Afcons Infrastructure achieves longest tunnelling drive for DMRC in Delhi Metro Phase-4 – CNBC TV18
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S Paramasivan, Managing Director, Afcons Infrastructure Ltd, said, “Tunnel Boring Machine (TBM) AMRIT successfully completed 2.65 km of boring through mixed soil and hard rock strata today. It is the longest tunnelling drive in Phase-IV of the Delhi Metro.”
Paramasivan added that frequent cutter replacements were required to bore through the hard rock. “The tunnel drive alignment was meticulously planned to avoid passing beneath heritage structures adjacent to Mehrauli Badarpur Road.”
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The DC-07 package includes three stations, 11.26 km of tunnelling, a 223-metre ramp, and a 119-meter cut-and-cover section. The three underground stations are Maa Anandmayee Marg Station, Tughlakabad Railway Colony Station, and Tughlakabad Station. This package is part of the Aerocity to Tughlakabad Corridor (Line-10) of Phase-IV of the Delhi Metro, with a total route length of 23.62 km.
The 105-metre-long TBM was used to achieve this breakthrough. The new tunnel has been constructed at an average depth of approximately 16 metres, with around 1,894 structural rings installed, each with an inner diameter of 5.8 meters.
Two parallel circular tunnels for up-and-down movement are being constructed along this stretch as part of the Aerocity–Tughlakabad corridor. The breakthrough on the other parallel tunnel is expected in January 2025.
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Shares of Afcons Infrastructure Ltd ended at ₹526.20, up by ₹29.20, or 5.88% on the BSE.
