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以湖南省常吉高速公路某路段左侧边坡为依托,通过相关地质资料分析,选取了对边坡稳定性影响较大的坡度、坡高、粘聚力、内摩擦角和弹性模量五个指标。并借助于有限元强度折减模块,采用单因素敏感性分析方法进行了边坡稳定性影响参数敏感性分析并比较分析结果。结果表明:常吉高速公路边坡的稳定性参数相对于边坡安全系数的敏感性排序从大到小依次为:坡度、坡高、内摩擦角、粘聚力、弹性模量,边坡的失稳主要依赖于坡度和坡高,此为山区公路边坡稳定性评价分级和针对性地防治设计起到了指导作用。
Based on the left side slope of a certain section of Changji Expressway in Hunan Province, through the analysis of the related geological data, the five factors of slope, slope height, cohesion, internal friction angle and elastic modulus index. By means of finite element strength reduction module, single factor sensitivity analysis method was used to analyze the sensitivity of slope stability parameters and compare the results. The results show that the order of sensitivity of slope stability parameters to slope safety factor is as follows: slope, slope height, internal friction angle, cohesion, elastic modulus, loss of slope The stability mainly relies on the slope and slope height, which plays a guiding role in the slope stability evaluation classification and targeted prevention and control design of mountainous highway.