Metros Tenders

Tata’s Chennai Metro Phase 2 TBM S97 Records 4th Breakthrough

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Tata Projects Ltd. (TPL) today afternoon celebrated tunnel boring machine S97’s breakthrough at Madhavaram High Road Station for the 116.1 km Chennai Metro Phase 2 project.

Nicknamed TBM Podhigai, this was S97’s first ever tunnel breakthrough and the 4th of 24 breakthroughs planned on 45.4 km Line-3‘s civil construction Package TU-01 connecting Venugopal Nagar – Kelly’s.

TPL’s tunneling crew had commissioned this Ø6.61m diameter Terratec Earth Pressure Balance (EPB) machine from Madhavaram Milk Colony Station’s south shaft in mid-January 2023. It traveled approximately 1.4 kms in 9.5 months to build the down-line tunnel towards Kelly’s.

View of Madhavaram High Road’s Shaft; Up-line tunnel on right was built by TBM S96 – Photo by Ananya Das

Chennai Metro Rail Ltd. (CMRL) had awarded Tata Projects with Package TU-01’s Rs. 1999 crore contract in May 2021 with a 42 month deadline.

TBM Podhigai along with 6 other TBMs will build approximately 9 km twin tunnels (total 18 km) on Line-3’s Venugopal Nagar – Kellys underground section. The scope also includes construction of diaphragm walls, entry/exit structures of Madhavaram Milk Colony Station, Murari Hospital Station, Ayanavaram Station and Purasaiwakkam High Road Station.

CMRL’s May 2023 updated Chennai Metro Phase 2 Map – view Phase 2 information & route map
Photo by Ananya Das
Tata’s Chennai Metro Phase 2 TBM S97 Records 4th Breakthrough
Photo by Ananya Das
Photo by Kshitij Dhawale

With this development, 4 tunnels have been built connecting Venugopal Nagar – Madhavaram Milk Colony – Madhavaram High Road stations, a distance of roughly 2.5 kms including station boxes.

TBMs for all 4 were launched from Madhavaram Milk Colony. Recap of breakthroughs:

  • June 2023: TBM S98 (Anaimalai) at Venugopal Nagar – 415m
  • August 2023: TBM S96 (Nilgiri) at Madhavaram High Road – 1.4 km
  • September 2023: TBM S99 (Servarayan) at Venugopal Nagar – 415m
  • November 2023: TBM S97 (Podhigai) at Madhavaram High Road – 1.4 km (this post!)

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? Get early-access to updates and support the site over here.

– TMRG





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