基于深部位移曲线特征的公路边坡稳定性评价方法研究

Evaluation Method of Highway Slope Stability based on Deep Displacement Curve Characteristics

以云南武易高速公路边坡为例,通过统计分析分别建立3类边坡的典型地质概化模型,将极限平衡法、有限元数值模拟方法及深部位移曲线类型分析相结合,针对不同工况条件下的边坡稳定性进行综合评价,研究边坡深部位移曲线特征及其与边坡稳定性之间的关系,初步建立了基于深部位移曲线特征的边坡稳定判据。进一步以此作为对我国现行规范中的边坡稳定评价方法的补充,针对滇中地区的典型边坡监测治理案例开展应用研究。分析表明,相关评价方法简单易行、方便操作,对滇中地区不同类型的公路边坡稳定评价均有着较好的适用性,具备在滇中地区进行推广应用的基础。

Taking the slope of Yunnan Wuding-Yimen Expressway as an example,the typical geologic generalization models of three types of slopes are established by statistical analysis.The limit equilibrium method,the finite element numerical simulation method and the deep displacement curve type analysis are combined to evaluate the slope stability under different working conditions.The relationship between the characteristic curve of the deep displacement of slope and slope stability is studied,the slope stability criterion is initially established based on the characteristics of deep displacement curve,which is further taken as a supplement to the evaluation method of slope stability in the current standard of China.Studies of typical slope monitoring and managementin central Yunnan Province show that the relevant evaluation method is simple and easy to operate.It has a good applicability to the different types of highway slope stability evaluation in the middle reaches of Yunnan Province,and has the foundation of popularizing and applying in the middle Yunnan area.