某高速公路高填路堤滑坡成因及稳定性分析

Analysis on the Causes and Stability of the High-fill Embankment Landslide of an Expressway

山区地形复杂多变,进行路线设计时,洼地、沟谷位置多设计为填方路堤。雨季时,此类地段为地表水汇集处,排水对于公路运营期路堤安全而言至关重要。文章分析了一种由于地表水排水不畅导致路堤破坏的案例,该案例在丘陵山区较为常见。根据路堤后缘裂缝和路堤坡体、坡脚等剪出口裂缝、鼓胀位置推测潜在滑动面,并对各种工况的稳定性进行了定量计算。研究方法可为公路路堤边坡水毁破坏初期的应急抢险提供稳定性分析支持。

The terrain in mountainous area is complex and changeable,and when the route is designed,the location of low-lying land and cheuch is mostly designed as fill embankment.During the rainy season,these areas serve as surface water gathering points,and drainage is critical to the safety of the embankment during the highway operation.The case of embankment failure due to poor surface water drainage is analyzed,which is common in hilly and mountainous areas.The potential sliding surface is estimated according to the cracks at the trailing edge of the embankment,the cracks of embankment slope,slope toe and other shear outlets and bulging position,and the stability of various working conditions is quantitatively calculated.The research method can provide stability analysis support for the emergency rescue in the early stage of water damage of highway embankment slope.