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| Re: Expansion of single track Empire Connection to double track? (1468268) | |||
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Re: Expansion of single track Empire Connection to double track? |
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Posted by Bill West on Mon Mar 5 04:06:48 2018, in response to Expansion of single track Empire Connection to double track?, posted by NIMBYkiller on Mon Mar 5 01:17:19 2018. When, in anticipation of the LIRR West Side yard, the old New York Central yards were levelled in the '80s a 3/4 circle trench was excavated about 20' into the ground. That's what the Empire tunnel was built in, cast in place and then backfilled on the sides. The underside of it sits on pads on the top of the Hudson tunnels and the WSY subgrade sits on top of it. So if you had a practical construction method for working that close under the WSY you could look into building inside or outside of the existing circle. Inside raises questions of radius and outside raise questions of clearance to the trench Amtrak built for our uncertain future Hudson tunnels. The Hudson Yards building foundations you mentioned would remain a question in both cases.Bill |
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