论文部分内容阅读
为了分析渗透系数各向异性对边坡稳定性的影响,该文基于饱和-非饱和渗流计算方法首先计算并分析了渗透系数的各向异性对边坡渗流场的影响,其次结合非饱和抗剪强度理论得到了设计方案下边坡安全系数的变化规律。研究表明:在土体水平向饱和渗透系数一定时:(1)相同雨型条件下,渗透系数各向异性比越大,雨水的入渗深度越小,孔隙水压力增量越小。(2)在相同渗透系数各向异性比条件下,降雨雨型决定了孔隙水压力增大的快慢和幅度。(3)降雨雨型决定了安全系数开始降低的时间,而相同雨型条件下渗透系数各向异性比则控制了安全系数降低的幅度。
In order to analyze the influence of anisotropy of permeability coefficient on slope stability, the paper first calculates and analyzes the effect of anisotropy of permeability coefficient on seepage field of slope based on the calculation method of saturated-unsaturated seepage. Secondly, The strength theory has obtained the change rule of the slope safety factor under the design scheme. The results show that when the soil horizontal saturation saturation coefficient is constant: (1) Under the same rainfall conditions, the greater the anisotropic permeability coefficient, the smaller the infiltration depth of rainwater, and the smaller the increment of pore water pressure. (2) Under the same permeability coefficient anisotropy ratio, rainfall type determines the speed and magnitude of pore water pressure increase. (3) Rainfall type determines the time when the safety factor begins to decrease, while the permeability coefficient anisotropy ratio under the same rain type condition controls the magnitude of safety factor reduction.