岩质路堑深边坡稳定性评价的模糊概率方法
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摘要
边坡工程是一个动态的、模糊的、开放的复杂系统,影响边坡稳定性的因素复杂且具有随机性和模糊性,传统的分析方法难以对复杂边坡的稳定性作出符合实际的评价。运用模糊概率的基本原理,建立了岩质路堑深边坡稳定性评价的模糊概率模型。在此模型中,综合选取了边坡岩体质量系数SRQC、边坡结构系数SSC、坡高系数SHC、坡角系数SCC、工程因素影响系数EFEC等5个评价指标因子;同时将边坡稳定性评价等级划分为很不稳定、不稳定、基本稳定、稳定以及很稳定5个等级。利用模糊概率模型对20个典型的边坡工程进行了稳定性评价分析,结果表明:该方法具有明显的合理性和可靠性,为边坡工程的预测与防治提供了新的途径。
Slope engineering is a dynamic,fuzzy,open and complicated system,and the factors which control and affect slope stability are random and fuzzy variables.It is difficult to evaluate the stability of complicated slopes by traditional analysis method.Based on the basic theory of fuzzy probability,the fuzzy probability model of stability evaluation of depth cutting slope is proposed.Some main control factors of rock slope,such as slope rock quality coefficient,slope structure coefficient,slope height coefficient,slope angle coefficient and engineering factor effect coefficient etc.are selected.At the same time,the slope stability grades are classified as the very instable,instable,basically stable,stable and very stable in the prediction model.20 typical slope engineerings are performed by this model.The prediction results agree well with the practical records.It indicates that the fuzzy probability model is reasonable and effective to evaluate the stability of depth cutting slope in rock mass,and provides scientific basis for reducing and preventing of the instability of rock slope.
Slope engineering is a dynamic,fuzzy,open and complicated system,and the factors which control and affect slope stability are random and fuzzy variables.It is difficult to evaluate the stability of complicated slopes by traditional analysis method.Based on the basic theory of fuzzy probability,the fuzzy probability model of stability evaluation of depth cutting slope is proposed.Some main control factors of rock slope,such as slope rock quality coefficient,slope structure coefficient,slope height coefficient,slope angle coefficient and engineering factor effect coefficient etc.are selected.At the same time,the slope stability grades are classified as the very instable,instable,basically stable,stable and very stable in the prediction model.20 typical slope engineerings are performed by this model.The prediction results agree well with the practical records.It indicates that the fuzzy probability model is reasonable and effective to evaluate the stability of depth cutting slope in rock mass,and provides scientific basis for reducing and preventing of the instability of rock slope.
引文
[1]夏元友,李梅.边坡稳定性评价方法研究及发展趋势[J].岩石力学与工程学报,2002,21(7):1 087-1 091.
[2]刘章军,叶燎原.基于模糊概率的震害预测模型及其应用[J].自然灾害学报,2005,14(4):115-120.
[3]刘章军,叶燎原,彭刚.砂土地震液化的模糊概率评判方法[J].岩土力学,2008,29(4):876-880.
[4]汪培庄.模糊集合论及其应用[M].上海:上海科学技术出版社,1983.
[5]陈昌彦,王思敬,沈小克.边坡岩体稳定性的人工神经网络预测模型[J].岩土工程学报,2001,23(2):157-161.
[6]包惠明,胡长顺.基于ANN下的岩质路堑深边坡稳定性评价[J].交通运输工程学报,2002,2(3):52-56.
[7]BIENIAWSKI Z T.The geomechanics classification in rock engineering applications[C]//Proceedings of the 4th International Congress in Rock Mechanics.[S.l.]:International Society for Rock Mechanics,1979,2:41-48.
[8]ROMANA M.SMR classification[C]//Proceedings of the 7th International Congress in Rock Mechanics.[S.l.]:International Society for Rock Mechanics,1992:78-84.
[2]刘章军,叶燎原.基于模糊概率的震害预测模型及其应用[J].自然灾害学报,2005,14(4):115-120.
[3]刘章军,叶燎原,彭刚.砂土地震液化的模糊概率评判方法[J].岩土力学,2008,29(4):876-880.
[4]汪培庄.模糊集合论及其应用[M].上海:上海科学技术出版社,1983.
[5]陈昌彦,王思敬,沈小克.边坡岩体稳定性的人工神经网络预测模型[J].岩土工程学报,2001,23(2):157-161.
[6]包惠明,胡长顺.基于ANN下的岩质路堑深边坡稳定性评价[J].交通运输工程学报,2002,2(3):52-56.
[7]BIENIAWSKI Z T.The geomechanics classification in rock engineering applications[C]//Proceedings of the 4th International Congress in Rock Mechanics.[S.l.]:International Society for Rock Mechanics,1979,2:41-48.
[8]ROMANA M.SMR classification[C]//Proceedings of the 7th International Congress in Rock Mechanics.[S.l.]:International Society for Rock Mechanics,1992:78-84.
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