Monday, July 22, 2024

ITD Cementation Initiates Tunneling for Chennai Metro Line-4 with TBM Pelican at Panagal Park

ITD Cementation India has officially launched the tunnel boring machine S-1075B, named TBM Pelican, at the Panagal Park Crossover’s Launch Shaft for the construction of underground tunnels on Chennai Metro‘s Line-4, spanning 26.1 km from Poonamallee Bypass to Light House.

TBM Pelican marks the initiation of excavation activities for Package UG-2 (Kodambakkam Flyover to Boat Club) within the larger 116.1 km Chennai Metro Phase 2 project. It is the third tunnel boring machine to commence tunneling on Line-4, following TBM Flamingo (S-1352A) and TBM Eagle (S-1073B), both deployed from Light House Station under Package UG-1.

TBM Pelican

This 06.67m Herrenknecht EPB machine, previously known as TBM Krishna-3, had successfully constructed three tunnels for Package UGC-04 of Mumbai Metro’s 33.5 km Line-3 (Aqua Line) under the CEC – ITD – Tata JV. After refurbishment and passing factory acceptance tests (FAT) in August 2023 at Herrenknecht’s Tamil Nadu plant, the machine’s components were lowered into Panagal Park’s shaft earlier this month.

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Chennai Metro Map

TBM Pelican is tasked with excavating and constructing a tunnel of approximately 1100 meters for the up-line from Panagal Park Crossover to Kodambakkam in its initial assignment. According to CMRL’s press release, the machine will dig at a maximum depth of 18.5m, with an expected arrival at Kodambakkam by December 2024.

TBM Pelican

ITD Cem was awarded Line-4’s underground contracts, namely packages UG-01 (5.15 km) and UG-02 (4.87 km), by Chennai Metro Rail Ltd (CMRL) in January 2022. The combined contract value is Rs. 3743.24 crore, with a 48-month deadline.

TBM Pelican

The progress of TBM tunnels on Line-4 includes:

  • S-1352A (Flamingo) on UG-01: Started tunneling in September 2023, with approximately 165m tunnel built so far.
  • S-1073B (Eagle) on UG-01: Initiated tunneling in mid-January 2024, with approximately 30m tunnel built so far.
  • S-1075B (Pelican) on UG-02: Commissioned at Panagal Park’s Crossover.
  • S-1074B (Peacock) on UG-02: Passed FAT in April 2023; scheduled for lowering next (anticipated launch on April 1).

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