Development of screening procedure for earthquake induced damage of embankment with considering effect of subsoil liquefaction

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Earthquake induced damage of embankment could be divided into two patterns. One is the damage due to subsoil liquefaction and the other one is damage due to failure of embankment itself due to seismic inertia force. In this study, it is attempted to develop a screening procedure for former type of damages based on the results from dynamic centrifuge model tests and analyses of earthquake caused damage of embankment. It is found from the model test and analyses that the ratio of the thickness of liquefiable layer and not liquefiable layer could be effective indexes for the screening. As the end of this research, a screening procedure was proposed by using the ratio of the thickness of liquefiable layer to the not liquefiable layer, and settlement of embankment to the subsoil as the indexes.