Tunnels subject to negative pressure.
Tunnels subject to negative pressure.
(OP)
I've heard that in New York they are pumping out water from the tunnels after hurricane sandy. There is concern they will create negative pressure and this cause problems. Can anyone expand on what these problems are? Is it just a concern about spalling concrete because of corrosion in the damp environment of a tunnel?
M.S. Structural Engineering
Licensed Structural Engineer and Licensed Professional Engineer (Illinois)






RE: Tunnels subject to negative pressure.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Tunnels subject to negative pressure.
Anyhow, just for discussion, if they did create negative pressure, is there much risk of a tunnel section collapsing inward, or is the risk more to spalling concrete, damaged seals between tunnel sections, etc?
M.S. Structural Engineering
Licensed Structural Engineer and Licensed Professional Engineer (Illinois)
RE: Tunnels subject to negative pressure.
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Tunnels subject to negative pressure.
RE: Tunnels subject to negative pressure.
http://www.nytimes.com/interactive/2012/10/30/nyre...
Mike Halloran
Pembroke Pines, FL, USA
RE: Tunnels subject to negative pressure.
http://www.mta.info/sites/default/files/pdf/Subway...
Mike Halloran
Pembroke Pines, FL, USA
RE: Tunnels subject to negative pressure.
Second one was this:
http://www.hydroworld.com/articles/print/volume-15...
... which deals with vortex formation at water intake structures, not really related to dewatering tunnels.
Mike Halloran
Pembroke Pines, FL, USA
RE: Tunnels subject to negative pressure.
http://www.quora.com/Civil-Engineering/What-does-i...
Mike Halloran
Pembroke Pines, FL, USA
RE: Tunnels subject to negative pressure.
Extrapolating this to New York , its areas of saturated localised geology you have to worry about , not the tunnel itself.