en.Wedoany.com Reported - The Mumbai-Ahmedabad High-Speed Rail project in India recently completed the hoisting and lowering of the first tunnel boring machine cutterhead in Vikhroli. Weighing 350 tonnes and with a diameter of 13.6 meters, the cutterhead forms the front section of the tunnel boring machine, and the initial assembly of the main shield body has been completed.

The Mumbai tunnel spans a total length of 21 kilometers, of which 16 kilometers will be excavated using two tunnel boring machines, each weighing over 3,000 tonnes. The tunnel includes a 7-kilometer section beneath Thane Creek, which upon completion will become India's first underwater railway tunnel. These two TBMs are the largest ever deployed for railway tunnel construction in India.

The cutterhead is designed to bore a large-diameter single-tube tunnel accommodating both the up and down lines of the high-speed rail corridor. It was delivered to the site in five batches and assembled using 1,600 kilograms of precision welding. The cutterhead is equipped with 84 disc cutters, 124 scrapers, and 16 bucket lips.

This tunnel is one of the most complex sections of the Mumbai-Ahmedabad High-Speed Rail project. The completion of this cutterhead hoisting marks a new phase in the underground construction of the high-speed rail corridor.

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