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| Re: The Most Awful Transit Center in America Could Get Unimaginably Worse (1461995) | |||
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Re: The Most Awful Transit Center in America Could Get Unimaginably Worse |
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Posted by sand box john on Fri Jan 12 19:55:25 2018, in response to Re: The Most Awful Transit Center in America Could Get Unimaginably Worse, posted by Fisk Ave Jim on Fri Jan 12 17:47:07 2018. Are the Hudson river & Steinway tunnels bored thru solid rock? It Seems that the NATM method is designed to work best when going thru solid rock. IIRC both tunnels only have sections that go thru bedrock, the rest thru muck thus might not a viable tunneling method for a rebuild.NATM can be used in any conditions, The WMATA Tysons Corner tunnels were through sedimentary sands and gravel. John in the sand box of Maryland's eastern shore. |
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