Mumbai-Ahmedabad high-speed rail: NATM tunnel set for breakthrough on sept 20 | Mumbai News
The Mumbai-Ahmedabad High Speed Rail project is likely to achieve a major milestone on Saturday with the final breakthrough of its NATM (New Austrian Tunnelling Method) tunnel. What is NATM➤ Unlike machine-driven tunnelling, NATM uses the surrounding ground as a natural support system➤ Concrete is sprayed on tunnel walls to stabilise the structure as work…
