某临江公路路堑沿线高陡边坡稳定性分析及评价

Stability analysis and evaluation of high cut slopes along riverside highway

深路堑高陡边坡的工程地质条件及其地质构造是影响高陡边坡稳定的关键因素。对某临江公路沿线13个高度超过50 m的高陡边坡进行了地质普查,并用玫瑰花图及赤平投影对沿线节理裂隙进行统计分析和稳定性分析评价。13个高陡边坡的破坏模式可分为四种:平面破坏、楔体破坏、圆弧形破坏、倾倒破坏。根据不同稳定程度,将这些高陡边坡划分为:基本稳定、稳定性差和不稳定三类。研究结果为下一步的加固设计和施工奠定了基础。

Engineering geological characteristics and structure of rock mass are the key factors to determining high cut slopes＇ stability. The investigation of engineering geological characteristics is necessary to highway project. Based on the intensive field investigation of the thirteen slopes higher than fifty meters, rosette plot and stereographic projection are used to analyze joints distribution and stability evaluation. The 13 slopes show four different failure mechanisms： plane failure, wedge failure, circular failure and toppling. In terms of stability, the slopes fall into three categories. The results of the stability evaluation provide a solid basis for the reinforcement design of the high cut slopes.