The breakthrough in the first mountain tunnel in the Mumbai-Ahmedabad high speed rail corridor, popularly called the bullet train, was achieved on Thursday in Valsad in Gujarat, the National High Speed Rail Corporation Limited (NHSRCL) said. The tunnel, which is located some 1 kilometre away from Zaroli village in Umbergaon taluka in Valsad in the neighbouring state, was completed in 10 months using the New Austrian Tunnelling Method (NATM), the NHSRCL release said.
“The comprises a tunnel, a tunnel portal, and other connecting structures like a tunnel entrance hood. The 350-metre long tunnel has a diameter of 12.6 metres and a height of 10.25 metres. The single tube horseshoe-shaped tunnel will have two high-speed train tracks passing through it,” it said.
