AHMEDABAD (Metro Rail News): A major development unfolded in the ambitious bullet train project in India, with L&T recording the first mountain tunnel breakthrough in Package C4 of the 508.17 Km long Mumbai – Ahmedabad High-Speed Rail (MAHSR) project near Zaroli Village in Guajarat’s Valsad on Thursday.
The tunnel runs 350 meters in length, 10.25 meters in height & 12.6 meters in diameter. It is technically a single-tube horseshoe-shaped tunnel to have parallel tracks for the high-speed trains, which has been built using the New Austrian Tunneling Method (NATM) that stands as a testament to modern-day technological advancement in construction.
The Mumbai-Ahmedabad High-Speed Rail Project will have 7 mountain tunnels, all of which will be constructed using the NATM, which basically entails making holes in the tunnel face, drilling holes, charging explosives and Controlled blasting. The remaining 6 tunnels are located in Maharashtra on the C3 Package.
NHSRCL had awarded Package C4’s civil construction contract to L&T at an estimated cost of Rs 24,985 in November 2020. It’s the longest of the 8 packages in the MAHSR project representing 46.66% of the total. The scope of the contract entails the construction of Surat Depot, 14 river crossings, 42 road crossings and 6 railway crossings.
MAHSR is the first high-speed railway corridor in India that is being built between Mumbai and Ahmedabad at an estimated cost of 1.08 lakh crore.
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