Chennai Metro Train

Officials of Chennai Metro Rail Limited (CMRL) said that, tunnelling work at the Nehru Park Metro Rail site has been progressing well despite challenging soil conditions. With two tunnel boring machines (TBMs) from China shipped to the country in December, 2011 — as part of an agreement

between CMRL, joint venture partners Larsen and Toubro and Shanghai Urban Construction Group — this site was the first to begin tunnelling work in July 2012. At present Metro Rail uses 11 TBMs at various sites across the city. The machines tunnel passages that will eventually connect underground stations.

The first TBM at the Nehru Park site that began tunnelling in July has completed 565 metres and the second one, which started in October, has drilled 455 metres. The two machines still have 939 metres to tunnel through from Nehru Park station to Egmore station. The TBMs are drilling about 8-10 metres a day. However, this varies depending upon soil condition.

Sources said that it may take another six months for tunnelling work to be completed at this station. Underground station work is expected to be completed by April 2015.

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Chennai Metro Rail - Status