基于室内试验和离散元模拟的砂土强度研究

摘要

Across the indoor triaxial test and two-dimensional discrete element numerical simulation,we study the effect of sand particle arrangement on the shear strength.We discuss the influence of structural strength of sand arrangement through the indoor triaxial test and two-dimensional discrete element numerical simulation by preparing the four different arrangement of the same three-axis sample under the same relative density and the two-dimensional discrete element values in the same case.The results show that the overall strength of the sand has a great relationship with the arrangement of samples,and the internal friction angles of different arrangement methods are different.These results will be more favorable to guide the research of unsaturated soil properties.%通过室内三轴试验和二维离散元数值模拟的方法,研究了砂土颗粒排列对其剪切强度的影响.通过制备同一相对密实度下的四种不同排列方式的室内三轴试样和相同情况下的二维离散元数值剪切试样,分别进行室内试验和二维离散元数值模拟,探讨了土体结构性中的排列方式对砂土强度的影响.结果表明,砂土的整体强度与试样的排列方式有很大关系,不同的排列方式所对应的内摩擦角是不同的,这些成果将更有利的指导非饱和土特性的研究.