211_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

211_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 - ~ ~...

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Sl37 Total vs. Effective Stress Stability Analysis for Saturated Clays a Embankment Constructed on Clay: look at stresses developed on failure circle at pI. P P Time u ~ 'Ywh Height of Fill Time 'td, shear strength mobilized on critical surface through point P I au ~ fifJ. > 0 (+) (au ~ 0 as aa'. ~ aa.) I I I ~::-:-t::-::-:-:="=,,=:.n~o~te;.;t~h~a::tL1~u~u~nk~n~o~w~n~ _ -------+--------- ------ Undrained . . (short time) Consolidation
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Unformatted text preview: ~ ~ ... E .2' QJ :I: u:: :l e :l '" '" QJ ~ ... Q. Q) ... Q. a', ~ 0'0 + fia 't increases as a'. increases Time Critical Time tt (EOC), has minimum FS ~ ('t I 'td) ( .,lct(,rl l / l.' '-)U-J. ... kl S~Jj ( S ~lDf J t-t. . . '.I) ""'"" 1 1 S/J " ..... (oc. . Time t1 ~ end of construction t2 = end of pore water pressure dissipation...
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