平行于水平面表面渗流对生态边坡中客土稳定性影响研究

设定平行于水平面表面渗流情况下客土破坏模式为一条沿平面网上表面的平行于原边坡坡面的直线滑动面.根据此破坏模式,采用无限坡模型进行客土的稳定性分析,推导出有地震、平行于水平面表面渗流作用下的客土稳定厚度的通式.通过对通式中参数取值的讨论,给出了各种情况下的客土稳定设计图表.利用平行于水平面表面渗流和平行于坡面表面渗流情况下的客土稳定设计图表,进行了两种情况下客土稳定性的对比.结果表明,客土失稳厚度相同时,平行于水平面表面渗流比平行于坡面表面渗流时的客土稳定性显著降低,且客土失稳厚度越小,客土稳定性的降低更为显著.

Study of effects of surface seepage parallel to horizontal surface on stability of borrowed soil in ecological slope

Supposing that the failure mode of borrowed soil with surface seepage parallel to horizontal surface is a translational sliding surface parallel to the original sloped surface along the upper surface of plane nets. Based on this failure model，the stability analysis of the soil is carried out; and then a general equation on stability thickness of the soil under earthquake and surface seepage parallel to horizontal surface is given. Stability charts for the soil are obtained after discussion on parameters of the equation. Using the charts with surface seepage parallel to horizontal surface and with surface seepage parallel to sloped surface, the stability of the soil is compared. The result shows the stability of the soil with surface seepage parallel to horizontal surface is remarkably reduced than that with surface seepage parallel to sloped surface, and reduced degree is inversely proportional to instability thickness of the soil.