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采用香港科技大学的空心圆柱扭剪仪进行了应力主轴固定单调剪切和应力主轴循环旋转两种不同路径的排水试验。通过应力主轴固定单调剪切试验分析了所制作砂样的初始各向异性特性。在应力主轴循环旋转试验中,控制施加在试样上的3个有效主应力的大小不变,仅应力主轴在0°～180°循环旋转。着重分析了4个应变分量及体应变随应力主轴循环旋转周数的变化关系、剪应力剪应变关系以及所施加的剪应力水平和有效球应力在应力主轴循环旋转过程中对砂土变形特性的影响。
The hollow cylindrical torsional shear instrument of Hong Kong University of Science and Technology was used to carry out the drainage tests of two different paths, the stress spindle fixed monotonic shear and the stress spindle cyclic rotation. The initial anisotropy of sand samples was analyzed by stress-fixed monotonic shear test. In the stress spindle cyclic rotation test, the three effective principal stresses applied to the specimen are controlled in size, and only the stress spindle is rotated at 0 ° -180 °. The relationship between the four strain components and the change of body strain with the number of cycles of stress spindle rotation is analyzed emphatically. The relationship between shear strain and shear stress and the effect of effective ball stress on the deformation characteristics of sand during cyclic rotation of stress spindle influences.