基于正交设计的路堤稳定影响因素敏感性分析

Sensitivity Analysis of Embankment Stability Factors Basedon Orthoplan

针对边坡和地基2种路堤稳定主控条件,建立了路堤边坡和路堤地基稳定分析模型,采用正交设计方法研究了对应计算模型的各影响因素主次顺序,讨论了均质边坡条件下影响路堤边坡稳定性的各因素间交互作用.研究表明:路堤边坡稳定影响因素敏感性按内摩擦角、坡高、黏聚力、边坡比依次减小边坡比与内摩擦角、坡高与黏聚力间显著交互作用,取值水平不当会影响各因素的敏感性排序;地基及路堤稳定性主要受地基控制,地基土强度和地坡度是路堤稳定的主要因素.

Contrary to two kinds of stability control conditions about embankment slope and foundation,stability analysis model of embankment slope and stability analysis model of embankment foundation were established,and primary and secondary order of each factor were researched to the corresponding calculation model by orthoplan,besides the paper focused on discussing the interaction between various factors which impact the embankment slope stability on uniform slope conditions.The results show that the factors sensitivity of embankment slope stability gradually decreases according to internal friction angle,slope height,cohesion,slope ratio,and there is a significant interaction between ratio and internal friction angle,so as slope height and cohesion,besides the improper value of each factor will affect the sort by sensitivity,moreover the foundation soil strength and slope are the main factors of slope stability.