THREE-DIMENSIONAL ANALYSIS ON SUBSIDENCE OF SHALLOW FOUNDATIONRESTING ON LIQUEFIED GROUND

摘要

The three dimensional method that is presented in this paper is specialized for prediction of permanentdeformation of ground induced by seismic liquefaction. This method is characterized by an assumption oflateral displacement modes that consists of a half and a quarter period of sinusoidal function and themodeling of liquefied subsoil as viscous fluid. A series of example analysis is carried out for a model thatpresumes subsidence of heavy footings into liquefied subsoil to check the feature of the presentedmethod. Since these results, the possibility of that soil solidification to connect the footings reduces thesubsidence of the footings into liquefied ground is suggested. The mitigative effect of sheet pile walls ondeformation of liquefied ground is taken into account, and its mitigative effect is confirmed by the seriesof example analysis.