CEC-ITD-TPL JV Casts 1st Tunnel Ring Segment for Mumbai’s Line-3

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:

Photo Copyright: Surendra Giri

Rebar framework of the segment – Photo Copyright: Surendra Giri

Molds – Photo Copyright: MMRCL

Photo Copyright: MMRCL

Photo Copyright: Surendra Giri

Ready to pour concrete – Photo Copyright: MMRCL

Final look after being cast:

Photo Copyright: Joyanta Dey

Photo Copyright: Joyanta Dey

Photo Copyright: MMRCL

Photo Copyright: Joyanta Dey

Photo Copyright: MMRCL

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!

– TMRG

Share this post!
Share on FacebookTweet about this on TwitterDigg thisShare on LinkedInPin on PinterestShare on RedditShare on Google+Share on StumbleUponShare on TumblrEmail this to someonePrint this page

written by

Global traveler who prefers mass rapid transit

12 Responses to "CEC-ITD-TPL JV Casts 1st Tunnel Ring Segment for Mumbai’s Line-3"

  1. Mahesh Dattani says:

    Sir, are all yards located in Wadala?

    Reply
    • TMRG says:

      Hi, Wadala has yards for UGC-01, UGC-02, UGC-03, UGC-04 & UGC-06.
      UGC-05’s yard is in BKC while UGC-07’s yard is along the JVLR.

      Reply
  2. Shreeharsha Phene says:

    Mr TMRG,
    Interesting post and video explains the working of TBEM .
    One question ,you have mentioned that the Tunnel Ring is about 1.4 mts, and therefore the quantity of 4000 tunnel rings for approx. 6 km ring appears in line.
    However in the post you have mentioned that for entire 33.5 kms approx. 40,000 rings will be placed , this, prima facie does not reconcile , with the 1.4 mts. ring.
    Is any thing that I am missing ?

    S. V. Phene

    Reply
    • TMRG says:

      Great question! Typically the tunnels built by TBMs are somewhere around 1/2 to 3/5 of the entire line’s length. Mumbai’s underground section consists of several different parts: 7 shafts (25m long), 26 stations (250-300m long) and tunnels built by (a) cut & cover (b) TBMs and (c) NATM tech.

      I don’t have the exact length of all stations and tunnels, but as per the MMRCL, the TBMs will use approximately 40,000 of these segments.

      Reply
      • Virender Thakur says:

        It is due to two parallel tunnels Upline and Dnline. Hence the quantity doubles less no rings will be there in Station areas.
        Regards
        Virender Thakur

        Reply
      • Virender Thakur says:

        It is due to twin tunnels less the length of station boxes in entire section.

        Reply
  3. Shreeharsha Phene says:

    Mr TMRG,
    Thanks to you and Virendra for clarifying the issues.
    Based on the explanations ,I have done a broad reconciliation of no of Tunnel Rings as follows.

    Total Length of Metro 3 33.5 Kms = 33,500 Mts

    Less 27 Stations each of 200 Mts 5.4 Kms = 5,400 Mts

    Tunnel Length 28.0 Kms = 28,000 Mts

    Tunnel Ring length 1.4 Mts
    Therefore tunnel Rings 20,000 for a line.
    Therefore tunnel Rings for both Up line and Dnline 40,000.

    Kindly confirm this is in order.

    Reply
  4. Virender Thakur says:

    Ok

    Reply
  5. Bhatia says:

    Today, there was news about Metro 10 (Dahisar- Bhayander) being sent for Feasibility Study and may be approved by the year-end. What about Metro 8 and Metro 9? On which routes they are supposed to be planned?

    Reply
    • TMRG says:

      Line-8: Wadala – GPO(CST) – a southward extension of Line-4
      Line-9: Andheri (E) – Bandra (E) – a southward extension of Line-7

      Honestly, I don’t see why the MMRDA had to use a new set of numbers for these extensions. Perhaps for administrative reasons? Hopefully it remains that way because new users could find it confusing and might believe they need to get off and switch trains.

      Reply

Leave a Reply

Want to join the discussion?
Feel free to contribute!

Leave a Reply

Your email address will not be published. Required fields are marked *