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基于有限元理论分析了土壤在承受垂直和水平复合载荷下的变形规律。首先通过平板沉陷试验分析确定土壤在垂直载荷作用下的载荷-变形关系,接着考虑水平载荷的影响通过剪切试验确定土壤的复合载荷-变形关系。研究结果表明水平载荷会造成土壤的滑动沉陷,水平剪切位移与土壤的滑动沉陷量之间呈线性关系。对影响滑动沉陷量的因素进行了分析,其中影响比较大的因素是垂直方向的载荷以及土壤的塑性参数黏聚力和摩擦角,而土壤的弹性参数弹性模量和泊松比对滑动沉陷量的影响比较小。
Based on the finite element theory, the deformation of soils subjected to vertical and horizontal composite loads was analyzed. Firstly, the load-deformation relationship of soils under vertical load is determined by plate subsidence test. Then the load-deformation relationship of soil is determined by shear test considering the effect of horizontal load. The results show that the horizontal load can cause the soil to slide and sink, and the horizontal shear displacement has a linear relationship with the soil sliding settlement. The factors influencing the sliding settlement were analyzed. Among them, the most influential factors were vertical load and plastic cohesion and friction angle of soil, while elastic modulus and Poisson’s ratio of soil had significant influence on sliding settlement The impact is relatively small.