某高速公路填挖交界路基滑坡机理分析及处治措施  

Mechanism Analysis and Treatment Measures of Landslide at the Filling and Excavation Intersection Roadbed of a Certain Expressway

作　　者：刘亚军 孙昊 夏自卿 LIU Yajun;SUN Hao;XIA Ziqing(Henan Provincial Communications Planning&Design Institute Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]河南省交通规划设计研究院股份有限公司,河南郑州450000

出　　处：《河南科技》2024年第9期74-77,共4页Henan Science and Technology

摘　　要：【目的】高速公路填挖交界处路基滑坡较为常见,且严重威胁着高速公路的行车安全,因此查明该种病害的作用机理并有针对性地进行处治设计有重要意义。【方法】以某高速公路填挖交界路基滑坡为研究对象,运用钻探及室内试验等方法,分析该路基滑坡的形成机理,基于传递系数法对滑坡进行稳定性计算,并对滑坡整体稳定性进行评价。【结果】结果显示,该路基滑坡处于欠稳定状态。由于降雨入渗引起路基土体强度变低,填土的黏聚力和内摩擦角均较粉质黏土偏小,最终导致路面不均匀沉降。【结论】使用综合处治措施后,经施工检验设计方案达到处治效果,并为后续类似工况提供参考。[Purposes]Roadbed landslides at the intersection of filling and excavation on highways are common and pose a serious threat to the driving safety of highways.Therefore,it is of great significance to identify the mechanism of this disease and carry out targeted treatment design.[Methods]This article takes a roadbed landslide at the intersection of filling and excavation on a certain highway as the re⁃search object.By using exploration methods such as drilling and indoor testing,the formation mechanism of the roadbed landslide is analyzed.Based on the transfer coefficient method,the stability of the land⁃slide is calculated,and the overall stability of the landslide is evaluated.[Findings]The results show that the roadbed landslide is in an unstable state.Analysis shows that due to rainfall infiltration,the strength of the roadbed soil decreases,and the cohesion and internal friction angle of the filled soil are smaller than those of the silty clay,ultimately leading to uneven settlement of the road surface.[Conclu⁃sions]After using comprehensive treatment measures,the construction inspection design scheme achieved the treatment effect and provided reference for similar working conditions in the future.

关 键 词：填挖交界 路基 滑坡 稳定性评价 处治措施 

分 类 号：U416.1[交通运输工程—道路与铁道工程]