Tunnel Boring Machines for undersea bullet train project to arrive in Mumbai on March 23

Usually, TBMs with cutter heads of 5 or 6 meter diameter are used for urban tunnels used in the MRTS Metro system. The package C2 of the Mumbai-Ahmedabad High Speed Rail Project, under which the undersea tunnel comes, is being executed by Afcons Infrastructure Ltd. The whole package involves a 20.37 km-long tunnel. “Of this, 4.8 km has been completed through the New Austrian Tunnelling Method (NATM) in September 2025, while the remaining 15.489 km will be bored through these TBMs (Tunnel Boring Machine). This tunnel will go about 25 to 65 Meters deep from the ground level,” an official…