The country’s first undersea tunnel is set to be built as part of the high-speed rail project.
The National High Speed Rail Corporation Ltd (NHSRCL) has launched a tender for the digging works of a 21 km long tunnel, including a 7 km undersea tunnel for the high speed rail corridor Mumbai-Ahmedabad.
The tunnel will be between Mumbai’s Bandra-Kurla complex metro station and Shilphata near Kalyan in Maharashtra.
“The 7km undersea tunnel at Thane Creek (intertidal zone) will be the first undersea tunnel to appear in the country,” NHSRCL said in a statement on Friday.
An underwater tunnel will be essential as this area is a protected sanctuary for flamingos and nearby mangroves. As a result, the railway tracks will be constructed under the sea through a tunnel to ensure there is no disturbance to the existing ecosystem, the NHSRCL website said.
Railway Minister Ashwini Vaishnaw also tweeted: “Tender has been issued for a 21 km long tunnel; includes India’s first underwater tunnel in Maharashtra for the #BulletTrain project.
The deadline for submitting offers is January 19, 2023.
According to NHSRCL, the tunnel will be approximately 25-65 meters deep from ground level and the deepest construction point will be 114 meters below Parsik Hill near Shilphata.
Tunnel Boring Machine and New Austrian Tunneling Method will be used to build the 21 km long tunnel.
“The tunnel will be a single-tube tunnel to accommodate two lanes for up and down lanes. Up to 39 equipment rooms at 37 sites will also be built next to the tunnel as part of the package,” he said.
Previously, NHCRCL issued a tender on July 22 for the design and construction of the Bandra Kurla complex underground high-speed station. The deadline for submitting offers is October 2022.
The ambitious high-speed rail project was due to be completed by 2023, but has been delayed due to land acquisition issues as well as the Covid-19 pandemic.
The 508 km long Mumbai-Ahmedabad High Speed Rail (MAHSR) project is being executed with financial and technical assistance from the Japanese government at a cost of ₹1,08,000 crore.
September 23, 2022