Sloping soil layer will be liquefied and yield large deformation under earthquake vibration. Based on finite element theory

a numerical method is studied for seismic liquefaction induced large deformation of gentle inclined soil layer. In this method

Liquefaction analysis is performed by two-dimensional dynamic effective stress finite element method

and in each time segment of the analysis

modulus of soil elements are achieved considering soil liquefaction and vibrated soften; then large deformation of soil layer is calculated by nonlinear static method in the end of each time segment

horizontal and vertical displacements are acquired in any depth of soil layer at last. By examples

the influences on large deformation are studied with different earthquake accelerations and slope angle. Compared with the results of other researches

the validity of the new method is confirmed; and it is applicable to solutions of earthquake geological hazards evaluating in engineering field.