Abstract: According to the dates and wreck samples that were obtained from triaxial test and CBR test, this paper analyses the deformation characteristics of grade sand-gravel base course under cyclic loading .At the same time from the view of energy put out that the deformation of sand-gravel base course can assumed the two fellowing:one is elasticity deformation, the other is similarity elasticity deformation.This ansys is very useful when consider the deformation of sand-gravel base course

Key words: sand gravel, stability , dilatancy deformation, granular material

摘要： 根据三轴试验及抗压强度试验所得的数据和试验后试样破坏情况,分析了级配砂砾石在反复荷载作用下的变形特性,并从能量势的角度提出砂砾石基层的塑性变形可分为永久变形和似弹性变形,这一分析对考虑基层的变形有很大意义

关键词: 砂砾石, 稳定性, 剪胀剪缩, 散粒体