India’s Bullet Train to Pass Through 21 Km Under Arabian Sea
New Delhi: India is set to achieve a significant milestone in global engineering with the construction of a 21 km long undersea tunnel beneath the Arabian Sea, as part of the Mumbai-Ahmedabad High-Speed Rail Corridor. This tunnel, a crucial element of India’s first bullet train project, will revolutionize transportation between two of the country’s most prominent cities. The tunnel will stretch from Maharashtra’s Bandra-Kurla Complex (BKC) to Shilphata, including a 7 km segment under Thane Creek, known for its ecological sensitivity.
The project involves the use of advanced Tunnel Boring Machines (TBMs) with cutter heads measuring 13.1 metres in diameter, significantly larger than those used in metro systems. These machines will excavate 16 kilometres of the tunnel, while the remaining 5 kilometres will be completed using the New Austrian Tunnelling Method (NATM). This underwater tunnel, designed as a single tube with two tracks, will enable the bullet train to reach speeds of up to 320 kilometres per hour.
The construction, set to begin soon, will be carried out at three locations: Ghansoli, Shilphata, and Vikhroli. The decision to build underground is driven by the need to protect the Flamingo Sanctuary and Mangrove Forest in Thane Creek, as well as to avoid the challenges of land acquisition in densely populated Mumbai. The National High-Speed Rail Corporation Limited (NHSRCL) has taken measures to ensure environmental compliance, including controlled blasting operations to minimize noise and air pollution, marking a significant step forward in India’s infrastructure development.
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