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Characteristics of Wave and Current-Induced Residual Liquefaction in Two-Layered Sandy Seabed

LIU Xiao-Li;ZHOU Jie;CUI Hao-Nan;HE Ying;College of Environmental Science and Engineering,Ocean University of China;Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering;  
Most previous literature has focused on the characteristics of wave and current-induced transient liquefaction in two-layered sandy seabed.However,the transient liquefaction depth is relatively small,which is difficult to reflect the overall characteristics of liquefaction in two-layered sandy seabed.It is essential to analyze the characteristics of residual liquefaction in two-layered sandy seabed under wave and current loadings.Based on the governing equation of residual pore water pressure generation,using software of Comsol Multiphysics,the numerical model was built to analyze the characteristics of residual liquefaction in two-layered sandy seabed under wave and current loadings.Simulation results have revealed that the following current aggravates the liquefaction depth.The influence of relatively larger velocity on seabed liquefaction is indispensable when the residual liquefaction effect is concerned.The permeability coefficients and the relative thickness of upper and lower layers have an important influence on the characteristics of residual liquefaction in two-layered sandy seabed.
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