Chennai Metro realized a big milestone when TBM “Vaigai” successfully finished the Tunneling of Mandaveli Station under Phase-2, exhibiting precision engineering and solidifying the city’s sustainable transportation growth.

This is reported by the railway transport news portal Railway Supply.

Chennai Metro Marks Major Milestone with TBM Breakthrough
Photo: Chennai Metro

Chennai Metro Expands Phase-2 Network

Chennai Metro Rail Limited (CMRL) achieved an historic occasion of the Phase-2 program as the Tunnel Boring Machine “Vaigai” emerged at Mandaveli Station on October 18, 2025.

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The marvel, handed over by Larsen & Tubb, sees the completion of 775-meter stretch between Greenways Road and Mandaveli, which happens to be the most intricate urban stretch of the metropolis.

Officials like Director (Projects) T. Archunan were present on the occasion along with engineers and consultants. Officials appreciated the systems and the operation executed in safety under highly inhabited colonies.

Since the pipeline traverses narrow passageways of key utilities, engineers strategized each step to prevent disruptions and long-term hazard.

Chennai Metro Drives Innovation and Engineering Excellence

The TBM faced silty sand and bedded soil that required closed-face operation to achieve ground stability. 13 cutterhead interventions were carried out by the crews within the 610-day drive, maintaining precision and constant functionality.

Meanwhile, TBM “Noyyal” makes steady advances on the downline parallel and should exit next month, keeping the project on schedule. This month, alone, the Chennai Metro made three advances — at Mandaveli, Kodambakkam, and R.K. Salai — beckoning quicker tunneling movement throughout the Phase-2.

Each of these successes solidifies Chennai’s dedication towards sustainable transportation and progressive infrastructure growth. With increasing number of innovations to come, CMRL’s engineering experience goes on constructing a strong metro link between economic centers, residential areas, and business centers throughout the metropolis.

The initiative showcases the power of innovation, planning, and public-private partnership to reshape urban transportation in south Asia’s largest metropolitan area.

Source: railanalysis.in

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What is the latest achievement of Chennai Metro?

Chennai Metro achieved a major Phase-2 milestone when TBM “Vaigai” completed the 775-meter Mandaveli tunnel, marking one of its most challenging underground breakthroughs.

How does Chennai Metro ensure safety during tunneling?

CMRL uses closed-face TBMs, continuous ground monitoring, and detailed utility mapping to prevent disruptions and guarantee public safety throughout construction.

When will Chennai Metro complete Phase-2 tunneling?

Officials expect multiple breakthroughs, including from TBM “Noyyal,” in the coming months, with full Phase-2 completion targeted for the late 2020s as progress accelerates across all corridors.

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