Tunnel boring machines S97 and S98 last week arrived at Chennai Port in Tamil Nadu for constructing Package TU01 of the 118.9 km Chennai Metro Phase 2 project.
Both Ø6.61m earth pressure balance (EPB) machines, manufactured by Terratec in China, will be deployed by Tata Projects Ltd. (TPL) along with 5 other TBMs to construct approximately 9 km twin tunnels (total 18 km) on the new 45.813 km Line-3’s Venugopal Nagar – Kellys section.
TPL was awarded Phase 2’s Package TU-01 Rs. 1999 crore contract by CMRL in May 2021 with a 42 month deadline.
Scope of TU01: Construction of approximately 9 km twin bored tunnels (total = 18 km) from the TBM Retrieval Shaft near Venugopal Nagar (of Line-5) to Kellys Station, and the construction of diaphragm walls, entry/exit structures of Madhavaram Milk Colony Station, Murari Hospital Station, Ayanavaram Station and Purasaiwakkam High Road Station, including launching and retrieval shafts at the above stations.
Tata’s tunneling plan with 7 TBMs 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.
As shared earlier, I reckon the 4th and final new machine in Terratec’s pipeline will likely have a serial number of S99. I hear Tata plans to refurbish and deploy Terratec TBM S81 from Pune and another 2 Herrenknecht machines from Singapore.
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