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通过循环应变动三轴试验，研究了饱和砂（粉）土衰化动力特性．首先阐明固结压力对循环累积孔压比的影响，进而建立了循环应变下的累积孔压比归一化关系；为了揭示衰化动变形参数的变化与非衰化动变形参数变化之间的联系，提出了测定衰化动变形参数变化关系的试验与数据处理方法，最后建立了衰化动变形参数的归一化关系．
The dynamic characteristics of the degradation of saturated sand (silty soil) were studied by cyclic strain dynamic triaxial test. Firstly, the influence of consolidation pressure on the cumulative pore-pressure ratio of circulation was expounded, and then the normalized relationship of cumulative pore-pressure ratio under cyclic strain was established. In order to reveal the relationship between the change of dynamic deformation parameter and the non-degradation dynamic deformation parameter In the end, the experiment and data processing methods for determining the variation of dynamic deformation parameters are put forward. Finally, the normalized relationship between the deformation parameters and the dynamic deformation parameters is established.