ABSTRACT
Existing simplified methods for assessing soil liquefaction potential and excess pore pressure ( https://www.w3.org/1998/Math/MathML" display="inline"> u e ) during earthquakes rely on laboratory tests of isolated soil samples, often neglecting https://www.w3.org/1998/Math/MathML" display="inline"> u e dissipation and redistribution to adjacent layers. These methods treat liquefiable layers as independent, disregarding boundary conditions even in thin, permeable strata. This study presents an analytical approach to evaluate https://www.w3.org/1998/Math/MathML" display="inline"> u e redistribution effects on layers that might liquefy under undrained conditions and those that wouldn’t liquefy otherwise. Findings reveal that a layer assumed liquefied in undrained conditions may not liquefy when redistribution is considered, while a seemingly non-liquefiable layer may undergo liquefaction due to migrating pore pressures. This is particularly critical for deep foundations, where https://www.w3.org/1998/Math/MathML" display="inline"> u e migration toward pile tips can reduce capacity. A criterion for layer thickness is introduced to predict liquefaction prevention due to redistribution. Finally, a spreadsheet is developed on the proposed analytical procedure to quantify these effects which is validated through centrifuge test results.
