Earthquake Induced Settlement
Earthquake Induced Settlement
(OP)
Hi all,
I am working on a reclamation/cover design for a (uranium) tailings impoundment. Following our initial design, we have recieved comments from the regulatory agency (and their consultant). One of the comments requests that we perform a seismic settlment analysis on the (mostly) dewatered tailings. Does anyone know of a fairly recent reference that addresses how to perform such an analysis? I am aware of the 1987 Tokimatsu and Seed method, but fear that it is too dated and will result in another round of comments requesting a more current method.
Thanks in advance for any help.
I am working on a reclamation/cover design for a (uranium) tailings impoundment. Following our initial design, we have recieved comments from the regulatory agency (and their consultant). One of the comments requests that we perform a seismic settlment analysis on the (mostly) dewatered tailings. Does anyone know of a fairly recent reference that addresses how to perform such an analysis? I am aware of the 1987 Tokimatsu and Seed method, but fear that it is too dated and will result in another round of comments requesting a more current method.
Thanks in advance for any help.





RE: Earthquake Induced Settlement
http://www.eeri.org/products-page/monographs/soil-...
Or you may just use this software: http://www.soilstructure.com/liquefactionsoftware....
RE: Earthquake Induced Settlement
If there are significant thicknesses of material that is still saturated, expect a few percent volumetric strain, as indicated by Tokimatsu and Seed or Ishihara and Yoshimine. (Refer to the EERI monograph that FixedEarth mentions.) Tokimatsu and Seed does reasonably well, and I'm not sure any other method is going to give an answer that is a whole lot more believable.
On the other hand, unless the whole impoundment is pretty flat, settlement due to shear strains may come out a whole lot worse than what's caused by volumetric strain. Be sure you're looking at the whole problem, or at the right problem.
Regards,
DRG