Special tunnel boring machines to be deployed for Chennai Metro’s phase II project
2 years, 5 months ago

Special tunnel boring machines to be deployed for Chennai Metro’s phase II project

The Hindu  

As the city gets ready to witness massive tunnelling operations for the next few years for the 118.9-km phase II project, Chennai Metro Rail Ltd. plans to deploy two specialised machines for handling some portions of the underground work. This is because the transport utility is anticipating some challenging geological conditions and plans to use two special tunnel boring machines. Usually, TBMs could bore nearly 10 metres a day but in the presence of hard rock, even these special TBMs can drill only 3-4 metres a day, officials said. One of the biggest ongoing construction projects in the city is the Chennai Metro Rail work built at a cost of ₹61,843 crore which will link many areas in the north with south and east with west and a substantial portion of this system will be built underground.

History of this topic

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