受构造影响的公路滑坡成因分析及治理措施

Cause Analysis and Control Measures of Highway Landslide Affected by Structure

针对眉山环天府新区快速通道位于府君场向斜核部处的边坡滑坡现象进行分析,认为滑坡成因是该边坡地层泥岩发育,且受府君场向斜影响,岩体破碎、完整性差;施工中边坡开挖过陡且受降雨影响等。为确定治理方案,结合土工试验结果和反演结果获得了滑动面参数,进行滑坡稳定性分析及推力计算,最后确定采用适当抬升纵坡后清方的治理方案。

The landslide phenomenon of slope at the syncline core of Fujunchang by fast channel in Tianfu New Area of Meishan is analyzed.It is believed that the cause of landslide is the development of mudstone in the slope stratum,and the rock mass is broken with poor integrity because of syncline effect of Fujunchang.The excavation of the slope is too steep and is affected by the rainfall in the construction.In order to determine the treatment scheme,the sliding surface parameters are achieved according to the geotechnical test result and inversion result.The stability analysis and thrust calculation of the landslide are carried out.Finally,it is determined to use the treatment scheme properly for lifting the longitudinal slope and then clearing the earthwork.