L&T’s Chennai Metro TBM S1326A Passes Factory Tests

Tunnel boring machine manufacturer Herrenknecht this week completed factory acceptance tests (FAT) on S-1326A – their 2nd of 2 new machines for Package TU02 of the 118.9 km Chennai Metro Phase 2 project.

This 100m long Ø6.65m earth pressure balance (EPB) machine will be deployed by Larsen & Toubro along with 7 other TBMs to construct approximately 12 km twin tunnels (total 24 km) on the new 45.813 km Line-3 between Kellys and Taramani Road Junction stations.

Image via Saurabh Raju

L&T was awarded Chennai Metro Phase 2’s Rs. 2385 crore contract by CMRL for Package TU-02 in May 2021 with a 42 month deadline.

Scope of TU02: Construction of approximately 12 km twin bored tunnels (total = 24 km) from Kellys Station to Taramani Road Junction and the construction of diaphragm walls, entry/exit structures of Chetpet station, Royapettah Government Hospital Station, Thiruvanmiyu Station, and part diaphragm wall of Greenways Road Station, including launching and retrieval shafts at the above stations.

Line-3’s underground section: Venugopal Nagar – Kellys – Taramani Road Junction | Map via Chennai Metro Rail Ltd. includes my edits
Image via Ravi Kiran Bhat

L&T’s tunneling plan with 8 TBMs still remains unknown to me at this time. If someone reading this is aware, then leave a comment below or shoot me a message via the Contact page.

Earlier this month, Herrenknecht completed FAT for their first machine TBM S1327A – see images and details.

L&T will in addition deploy 4 new CRCHI machines and 2 refurbished Robbins machines from Mumbai Metro Line-3’s Package UGC-01. Both machines’ parts are currently stationed at L&T’s Tunnelling Excellence Academy near Kanchipuram.

For more updates, check out the Chennai section or my Home Page! Sign up for free instant email notifications on new posts over here. Like this post? See how you can get early-access to updates and support the site over here.


written by

Global traveler who prefers mass rapid transit

2 Responses to "L&T’s Chennai Metro TBM S1326A Passes Factory Tests"

  1. Madan Mk says:

    Chennai rich no 1

  2. Rakesh dey says:

    Chennai metro best .


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