肃祁路白泉门滑坡稳定性分析及工程建议

G213线肃祁路通过白泉门滑坡前缘,现滑坡变形严重,威胁行车安全,该文对滑坡稳定性进行分析,为公路病害资料提供依据。通过对滑坡地貌特征、裂缝分布情况的研究,将滑坡分为前后两级,根据变形情况分析,滑坡在地震工况下发生失稳滑动的可能性较大。随后基于定性分析,反算滑面力学指标,并根据规范稳定性系数要求,计算需要设防的最大水平推力为2 983.4 kN/m。基于道路指标及走廊现状分析道路治理方案,该处无绕避条件,需对滑坡体进行治理,宜采取抗滑及排水相结合的治理方式。

Suqi Road of Line G213 passes through the leading edge of Baiquanmen landslide.At present the landslide deforms seriously and threatens traffic safety.This paper analyzes the stability of the landslide and provides a basis for highway disease data.Through the study of the geomorphological features and crack distribution of the landslide,the landslide is divided into two stages.According to the analysis of deformation,the landslide is more likely to occur unstable sliding under the earthquake condition.Then,based on the qualitative analysis,the mechanical index of the sliding surface is inversely calculated,and according to the requirement of the stability coefficient of the code,the maximum horizontal thrust that needs to be fortified is2 983.4 kN/m.Based on the analysis of the road treatment scheme based on the road index and the present situation of the corridor,there is no bypass condition,so the landslide body needs to be treated,and the combination of anti-slide and drainage should be adopted.