Earlier this week, the Continental Engineering Co. – ITD Cementation India Ltd. – Tata Project Ltd. JV completed casting the first concrete segment for building the twin tunnels of their 6.081 km UGC-04 section of Mumbai Metro’s 33.5 km Colaba – SEEPZ line.
Roughly 4000 segments will be cast for package UGC-04 (Siddhivinayak – Shitladevi) using molds at CEC-ITD-TPL JV’s casting yard in Wadala, stacked up like this, transported on-site and be fed into the three Herrenknecht TBMs which’ll be commissioned in the last quarter of this year to excavate & build this section’s tunnels.
Casting work began on March 7 in an event attended by the MMRCL’s MD, Ashwini Bhide, and other officials from the contractor’s team:
Final look after being cast:
A tunnel ring is typically 1.4 m wide, and consists of 5 segments + 1 ‘key’ segment. For the entire 33.5 km line, approximately 40,000 segments will be cast for all 7 civil packages.
I’ve shared this before but it’s a perfect time to rewatch this excellent video demonstrating how the segments will be used to build rings for Mumbai Metro’s tunnels when the 17 TBMs are commissioned one after the other from the under construction TBM shafts later this year. Skip to 5 mins and 15 seconds if it doesn’t automatically do so.
For more updates, check out the Mumbai section of the Metro Rail Guy!