Of the 21 km, 16 km will be built using tunnel-boring machines (TBM), while the remaining 5 km will be constructed using the New Austrian Tunneling Method (NATM). This includes a 7-km undersea tunnel at Thane Creek.
The construction work for the Mumbai-Ahmedabad bullet train has made significant progress across various locations
At ADIT (Additionally Driven Intermediate Tunnel) portal, a 394-metre-long tunnel was completed last May in a record time of six months. This has facilitated two additional NATM faces for excavation, in addition to the Shilphata site. As a result, 1,111 metres of tunnelling work has been achieved so far, with 622 metres completed towards BKC and 489 metres towards Ahmedabad
ADIT, which measures 11x6.4 metres, will provide direct vehicular access to the main tunnel during both construction and operations and could also be used for emergency evacuations if necessary
On Saturday, Railway Minister Ashwini Vaishnaw inspected the work of the undersea tunnel of the Mumbai-Ahmedabad High Speed Rail Corridor and expressed satisfaction at the "good progress" on the mega multi-billion dollar project
The technology being employed and the design of the tunnel makes it possible for two trains to pass through at speeds of 250 kilometres per hour, the Union Minister said
Environment protection has been taken care of along with ventilation and lighting, he added
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