Summarization of study on calculation method of seismic earth pressure in retaining wall

According to the seismic earth pressure calculation method applied in China present regulations was in a statics category, a dynamic effect of the seismic wave was ignored. In order to further understand the back earth pressure condition of the retaining wall under the actual seismic effect, based on the proposed static, proposed dynamic and dynamic analysis idea, the paper summarized the study status and progress of the seismic earth pressure calculation method, certainly including the proposed static method, proposed dynamic method, elastic wave method and numerical method. The advantage and disadvantage of each method was stated and the existed problem and late development tendency of each method was pointed out. The results showed that due to the complexity of the seismic effect, thus the seismic earth pressure calculation not only should consider the static factors, such as the backfilled earth property, back mode and strata distribution and should consider the dynamic factors, such as the surface loading and seismic activity features. The difference of the factor considered would make each method with a certain limit. There were four aspect problems to be solved for the calculation method of different seismic earth pressure. Firstly，the proposed static method should consider the backfilled earth parameters and the dynamic load influences and the rational seismic parameters should be provided. Secondly，to consider the influences of the Rayleigh wave, a more rational seismic earth pressure calculation formula of the proposed dynamic method should be provided. Thirdly，the suitability of the elastic wave method under the high strain load should be improved. Finally，an access to have numerical methods, rational parameters could improve the proposed accuracy of the elastic and nonlinear constitutive model in the numerical methods.