公路边坡稳定分析及监测预警研究

Analysis of Highway Slope Stability and Research on Monitoring and Early Warning

为了提高公路边坡建设水平,总结了边坡可能的破坏模式及影响稳定性的因素。随后分析了定性分析法及简化毕肖普法、不平衡推力法、有限元法等定量分析方法在公路边坡安全系数计算中的具体应用,并以某高速公路边坡为研究对象,计算了不同分析方法下的安全系数。最后,利用三维激光扫描技术,对边坡在施工期间的水平位移进行监测。研究成果表明:公路边坡稳定性主要受地层岩性、边坡几何尺寸、水、地震、边坡开挖等因素影响,安全系数可用极限平衡法和有限元法计算。同时,为了保证边坡在施工期间的安全性,可动态监测其水平位移。

In order to improve the construction level of highway slopes,the possible failure modes and factors affecting stability of slopes were summarized.Subsequently,the specific applications of qualitative analysis method,simplified Bishop method,unbalanced thrust method,finite element method and other quantitative analysis methods in the calculation of safety factors of highway slopes were analyzed.A certain highway slope was taken as the research object and the safety factors under different analysis methods were calculated.Finally,three-dimensional laser scanning technology is used to monitor the horizontal displacement of the slope during construction.The research results indicate that the stability of highway slopes is mainly affected by factors such as geological lithology,slope geometry,water,earthquake,and slope excavation.The safety factor can be calculated using limit equilibrium method and finite element method.At the same time,in order to ensure the safety of the slope during construction,its horizontal displacement can be dynamically monitored.