On the base of loading properties of hollow cylinder apparatus, loading method to simulating the principal stress axes rotation in laboratory tests is given.
以此为基础，结合空心圆柱仪的加载特点，给出了室内模拟主应力轴旋转的加载方法。
The time-history curve of stress, stress path and curves of the principal stress axes rotation of soil element under and beside the load moving line are presented.
给出荷载移动线正下方和荷载移动线外土单元应力的时程曲线、应力路径、主应力轴方向变化曲线。
The pore water pressure under positive rotation of principal stress axes is smaller than that under inverse rotation.
主应力轴正向旋转较逆向旋转产生的孔压小；
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