China-based tunnel boring machine (TBM) manufacturer Shanghai Tunnel Engineering Company (
These two Ø6.65m Earth Pressure Balance TBMs are part of a 3 TBM order and will be deployed by Larsen & Toubro and Shanghai Tunnel Engineering Company (L&T – STEC JV) to build twin tunnels on the line’s 4.157 km package UGC-07, between Marol Naka – MIDC – SEEPZ – Aarey Colony Ramp, which was awarded by the Mumbai Metro Rail Corporation Ltd. in July 2016.
Both TBMs were previously utilized to build tunnels for the Downtown MRT Line on Singapore’s metro system, and were since put through an exhaustive refurbishment plan to make them reusable for Mumbai’s conditions. The L&T-STEC JV is currently building 2 TBM launch shafts at Pali Ground in Marol Naka and at Sariput Nagar in Aarey Colony, and plans to begin tunneling works by the end of this year.
The cutterhead of the 3rd TBM can be seen lying above.
Here’s a cool drone view I recently shared on Twitter of L&T-STEC’s Pali Ground Shaft in Marol from where 2 of the 3 TBMs will be commissioned –
• Package UGC-02 – 1 Terratec TBM in China (new)
• Package UGC-04 – 1 Herrenknecht TBM in China (new)
• Package UGC-05 – 2 Terratec TBMs in Delhi (refurbished)
• Package UGC-07 – 2 STEC TBMs in Singapore (refurbished)
For more updates, check out the Mumbai section of The Metro Rail Guy!