土体标度分布参数与其物理力学性质的关系研究

土体标度分布参数可以客观地表达土体颗粒组成的整体特征,便于建立其与土体物理力学性质之间的定量关系,具有重要的理论意义和实际应用价值。以土体的标度分布理论为基础,结合土体渗透实验和直剪实验,研究了土体标度分布参数与其渗透系数、抗剪强度指标(黏聚力、内摩擦角)的关系,结果表明:土体渗透系数K与标度分布参数μ呈负对数关系,与特征粒径D_c没有明确的相关关系;土体的黏聚力(c)随标度分布参数μ的增加而增大,土体的内摩擦角(φ)随特征粒径D_c的增大而减小;D_c-c、μ-φ之间的拟合关系较差。

Study on the relationship between the scale distribution parameters of soil and its physical and mechanical properties

The soil scale distribution parameters represent the overall characteristics of the soil particle size distribution objectively and make it easy to establish a quantitative relationship between them and the physical and mechanical properties of the soil,which has important theoretical significance and practical application value.Based on the scale distribution theory of soil,combined soil penetration experiment and shear strength tests,the relationship between soil surface distribution parameters and its permeability coefficient,cohesion and internal friction angle was studied.The results show that there is a negative logarithm relationship between the soil permeability coefficient K and the scale distribution parameter μ,and there is no clear correlation with the characteristic particle size D.The cohesion(c)of the soil increases with the increase of the scale distribution parameterμ,while the internal friction angle(φ)of the soil decreases as the characteristic particle size D_c increases.The fitting relationship between D_c-c andμ-φis poor.