高填方路堤边坡稳定性分析方法及控制措施研究

Research on Analysis Methods and Control Measures of High Fill Embankment Slope Stability

公路路堤边坡的设计是保障工程质量的关键因素,不仅对路基本体的稳定起到重要控制作用,对路面结构功能的正常发挥及工程造价等也具有重要意义。目前采用的路堤边坡稳定性分析方法基本可分为2大类:一是科研中应用较多的数值法,通过建立路堤土体的本构模型,结合试验求取土体的物理力学参数,再设置边界条件应用有限单元法求出路基内各点的应力应变关系,通过理论解析法判定边坡的稳定性;二是工程中应用较多的,不过多考虑土体本身特性,将边坡滑动土体看成刚体,整体沿平面或曲面产生滑动破坏,如极限平衡法。要控制高路堤的稳定性,必须深入研究其影响因素并采取合理的工程措施,如削坡、减重、反压、排水等。

The design of highway embankment slope is a key factor to ensure the quality of the project. It not only plays an important role in the stability of the basic body, but also plays an important role in the normal functioning of the pavement structure and the cost of the project. The stability of road embankment slope analysis method used at present can be divided into two categories： One is the numerical method used in scientific research, through establishing the constitutive model of embankment soil, combined with the test for physical and mechanical parameters of soil, and then set the boundary conditions by the finite element method to calculate the stress and strain of each point in the the relationship, through the theoretical analysis method to determine the stability of the slope. Two, there are many applications in engineering. However, considering the characteristics of the soil itself, the slope sliding soil is regarded as rigid body, which causes sliding failure along the plane or surface, such as the limit equilibrium method. In order to control the stability of the high embankment, it is necessary to study its influence factors and take reasonable engineering measures, such as slope cutting, weight reduction, backpressure, drainage and so on.