2nd TBM makes a Breakthrough at Jaipur Metro’s Badi Chaupar Station

Note – just like the 1st TBM, a traditional breakthrough wasn’t accomplished here by TBM 2. An excavator was brought in to excavate the retrieval shaft in which the TBM had been sitting for about a year’s time.

Yesterday, the 2nd Robbins Tunnel Boring Machine, operated by the CEC-CICI JV to build Jaipur Metro’s 2.35 km UG-1B package, revealed itself to workers after excavation work concluded on its side of the eastern shaft at Line-1’s Badi Chaupar Station.

This Ø6.52m Earth Pressure Balance TBM was commissioned from the operational Chandpole Station’s north shaft in October 2015 to build the down-line tunnel under the city’s historic district and had to be operated with utmost precision.

To rehash from the other post, geology for the contractor was not a concern as it comprised of silty sand and minor amounts of gravel & clay. The TBM took a long time due to the presence of weak heritage buildings (such as the 300 year old Chandpol Gate) strewn throughout its influence zone and the painful relocation of 13 temples on sites earmarked for the Chhoti Chaupar and Badi Chaupar Stations. As such, this TBM also sat idle at different places at different times, including inside the TBM retrieval shaft for about a year waiting for excavation work to commence and be completed.

2.35 km underground section of Jaipur Metro – view Jaipur Metro map & information

Some images –

Photo Copyright: Nandakumar Nandu

Photo Copyright: Nandakumar Nandu

Photo Copyright: Nandakumar Nandu

Photo Copyright: Nandakumar Nandu

Jaipur’s TBM 2 (left) and TBM 1 (right) – Photo Copyright: Nandakumar Nandu

For more updates, check out the Jaipur section of the 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

3 Responses to "2nd TBM makes a Breakthrough at Jaipur Metro’s Badi Chaupar Station"

  1. Moneesh says:

    If this is the first breakthrough then what happened at Chhoti Chaupar station? Did both Tbms pass through it?

    Reply
    • TMRG says:

      Correct! In fact both TBMs passed through the Badi Chaupar Station as well. Going forward, they’ll demolish/remove the temporary rings built within the station boxes.

      Reply
  2. Yatendra Kumar Sharma says:

    It is proud-full moments to me that i was part of team this project and grate achievement to all team members but i left this team four month ago, however very very congrats to all workers and engineers to hard working in heritage city to successfully completed the tunnel work.

    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 *