石头坪黄土高边坡稳定性的可靠度及敏感性分析
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摘要
以兰州金城公园二期石头坪景区东侧典型边坡为研究对象,将边坡土体物理力学参数视为随机变量,采用蒙特卡洛随机抽样法及极限平衡法,分析了天然工况和暴雨工况条件下边坡的可靠度指标、失效概率,也分析了边坡安全系数对参数(c,φ,γ)的敏感性。结果表明:暴雨工况边坡可靠度指标明显低于天然工况,失效概率比天然工况明显增大;边坡的安全系数对土体的内摩擦角φ最敏感,粘聚力和重度γ次之,且与土体的内摩擦角φ、粘聚力c呈正相关关系,而与土体重度γ呈负相关关系。综合分析,两种工况边坡均处于稳定状态,适宜景区建设。
Taking the typical eastern side slope of the two stage Stone Ping area of Jincheng Park in Lanzhou as the research object,the physical and mechanical parameters of the slope soil were considered as random variables. The reliability index,failure probability and the safety factor of the slope were analyzed by the Monte Carlo random sampling and the limit equilibrium method; The sensitivity of slope safety factor to parameters( c,φ,γ) was also analyzed. Results showed that the reliability index of the slope was obviously lower than the natural condition,and the failure probability was obviously larger than the natural condition. The safety factor of the slope was most sensitive to the internal friction angleφ of the soil,and the cohesion c and the gravityγ were the second,it was positively correlated with the internal frictionφ angle and cohesion c of the soil,but negatively correlated with the soil gravityγ. Based on the comprehensive analysis,the slope of the two working conditions was in the stable state,and suitable for scenic area construction.
Taking the typical eastern side slope of the two stage Stone Ping area of Jincheng Park in Lanzhou as the research object,the physical and mechanical parameters of the slope soil were considered as random variables. The reliability index,failure probability and the safety factor of the slope were analyzed by the Monte Carlo random sampling and the limit equilibrium method; The sensitivity of slope safety factor to parameters( c,φ,γ) was also analyzed. Results showed that the reliability index of the slope was obviously lower than the natural condition,and the failure probability was obviously larger than the natural condition. The safety factor of the slope was most sensitive to the internal friction angleφ of the soil,and the cohesion c and the gravityγ were the second,it was positively correlated with the internal frictionφ angle and cohesion c of the soil,but negatively correlated with the soil gravityγ. Based on the comprehensive analysis,the slope of the two working conditions was in the stable state,and suitable for scenic area construction.
引文
[1]孙文杰.基于Morgenstern-price极限平衡法的尾矿坝边坡稳定性分析[J].有色金属(矿山部分),2018(1):101-102.
[2]种记鑫.基于有限元极限平衡法的锚固边坡稳定性分析[J].防灾减灾学报,2017(4):32-38.
[3]杨章泉.基于极限平衡法的坡体不同线性滑面分析[J].甘肃水利水电技术,2017(11):25-28.
[4]刘生纬,赵建昌,张家玮.解析法和有限元法在高边坡稳定性分析中的应用[J].兰州交通大学学报,2017(6):96-100.
[5]梁远禄,原宝盛,闫强.基于有限元的边坡无支护分级开挖过程稳定性分析[J].公路,2017(11):58-61.
[6]孙聪,余乐,方四发,等.基于上限有限元法的节理岩质边坡稳定性分析[J].公路交通科技,2017(11):43-49.
[7]孙世国,杨宏,冉启发,等.典型排土场边坡稳定性控制技术[M].北京:冶金工业出版社,2011.
[8]莫玻.基于可靠度理论的边坡稳定性分析方法的研究[D].重庆:重庆大学,2012.
[9]谢秀栋,方建瑞,范炜,等.基于可靠度理论的边坡稳定性分析研究[J].自然灾害学报,2008,17(2):110-115.
[10]李猛.边坡稳定可靠度的蒙特卡罗数值模拟及其应用研究[D].郑州:郑州大学,2004.
[11]孔思丽.边坡稳定的有限元可靠度分析方法及参数敏感性研究[D].贵阳:贵州大学,2015.
[12]朱晴晴,倪万魁,王衍汇,等.陕北某黄土高填方边坡可靠性分析及坡型优化[J].工程地质学报,2016,24(Sl.):438-444.
[13]雷德鑫,易武,柳青,等.三峡库区卧沙溪滑坡稳定性的可靠度及敏感性分析[J].安全与环境工程,2018,25(1):23-28.
[14]张璐璐,张洁,等.岩土工程可靠度理论[M].上海:同济大学出版社,2011.
[15]丁孝勇.不同类型土坡稳定可靠度分析方法及其应用[D].广州:华南理工大学,2014.
[16]高喆.兰州市西固区山洪灾害分析研究[D].兰州:兰州大学,2016.
[17]高德彬,倪万魁,梁伟.基于Monte-Carlo模拟的公路黄土高边坡可靠性研究[J].公路交通科技,2005,22(9):66-68.
[18]徐卫来,张志腾.滑坡失稳破坏概率及可靠度研究[J].灾害学,1995,10(4):33-37.
[2]种记鑫.基于有限元极限平衡法的锚固边坡稳定性分析[J].防灾减灾学报,2017(4):32-38.
[3]杨章泉.基于极限平衡法的坡体不同线性滑面分析[J].甘肃水利水电技术,2017(11):25-28.
[4]刘生纬,赵建昌,张家玮.解析法和有限元法在高边坡稳定性分析中的应用[J].兰州交通大学学报,2017(6):96-100.
[5]梁远禄,原宝盛,闫强.基于有限元的边坡无支护分级开挖过程稳定性分析[J].公路,2017(11):58-61.
[6]孙聪,余乐,方四发,等.基于上限有限元法的节理岩质边坡稳定性分析[J].公路交通科技,2017(11):43-49.
[7]孙世国,杨宏,冉启发,等.典型排土场边坡稳定性控制技术[M].北京:冶金工业出版社,2011.
[8]莫玻.基于可靠度理论的边坡稳定性分析方法的研究[D].重庆:重庆大学,2012.
[9]谢秀栋,方建瑞,范炜,等.基于可靠度理论的边坡稳定性分析研究[J].自然灾害学报,2008,17(2):110-115.
[10]李猛.边坡稳定可靠度的蒙特卡罗数值模拟及其应用研究[D].郑州:郑州大学,2004.
[11]孔思丽.边坡稳定的有限元可靠度分析方法及参数敏感性研究[D].贵阳:贵州大学,2015.
[12]朱晴晴,倪万魁,王衍汇,等.陕北某黄土高填方边坡可靠性分析及坡型优化[J].工程地质学报,2016,24(Sl.):438-444.
[13]雷德鑫,易武,柳青,等.三峡库区卧沙溪滑坡稳定性的可靠度及敏感性分析[J].安全与环境工程,2018,25(1):23-28.
[14]张璐璐,张洁,等.岩土工程可靠度理论[M].上海:同济大学出版社,2011.
[15]丁孝勇.不同类型土坡稳定可靠度分析方法及其应用[D].广州:华南理工大学,2014.
[16]高喆.兰州市西固区山洪灾害分析研究[D].兰州:兰州大学,2016.
[17]高德彬,倪万魁,梁伟.基于Monte-Carlo模拟的公路黄土高边坡可靠性研究[J].公路交通科技,2005,22(9):66-68.
[18]徐卫来,张志腾.滑坡失稳破坏概率及可靠度研究[J].灾害学,1995,10(4):33-37.