陕南某公路边坡稳定性及治理措施分析

Analysis of Slope Stability and Treatment Measures for a Highway in Southern Shaanxi

陕南地区某典型三级边坡在治理施工时发生了大面积垮塌,开挖后未及时防护是导致边坡失稳的直接原因,秋季持续强降雨是促进边坡垮塌的间接原因。使用强度折减法并运用数值软件计算分析,结果表明边坡卸载并在一级平台使用单锚点预应力锚索抗滑桩加固的治理效果最好。综合分析采用分级刷坡卸载+单锚点预应力锚索抗滑桩+综合排水系统+绿化措施的治理方案,并对边坡开展表面位移、深层位移、地下水位等实时监测和视频监控,可有效监控边坡稳定性,确保公路运营安全。研究成果对类似边坡治理有一定借鉴作用。

A typical third level slope in the southern Shaanxi region experienced large-scale collapse during treatment construction.Failure to timely protect after excavation was the direct cause of slope instability,while continuous heavy rainfall in autumn was the indirect cause of slope collapse.The strength reduction method and numerical software were used for calculation and analysis.The results show that the slope unloading and the use of single anchor point prestressed anchor cable anti-slip pile reinforcement at the first level platform has the best treatment effect.The comprehensive analysis adopts a treatment plan of graded slope unloading,single anchor point prestressed anchor cable anti-skid pile,comprehensive drainage system,and greening measures.Real time monitoring of surface displacement,deep displacement,groundwater level,video monitoring,and other aspects of the slope can effectively monitor slope stability and ensure highway operation safety.The research results have a certain reference value for similar slope treatment.