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| Re: $11 Billion East Side Access project: 11 sinkholes filled, but new sinkholes may form (1304397) | |||
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Re: $11 Billion East Side Access project: 11 sinkholes filled, but new sinkholes may form |
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Posted by SelkirkTMO on Sun Jul 27 22:44:58 2014, in response to Re: $11 Billion East Side Access project: 11 sinkholes filled, but new sinkholes may form, posted by Fisk Ave Jim on Sun Jul 27 22:19:43 2014. Well that's what surprised me about it ... given that they're digging EXACTLY where the PRR did a century earlier, you'd think that the engineering firms behind it would have hit up the library. :)They ran into identical geology in Boston under the MBTA tracks when doing the "big dig" under it, and the solution there was to install shitloads of pipes and literally freeze the ground so that they could dig through the virtual quicksand there. It was an engineering marvel of its time and after all that work and successfully digging the tunnel, it's ending up proving challenges now that also weren't considered as part of the original construction plans. Whoops! http://www.masslive.com/news/index.ssf/2011/08/thawing_soil_leaves_potential.html |
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