摘要
影响路基边坡稳定性的因素很多。以榆佳高速公路路基土坡为研究对象,利用基于可靠度理论的参数敏感性分析方法,设计了容重、黏聚力、内摩擦角3因素3、4、5水平敏感性分析方案。试验中没考虑不同因素的相关性。利用不同因素、不同水平的试验结果,分析了不同组合下可靠性指标和极差的变化,确定了适用于榆佳高速公路路基土坡的不同因素对于其稳定性的影响顺序,即内摩擦角φ>黏聚力c>容重γ。通过敏感性分析认为,在确定边坡稳定性影响因素的情况下,因素水平不同划分对敏感性分析结果影响不大。
Many factors can affect stability of roadbed slope. The roadbed soil slope of Yujia highway is studied in the paper. Three factors of density, cohesion and friction angle with three, four and five level sensitivity analysis schemes are designed by means of reliability theory. Relevancy between factors is not considered in tests. Range and reliability index under different conditions are analyzed. It is found that in- fluence on roadbed slope stability exerted by friction angle is larger than that of cohesion, whose influence larger than that of density. If influence factors of slope stability are determined, sensitivity analysis results affected by divide of different levels are little.
出处
《公路》
北大核心
2013年第6期50-54,共5页
Highway
关键词
榆佳高速公路
路基土坡
正交试验
参数敏感性分析
Yujia highway
roadbed soil slope
orthogonal test
parameter sensitivity analysis
