for the development of the undersea tunnel for the formidable Mumbai-Ahmedabad Excessive Velocity Rail (MAHSR) hall throughout the pre-bidding stage, officers stated on Sunday.
A Nationwide Excessive Velocity Rail Company Restricted (NHSRCL) official informed IANS, “Seven Indian corporations had participated in pre bid assembly for setting up the undersea tunnel of the hall.”
The official stated that the tender for the development of the tunnel has been floated and bids are invited until February 19, 2021.
The bullet prepare undertaking can have a 21 km lengthy underground hall from BKC to Kalyan Shilphata within the state of Maharashtra.
The official stated that round 7 km of this underground hall is below the Thane creek. Of this, 1.eight km lengthy part might be developed below the ocean mattress, whereas the remaining a part of the stretch is to be constructed below the mangroves marshland on both aspect of the creek.
The official stated that tender is for the event of tunnel, which incorporates testing in addition to commissioning for double-line excessive velocity railway for the undertaking utilizing tunnel boring machine (TBM) and a brand new Austrian tunnelling methodology (NATM).
A geo-technical investigation of the undersea tunnel space was carried out earlier by a staff of engineers from NHSRCL, RITES and Japan’s Kawasaki Geological Engineering agency.
In an effort to examine the ocean mattress construction, a static refraction method (SRT) survey was carried out by the staff, which concerned firing a excessive vitality sound wave in direction of the seabed from under the water floor in addition to mapping the refracted sound wave with a view to decide the density of the rock below the ocean mattress. The staff had additionally submitted the ultimate report with the NHSRCL.
Final yr, the NHSRCL awarded civil contracts for the development of 64 per cent of MAHSR alignment which incorporates 5 HSR stations at Vapi, Billimora, Surat, Bharuch, Anand/Nadiad, prepare depot at Surat and one mountain tunnel of 350 metres.
The bullet trains are anticipated to run at 350 km per hour, masking the 508-km stretch in about two hours. Trains plying on the route take over seven hours and planes about an hour.
Prime Ministers Narendra Modi after which Japanese Prime Minister Shinzo Abe on September 14, 2017 laid the inspiration stone for the Rs 1.08 lakh crore ($17 billion) HSR undertaking.