某山区斜坡湿软路基滑坡机理及处治措施研究  

Research on the Mechanism and Treatment Measures of Landslide of Wet and Soft Roadbed of Slope in a Mountainous Area

作　　者：唐家辉 郭华江 罗洁[1] Tang Jiahui;Guo Huajiang;Luo jie(Guizhou Transportation Planning Survey&Design Academe Co.,Ltd.,Guiyang 550081,China)

机构地区：[1]贵州省交通规划勘察设计研究院股份有限公司,贵阳市550081

出　　处：《北方交通》2023年第12期26-30,共5页Northern Communications

摘　　要：以实际工程为例,通过工程勘察及工程监测等手段,分析某山区斜坡湿软路基失稳的产生机理,结果表明,该路基失稳的原因一是该地形利于蓄水且地下水丰富,同时坡体覆盖层较厚,且岩土界面发育炭质泥岩软弱层;二是持续性的强降雨造成岩土体的软化,同时前缘河道水体涨落影响了坡体的稳定性,引发了坡体滑动变形并后退式发展,最终形成滑坡。基于此结论,提出了临时排水+钢管桩进行临时加固及综合防排水+抗滑桩进行永久支挡的处治措施。监测结果表明,处治效果良好,可为类似工程提供参考。Taking the actual project as an example,the mechanism of instability of the wet and soft roadbed of slope in a mountainous area is analyzed through the engineering survey and engineering monitoring.The results show that,the first reason for the instability of the roadbed is that the terrain is conducive to water storage and the groundwater is rich.At the same time,the slope has a thick covering layer and a soft layer of carbonaceous mudstone developed at the rock-soil interface;the second is that sustained heavy rainfall causes the softening of the rock and earth mass,while the fluctuation of the water body in the front edge of the river affects the stability of the slope,causing the sliding deformation and backward development of the slope,and ultimately forming a landslide.Based on this conclusion,the treatment measures for temporary drainage+steel pipe piles for temporary reinforcement and comprehensive waterproof and drainage+anti-slip piles for permanent support are put forward.The monitoring results show that,the treatment effect is good,which can provide reference for similar projects.

关 键 词：斜坡湿软路基 滑坡处治 钢管桩 抗滑桩 

分 类 号：U418.5[交通运输工程—道路与铁道工程]