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以自行研制的大型电液伺服粗粒土动静三轴试验仪为工具，对砂砾石、掺砾土两种粗粒土的试验资料作了较深入的研究，提出了供动力分析使用的振动孔隙水压力和残余应变数学模型。考虑初始剪应力影响，归纳了指数函数型表达的超静孔压增长规律和残余剪切变形规律。在三维有效应力有限元法中，运用上述模型对地基土的地震反应进行分析，不但可模拟土体孔压和永久变形在地震过程中的变化情况，而且能够对地震过后一段时间的变化进行模拟。
A large-scale electro-hydraulic servo static and dynamic triaxial testing machine developed by ourselves was used as a tool to make a deep research on the test data of two coarse grained soil, gravel and gravel soil. The vibrational aperture for dynamic analysis Water pressure and residual strain mathematical model. Considering the influence of initial shear stress, the rule of excess pore pressure growth and residual shear deformation of exponential function expression are summarized. In the three-dimensional finite element method of effective stress analysis, the above-mentioned model is used to analyze the seismic response of the foundation soil, which not only can simulate the change of soil pore pressure and permanent deformation during the earthquake, but also can simulate the changes after a certain period of time .