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Unformatted text preview: (i.e. Acr'z = AU), it will also be symmetrical. Therefore, the average percent consolidation (U), and the corresponding time factor (T), at any given time will be the same above and below midheight. The following initial pore pressure distributions are equivalent as shown: I Case 1a I Case 3 Case 4 J)o. ..{,lt I)''';'' ,.,,,. I\:. \. . rJ: 1. T = cyt = cyt (H/N)2 (h/2)2 O1i1i1J1;l;:Jm h = = = S",d,,,,:;e. . 10"".1.;'.:1 ~k.,<f.. Y<it ~'tktl"S{ <.<. ~ IS l"l.ue /.'. ... +tvl",t If! illl. tuoJ Jet./( "JlJ " ... /;JI 7 In summation: if the initial excess pore pressure distribution is symmetrical about the midheight, then the behavior of a layer of height H with double drainage is identical to that of a layer with height = H/2 and single drainage. (This is why we defined the maximum drainage path = H/N.)...
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 Fall '08
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