- Second Tunnel Boring Machine takes shape 39 metres below ground at Savli
- 190-tonne gantry lowered in precision move for Mumbai-Ahmedabad High-Speed Corridor
- Mega engineering feat set to drive tunnelling from Savli to Vikhroli by July 2026
NE INFRASTRUCTURE BUREAU
AHMEDABAD, APR 11
In a striking display of engineering precision beneath the surface, the assembly of the second Tunnel Boring Machine (TBM) for the ambitious Mumbai–Ahmedabad High-Speed Rail Corridor has begun at Savli near Ghansoli in Mumbai—nearly 39 metres below ground level.
Marking a critical milestone, a massive 190-tonne gantry—measuring 18 metres in length, 10 metres in width, and 9 metres in height—was successfully lowered into the shaft, underscoring the scale and complexity of underground construction for India’s first bullet train project.
Precision Engineering in Confined Depths
With space constraints at the Savli shaft posing significant challenges, the assembly of the 39-metre-long TBM has been meticulously planned and executed underground. The operation reflects high-end coordination, safety protocols, and cutting-edge engineering practices.
The two TBMs deployed for this stretch will be supported by four gantries, which will be connected to the main shield assembly and cutterhead.
Mobile Backbone of Tunnel Construction
These gantries will move along with the TBM through the completed tunnel, enabling crucial operations such as excavation, waterproofing, and installation of tunnel lining segments—core processes that ensure structural stability and longevity of the tunnel.
Countdown to Tunnelling Begins
Once fully assembled, the TBM is expected to begin its tunnelling mission from Savli to Vikhroli by July 2026, carving a vital underground link in the high-speed rail corridor.
This underground engineering marvel not only exemplifies India’s growing capability in executing complex infrastructure projects but also accelerates progress towards a transformative, high-speed transportation network.
