降雨型浅层土质滑坡失稳机理及治理方案探讨——西南某商建公路边坡脊坡的治理

Study on instability mechanism and protective measures of rainstorm-tiggered shallow earthiness landslides

连续性降雨在我国西南地区较为普遍,连续集中的强降雨渗入道路边坡内,降低岩土体的抗剪强度,降雨诱发的浅层滑坡成为公路工程中的主要工程地质问题之一。西南山区某路堑边坡表层7.0~8.1m厚的黏土,可塑状,施工过程中及运营期出现浅表层滑塌,严重影响高速公路的安全运营。在多次滑塌的基础上对其失稳机理进行研究,结合现场施工条件进行滑坡治理方案设计。

The continuous heavy rainfall is of common occurrence in the southwest of China,Continuous and concentrated heavy rainfall seeps into the shallow surface and interior of the slope,Reducing the shear strength of rock and soil mass,making the shallow landslide induced by it has become one of the main engineering geological problems in highway construction.A road cutting slope in southwest of China with a 7.0~8.1 m thick plastic clay,whose shallow surface collapses in both the construction process and operation period,affecting the safety of highway operation seriously.We study on instability mechanism of it based on its slumps,and then carry out landslide control scheme design considering the construction conditions.