某高速公路路堑边坡稳定性及处治措施研究  

Study on the Stability and Treatment Measures of a Highway Cutting Slope

作　　者：李帆 郑家毓 LI Fan;ZHENG Jiayu(Minnan University of Science and Technology,Fujian Quanzhou 362700,China;Guangdong Nanyue Transportation Investment and Construction Co.,LTD.Longlian Highway Management Office,Guangzhou 510000,China)

机构地区：[1]闽南理工学院,福建泉州362700 [2]广东省南粤交通龙连高速公路管理处,广州510000

出　　处：《交通工程》2025年第1期93-98,共6页Journal of Transportation Engineering

摘　　要：以某高速公路K301+200~+373右侧路堑边坡为研究对象,通过现场踏勘及预应力锚索监测发现,该边坡存在多处不同程度的开裂、坡脚鼓胀剪出及局部滑塌,且当前锚索平均预应力损失达73.30%。分析该边坡病害成因主要为岩体岩性较差,持续集中强降雨后大量雨水渗透,使岩体软化、抗剪强度降低,同时原加固措施不足,导致坡体变形。使用Geo5软件进行数值模拟计算分析,结果表明该边坡整体处于欠稳定状态,局部区段处于不稳定状态;随着边坡变形的持续发展,存在锚索失效的风险。采取对已滑塌区进行加固、对潜在危险区进行预加固及完善排水设施的综合治理措施,处治效果良好。Taking K301+200~+373 right side cutting slope of an expressway as the research object,through site survey and monitoring of prestressed anchor cable,it is found that the slope has a number of different degrees of cracking,foot expansion shear and local slump,and the current average prestressed loss of anchor cable is 73.30%.It is analyzed that the cause of the slope disease is mainly poor rock lithology,and a large amount of rainwater penetrates after continuous concentrated heavy rainfall,which softens rock mass and reduces shear strength.At the same time,the original reinforcement measures are insufficient,resulting in slope deformation.The Geo5 software is used for numerical simulation and analysis,and the results show that the slope is in the unstable state as a whole,and the local section is in the unstable state.With the continuous development of slope deformation,there is a risk of anchor cable failure.The comprehensive treatment measures of strengthening the already sliding area,pre-strengthening the potentially dangerous area and improving the drainage facilities are adopted,and the treatment effect is good.

关 键 词：路堑边坡 病害成因 数值模拟 稳定性分析 处治措施 

分 类 号：U417[交通运输工程—道路与铁道工程]