含砂量对黏土与结构接触面剪切性质的影响

通过土体内部、土与钢以及土与混凝土的剪切试验,研究分析了土体含砂量对抗剪强度、摩擦角和黏聚力的影响。结果表明:土体内部、土与结构接触面的抗剪强度和摩擦角均随含砂量的增大而增大;土体内部的黏聚力随着含砂量的增大而减小,而土与结构接触面的黏聚力却随着含砂量的增大而增大。含砂量对土体的内摩擦角影响较大,而对土与钢和土与混凝土这两种类型的接触面影响较小。在试验参数范围内,对于任意含砂量和垂直应力,土体内部的抗剪强度、内摩擦角和黏聚力均大于土与钢和土与混凝土之间的抗剪强度、摩擦角和黏聚力。

Influence of Sand Content on Shearing Behavior of Clay-structure Interface

The shearing tests on internal soil mass, soil-steel, and soil-cement were carried out to explore the influence of sand content of soil mass on shear strength, friction angle and cohesion.The results show that the shear strength and friction angle inside the soil mass and on the soil-structure interface increase with the sand content, and as the sand content increases, the cohesion inside the soil mass reduces and that on the soil-structure interface enhances.The sand content has major impact on the internal friction angle of the soil mass, but minor effect on the interface between soil and steel or soil and cement.Within the range of the test parameters, and for any sand content and vertical stress, the shear strength, internal friction angle and cohesion inside the soil mass are larger than those on the interface between soil and steel or soil and cement.