After recommissioning Surya-1 on New Year’s Eve, workers from Larsen & Toubro – Shanghai Tunnel Engineering Company (L&T – STEC) JV on Saturday recommissioned tunnel boring machine Surya-2 from Hutatma Chowk towards Chhatrapati Shivaji Maharaj Terminus (CSMT) for Mumbai Metro’s 33.5 km Line-3 (Aqua Line).
This Robbins Crossover XRE TBM had recorded a breakthrough in October at the southern-end of Hutatma Chowk Station’s 233 meter NATM-mined tunnel and then tunneled right through it to get towards its northern-end. This would have generated the most unique tunneling sight in India, and I really hope its movement was captured by MMRC, Robbins or L&T-STEC in a timelapse!
Update: A cool video of Surya-2’s cutterhead spinning can be viewed here. The entire video is nice to watch, but if you’re short on time – skip to 2:21.
The machine now been recommissioned on its 4th assignment for Package UGC-01 towards CSMT (or CST) Station to build its final 556 meter long tunnel for Line-3’s down-line.
All of the rings built by Surya-2 within Hutatma Chowk Station will be dismantled in the coming months as the NATM tunnel (everything you see above) will house the station’s down-line platform area as seen in the below graphic. Tracks will be laid exactly where the TBM is right now.
With this development, here’s a status of package UGC-01 between Cuffe Parade and CST stations where 2 breakthroughs are pending, both at CST. This table is best viewed on a desktop device –
|1||Up||Cuffe Parade||Vidhan Bhavan||1128m||Completed|
|1||Up||Hutatma Chowk||CST||551m||In Progress|
|2||Down||Cuffe Parade||Vidhan Bhavan||1254m||Completed|
|2||Down||Hutatma Chowk||CST||556m||Now in Progress (this post!)|
The city now again has 5 active TBMs. 35 breakthroughs have been recorded so far (view last) and the following 7 are pending:
|UGC-01||Hutatma Chowk – CST (up-line)||551m, In Progress|
|UGC-01||Hutatma Chowk – CST (down-line)||556m, In Progress (this post!)|
|UGC-03||Science Museum – Mahalaxmi (up-line)||1118m, In Progress|
|UGC-03||Mahalaxmi – Mumbai Central (up-line)||837m, Not Started|
|UGC-03||Science Museum – Mahalaxmi (down-line)||1136m, In Progress|
|UGC-03||Mahalaxmi – Mumbai Central (down-line)||830m, Not Started|
|UGC-06||Sahar Road – CSIA T1 (up-line)||1516m, In Progress|
For more updates on India’s metro systems, check out my Home Page!