基于任意滑动面的糯扎渡堆石坝稳定验算
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摘要
以西部强震区糯扎渡高心墙堆石坝为例,采用拟静力抗震安全系数和Newmark刚塑体滑移量验算了动力稳定性,基于工程实际确定由若干变量控制的任意滑动面,采用Morgenstern-Price法计算安全系数,并结合和声优化算法搜索坝坡在地震荷载作用下的临界滑动面及相应安全系数,依据Newmark滑移法确定滑动体的地震滑移量。分析结果表明,该坝滑移量超过标准,建议坝顶部位应采取加固措施。
Taking Nuozhadu high core wall rock-fill dam in western meizoseismal area for an example,pseudo-static limit equilibrium method and Newmark slide displacement are used to check dynamic stability.Firstly,the non-circular slip surface is determined by several engineering control variables and the safety factor is calculated by using Morgenstern-Price method.Then,the critical slip surface of dam and its safety factor under the action of earthquake load is obtained by harmony search algorithm.Finally,the seismic sliding displacement is investigated based on the Newmark sliding method.The results show that the sliding displacement of the dam exceeds the standard value,which should be taken measures for reinforcing the dam crest.
Taking Nuozhadu high core wall rock-fill dam in western meizoseismal area for an example,pseudo-static limit equilibrium method and Newmark slide displacement are used to check dynamic stability.Firstly,the non-circular slip surface is determined by several engineering control variables and the safety factor is calculated by using Morgenstern-Price method.Then,the critical slip surface of dam and its safety factor under the action of earthquake load is obtained by harmony search algorithm.Finally,the seismic sliding displacement is investigated based on the Newmark sliding method.The results show that the sliding displacement of the dam exceeds the standard value,which should be taken measures for reinforcing the dam crest.
引文
[1]李亮,王玉杰,王秋生,等.土坡稳定分析中模拟任意滑动面的新策略及其效率分析[J].水利学报,2008,39(5):535-541.
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[3]中国水利水电科学研究院,电力工业部昆明勘测设计研究院,电力工业部西北勘测设计研究院,等.水工建筑物抗震设计规范(DL5073-2000)[S].北京:中国电力出版社,2001.
[4]张锐,迟世春,林皋,等.地震加速度动态分布及对高土石坝坝坡抗震稳定的影响[J].岩土力学,2008,29(4):1 072-1 076.
[5]GeemZ W,Ki mJ H,Loganathan G V.A New Heuris-tic Opti mization Algorithm:Harmony Search[J].Si mu-lation,2001,76(2):60-68.
[6]李亮,迟世春,褚雪松.基于修复策略的改进和声搜索算法求解土坡非圆临界滑动面[J].岩土力学,2006,27(10):1 714-1 718.
[2]朱大勇,李焯芬,黄茂松,等.对3种著名边坡稳定性计算方法的改进[J].岩石力学与工程学报,2005,24(2),183-194.
[3]中国水利水电科学研究院,电力工业部昆明勘测设计研究院,电力工业部西北勘测设计研究院,等.水工建筑物抗震设计规范(DL5073-2000)[S].北京:中国电力出版社,2001.
[4]张锐,迟世春,林皋,等.地震加速度动态分布及对高土石坝坝坡抗震稳定的影响[J].岩土力学,2008,29(4):1 072-1 076.
[5]GeemZ W,Ki mJ H,Loganathan G V.A New Heuris-tic Opti mization Algorithm:Harmony Search[J].Si mu-lation,2001,76(2):60-68.
[6]李亮,迟世春,褚雪松.基于修复策略的改进和声搜索算法求解土坡非圆临界滑动面[J].岩土力学,2006,27(10):1 714-1 718.
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