TBM S711 Makes a Breakthrough at Chennai Metro’s Korukkupet Stn

TBM S711 – a Herrenknecht tunnel boring machine operated by Afcons Infrastructure today made a successful breakthrough at Chennai Metro’s Korukkupet Station in north Chennai – 5 months ahead of its scheduled target of February 2018.

After building tunnels for Chennai’s UAA-01 project, this TBM was commissioned on April 25 2017 from the Washermenpet Station to build the 1818.6m down-line tunnel of the 2.4 km UAA-08 project between Washermenpet and Korukkupet on the 32.10 km Line-1 between Chennai Airport and Wimco Nagar. The earth pressure balance machine built a total of 1299 rings in just 5 months aided by north Chennai’s favorable soil profile which comprises of silty sand, fine sand and clay. Along the way, it made a ‘hidden’ breakthrough at Sir Theagaraya College Station in June as the station’s excavation was still underway.

Package UAA08: Washermenpet – Korrukupet – view Chennai Metro map & information

Perforated D-wall – Photo Copyright: Karthick

Photo Copyright: Afcons

Breakthrough! – Photo Copyright: Afcons

Photo Copyright: Afcons

Photo Copyright: Afcons

Local news coverage –

The 1st TBM on this section, a Robbins EPB machine, was commissioned in March 2017 to build its parallel up-line tunnel and has another 330 rings (approx 462m) left to reach Korrukupet Station.

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

– TMRG

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Global traveler who prefers mass rapid transit

10 Responses to "TBM S711 Makes a Breakthrough at Chennai Metro’s Korukkupet Stn"

  1. Akhil says:

    So just 3 more pending now….can’t wait. What is the status of 703 and 704?

    Reply
  2. RUPRAJ SENGUPTA says:

    Is this the new extension or the section abandoned by gammon india ltd

    Reply
    • Ashok says:

      This is the new extension.

      Three breakthroughs expected next month. One on this extension line and 2 more at AG-DMS on Anna Salai( Mount Road).

      With this all tunneling work for phase one would be complete.

      Reply
  3. Kumaran says:

    When station construction will start for elevated corridor from TONDIARPET to WIMCO NAGAR?

    Reply

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