Based on the engineering background of Xinghai station of metro line 1in Suzhou city

considering the nonlinear dynamic interaction of soil-subway station structure

the following is analyzed mainly in this article:the dynamic separation and slip effect of the interface between soil and underground structure

the response amplitude and the distribution law of dynamic earth pressure and dynamic friction and the influence of dynamic contact effect on the dynamic response of subway station structure.The results show that soil and subway station structure are found separated on the top of the side wall and relatively sliped on the structure roof;meanwhile

the general dynamic response of underground structure is smaller when considering the dynamic contact effect.The distribution law and coefficient of dynamic earth pressure of the side wall are given in this article.The response amplitude and the distribution law of dynamic earth pressure of the structure roof are also given.These analysis results have direct reference value and guiding significance for further understanding the dynamic contact effect of soil-underground structure and its effect on dynamic response.