摘要
重庆某高速公路路堑边坡受强降雨影响,在开挖过程中坡面及坡顶地表出现开裂、坡脚局部有流态泥土和地下水渗出,诱发路堑滑坡。为此,从滑坡区地形地貌、地质构造、地层岩性、水文地质及滑坡形态等方面对滑坡成因进行了分析,采用传递系数法对边坡天然工况和极端暴雨工况条件下的稳定性进行了评价。基于滑坡易损性分析,以安全可靠、经济有效为原则提出了综合处治措施。该高速公路已通车运行多年,处治后的边坡安全稳定,其处治措施可为类似工程提供参考。
The cutting slope of a expressway in Chongqing was affected by heavy rainfall,cracks appeared on the slope surface and on the top of the slope during the excavation process,fluid soil and groundwater outflow at the foot of the slope,which induced the cutting landslide.For this reason,the causes of landslide were analyzed from the aspects of topography,geological structure,stratum lithology,hydrogeology and landslide morphology in the landslide area,the stability of slope under natural conditions and extreme rainstorm conditions were analyzed and evaluated by means of the transfer coefficient method.Based on the analysis of landslide vulnerability,the comprehensive treatment measures were put forward for the principle of safety,reliability and economic efficiency.The expressway has been open to traffic for many years,and the treated landslide is safe and stable.Its treatment measures can provide reference for similar projects.
作者
徐生明
冯玉涛
XU Shengming;FENG Yutao(Chongqing Communications Planning Survey & Design Institute,Chongqing 401121)
出处
《公路交通技术》
2019年第3期8-12,19,共6页
Technology of Highway and Transport
关键词
路堑边坡
滑坡
成因分析
稳定性评价
处治措施
cutting slope
landslide
cause analysis
stability evaluation
treatment measures
