en.Wedoany.com Reported - Project authorities announced that the third mountain tunnel, MT-07, on the Maharashtra section of the Mumbai-Ahmedabad High-Speed Rail corridor has recently broken through. Located in Ambessari village, Dahanu taluka, Palghar district, this tunnel is the third mountain tunnel to be completed in the state within five months. A government minister noted the progress on social media, highlighting the rapid advancement of this technically challenging section.
The MT-07 tunnel is 417 meters long and 14.4 meters wide, designed to accommodate both the up and down tracks of the high-speed rail line. The construction team employed controlled drill-and-blast excavation from both ends and applied industry-standard methods to integrate structural support and track smoothness to meet high-speed operation requirements. The entire construction process was supported by advanced engineering techniques and safety protocols.
During construction, the team deployed advanced monitoring systems and geotechnical instruments, including surface settlement points, 3D targets, strain gauges, and seismographs, to track vibrations and tunnel behavior in real time, while managing on-site safety with ventilation, fire safety systems, and access control. Engineers noted that continuous geotechnical monitoring and data-driven adjustments were key to achieving precise construction and risk management.
Previously, several tunnels on the Maharashtra section have been completed, including the 1.5-kilometer MT-05 tunnel near Safar and the 454-meter MT-06 tunnel constructed using the New Austrian Tunneling Method. Of the seven mountain tunnels under construction in the state, three have been completed; excavation progress on MT-03 has exceeded 80%, and MT-04 is nearing 60%. Tunnel work between Vapi and Boisar has been completed, and construction of the industrial corridor connecting Boisar and Vapi is progressing rapidly.
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