Abstract：Liquefaction in saturated sandy soil can also be caused by explosive loadings. Compared with the investigation of seismic liquefaction，the study of explosive liquefaction is still in testing and its theoretic study is also primary and obvious. It is still unreported about the study of explosive liquefaction using effective stress models all over the world. In fact，because of its few parameters，sample and practical，the effective stress models are widely used. According to effective stress dynamic analysis method，Byrne¢s volume strain model is used to simulate the effective stress analysis of saturated soil under single-point，two-point and multi-point explosion seismic waves，respectively，with FLAC code which is a two-dimensional explicit program. Three kinds of fields are considered，such as the level，little-obliquity，and slope ground. The results of numerical simulation indicate that it is simple and practical to analyze liquefaction using volume strain model with few parameters，and the characteristics of saturated sandy soil are different with fields. For some depths of calculated soil，it has little effect on liquefaction with small angle while its effect can not be ignored after exceeding a certain degree. So the characteristic of liquefaction in saturated sandy soil is widely varied with different obliquity while the other conditions are the same. The graphs of isoline states after simulating can be presented with the effective stress and pore water pressure in dams under dynamic loadings while the effective stress analysis of dams are performed under explosion loadings.
