Afcons Begins D-Wall Work for Ahmedabad Metro’s TBM Launch Shaft

After starting work to cast guide walls in July, workers from Afcons Infrastructure have now moved on to the next step of building a diaphragm wall (D-wall) for their tunnel boring machine (TBM) launch shaft at the East Ramp in Apparel Park on Ahmedabad Metro’s 20.737 km east-west line between Vastral Gam and Thaltej Gam.

Once the shaft is ready, Afcons plans to deploy two refurbished Herrenknecht TBMs which previously saw action in Chennai to build tunnels on packages UAA-01, UAA-05 & UAA-08 (either S710, S711, S717 or S718) in mid-2018 to build the line’s tunnels as part of a Rs. 784.80 crore contract for the 2.446 km underground Package-1 which got awarded in January 2017. Their scope of work involves the construction of twin tunnels from the East Ramp to Kalupur Railway Station through 2 underground stations at Kankaria East and Kalupur Railway Station.

6.83 km underground section of Ahmedabad Metro’s Phase 1 – view Ahmedabad Metro map & info

Hydraulic grabber trenching the D-wall – Photo Copyright: Divyanshu Sharma

Photo Copyright: Divyanshu Sharma

Here’s a nice video demonstrating the role of the grabber while building the D-wall –

For more updates, check out the Ahmedabad section of The Metro Rail Guy!

– TMRG

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Global traveler who prefers mass rapid transit

7 Responses to "Afcons Begins D-Wall Work for Ahmedabad Metro’s TBM Launch Shaft"

  1. Ash says:

    I think L&T has also started d wall work?

    Reply
    • TMRG says:

      From what I hear, their machine broke down while starting work. Prior to this, they faced (continue to face?) land acquisition issues.

      Reply
  2. Nirakar raut says:

    Hello sir, good project Ahmedabad

    Reply
  3. Nihar Desai says:

    when afcon infrastructures will launch TBM?

    Reply
  4. Devarsh Prajapati says:

    What is the update about Vastral Gam – Apperal Park stretch??? From when will testing will start in this stretch???

    Reply
    • TMRG says:

      Viaduct is largely completed, but the stations are still under construction. MEGA has still not awarded the rolling stock contract. Without any trains, there can be no tests!

      Reply

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