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:: News ::
 | Post date: 2016/05/29 | 
Complex soil makes metro tunneling slow.
 AWT IMAGE
unnel boring machines can barely dig 2.5 to 3 metre a day along that stretch, slowing down work in the entire line between Washermenpet and Egmore metro stations. Officials are advice to do the work slowly due to complex soil and which are otherwise capable of boring long stretches in a day. “We have dug as much as 54 meter at one go,” said an official. Tunneling work in the 300-metre stretch got underway in October 2015. A senior metro rail official said the stretch has slowed down their tunneling work, as it has mixed strata with rock in the bottom and loose soil on top, a combination they have not seen during excavation for tunneling in other parts of the city. The corridor will have a total of 14.3 km underground including 11 stations in Washermenpet. We have no choice but to work slowly and carefully. We still have about eight percent of work to complete there,” said the official.

May 15, 2016
Link:
http://sathiyamnews.com/districts/chennai/complex-soil-makes-metro-tunneling-slow
  
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