正交试验设计方法在库岸滑坡敏感性分析中的应用
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摘要
在阐述正交试验设计方法的基础上,结合下土地岭滑坡工程实例,选取了6个影响因素进行敏感性分析,极差分析及方差分析结果表明:6个影响因素的敏感性由大到小依次为内摩擦角、库水位变化H、地震加速度系数a、内聚力C、滑体容重γ、路面荷载Q,而内摩擦角、库水位变化H、地震加速度系数a是下土地岭滑坡稳定性的高度显著影响因素,内聚力C是该滑坡稳定性的显著影响因素。
The stability of bank landslide is influenced by many factors.The sensitivity of influential factors on bank landslide stability can be arranged and the significance can be tested through sensitivity analysis.With Xiatudiling landslide as an example,six influential factors were chosen and sensitivity analysis was performed based on the brief introduction to the orthogonal experiment design method.The results of the range analysis and variance analysis indicate that the sequence of the sensitivity,from big to small,is that of internal friction angle,the change of water level,earthquake acceleration coefficient,cohesive force,unit weight and pavement load.Among them,the first three are highly significant factors and the cohesive force is the remarkable factor.
The stability of bank landslide is influenced by many factors.The sensitivity of influential factors on bank landslide stability can be arranged and the significance can be tested through sensitivity analysis.With Xiatudiling landslide as an example,six influential factors were chosen and sensitivity analysis was performed based on the brief introduction to the orthogonal experiment design method.The results of the range analysis and variance analysis indicate that the sequence of the sensitivity,from big to small,is that of internal friction angle,the change of water level,earthquake acceleration coefficient,cohesive force,unit weight and pavement load.Among them,the first three are highly significant factors and the cohesive force is the remarkable factor.
引文
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[2]崔芳鹏,胡瑞林,谭儒蛟,等.青海八大山滑坡群形成机制及稳定性评价研究[J].岩石力学与工程学报,2008,27(4):848-857.
[3]殷跃平,李廷强,唐军.四川省丹巴县城滑坡失稳及应急加固研究[J].岩石力学与工程学报,2008,27(5):971-978.
[4]李瑞娥,谢永利,王家鼎.云南公路滑坡稳定性分析中模糊信息分析法的应用[J].工程地质学报,2008,16(1):130-134.
[5]Li,S.J.,X.T.Feng,J.A.Knappett.NumericalanalysisofslopestabilityinfluencedbyvaryingwaterconditionsinthereservoirareaoftheThreeGorges,China[A].ProceedingsoftheTenthInternationalSymposiumonLandslidesandEngineeringSlopes(Volume1)[C].London:Taylor&FrancisGroup,2008.803-807.
[6]罗红明,唐辉明,章广成,等.库水位涨落对库岸滑坡稳定性的影响[J].地球科学——中国地质大学学报,2008,33(5):687-692.
[7]倪恒,刘佑荣,龙治国.正交设计在滑坡敏感性分析中的应用[J].岩石力学与工程学报,2002,21(7):989-992.
[8]吴翊,李永乐,胡庆军.应用数理统计[M].长海:国防科技大学出版社,1995.247-252.
[9]张旭辉,龚晓南,徐日庆.边坡稳定影响因素敏感性的正交法计算分析[J].中国公路学报,2003,16(1):36-39.
[10]朱杰.岩质边坡的关键块体稳定性影响因素的敏感性研究[J].工程地质学报,2007,15(2):249-251.
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