粘土与结构接触界面剪切特性的试验研究

对DSJ-2型电动四联等应变直剪仪进行改装，在改装后的剪切仪器上进行了粘土自身、粘土与光滑及粗糙混凝土、粘土与平行及垂直纹理木材4个含水率共80个试样的剪切试验。结果得到了不同含水率不同正应力下土与不同结构接触界面的剪切应力应变曲线。研究结果表明，粘土与结构接触界面的抗剪强度、摩擦角、粘聚力等力学参数与土体含水率、接触材料类型及接触材料粗糙度密切相关。

Experimental Research on the Shear Characteristics of Interface between Clay and Structure

80 soil-structure contact surface specimen tests are conducted by a refitted DSJ-2 electric quadruple equal stress direct shear device, which involve five contact types such as soil-soil，soil-smooth concrete，soil-rough concrete，soil-parallel veined wood，soil-vertical veined wood.As a result, shearing stress-strain curves for the contact interface between soil and different structures at various moistures and normal stresses are obtained.The result shows that the mechanical properties of soil-structure contact surface such as shear strength，friction angle and cohesion force are closely related with soil moisture, structure material and structure roughness.