筋土接触面直剪试验研究

摘要

为研究筋材与砂土接触面剪切特性,在改造的直剪仪上进行了筋材与砂土界面的直剪试验.结果表明:筋土接触面摩擦关系曲线符合摩尔-库仑强度准则.在本次试验的含水率范围内,筋土接触面的粘聚力随着含水率的增加而增加,摩擦角随着含水率的增加而减小.含水率为4％,筋土接触面的粘聚力和摩擦角随着砂土干密度的增大而增大.%The shearing characteristics of contact surface between reinforcement and sand was studied by the direct shear test on a modified direct shear apparatus. It was showed that Mohr-Coulomb strength criterion can be used to describe the frictional contact relationship. Within the water content range of this test, the cohesion of the contact surface increases and the friction angle of the contact surface decreases with the increase of water content. The cohesion and friction angle of the contact surface increase when the dry density of the soil increases at water content of 4%.