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本文采用PFC2D来建立能够反映粘性土微观结构的模型,对不同方向的切样分别进行剪切试验,得到不同方向上剪切的应力应变曲线、剪应变-体应变曲线,求得不同方向上的弹性模量、泊松比、体积模量和剪切模量4个参数,得到其变化规律。粘性土各个方向上剪切强度峰值强度基本沿竖直方向对称分布,呈现出由竖直方向到水平方向剪切的峰值强度由大到小的变化规律。
In this paper, PFC2D is used to establish a model that can reflect the microstructure of cohesive soil. Shear tests are performed on the cuttings in different directions to obtain the shear stress-strain curves and shear strain-body strain curves in different directions, Elastic modulus, Poisson’s ratio, bulk modulus and shear modulus of four parameters, to obtain its variation. The peak shear strength in all directions of clayey soil distributes symmetrically along the vertical direction, and the variation of the peak shear strength from vertical direction to horizontal direction changes from large to small.