基于永久位移比理论的岩质边坡动力稳定性研究
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摘要
提出了一种新的岩质边坡动力稳定性评价方法,该方法以岩质边坡沿滑动面的地震永久位移作为失稳判据,结合动力强度折减法,给出一个物理意义明确的指标用以评价岩质边坡的动力稳定性。采用E.Hoek和J.W.Bray提供的典型算例对所提方法进行说明和验证,并对各烈度地震作用下楔形体边坡的动力稳定性规律进行研究,取得了较好的结果。将该方法应用于汶川地震区岩质边坡实例研究中,所得稳定性分析结果与实际地质调查情况相符,验证了方法的工程实用性和有效性。
A new method is proposed for analyzing dynamic stability of rock slope under seismic load. In the proposed method,the permanent displacement of rock slope is taken as the failure criterion,and an index that has a clear physical meaning is provided to evaluate the dynamic stability of rock slope based on dynamic strength reduction theory. An example given by E. Hoek and J. W. Bray is presented to demonstrate and verify the proposed method,and then the dynamic stability law of the example under different seismic intensity is analyzed by the method,and the calculated result is satisfied. Finally,the method is applied to study a rock slope case in Wenchuan earthquake zone,and the results are well consistent with the actual situation,verifying its practicability and effectiveness.
A new method is proposed for analyzing dynamic stability of rock slope under seismic load. In the proposed method,the permanent displacement of rock slope is taken as the failure criterion,and an index that has a clear physical meaning is provided to evaluate the dynamic stability of rock slope based on dynamic strength reduction theory. An example given by E. Hoek and J. W. Bray is presented to demonstrate and verify the proposed method,and then the dynamic stability law of the example under different seismic intensity is analyzed by the method,and the calculated result is satisfied. Finally,the method is applied to study a rock slope case in Wenchuan earthquake zone,and the results are well consistent with the actual situation,verifying its practicability and effectiveness.
引文
[1]卢坤林,朱大勇,朱亚林,等.三维边坡地震永久位移初探[J].岩土力学,2011,32(5):1425-1429.
[2]祁生文.考虑结构面退化的岩质边坡地震永久位移研究[J].岩土工程学报,2007,29(3):452-457.
[3]徐光兴.地震作用下边坡工程动力响应与永久位移分析[D].成都:西南交通大学,2011.
[4]邓东平,李亮,罗伟.地震荷载作用下土钉支护边坡稳定性拟静力分析[J].岩土力学,2012,(6):1787-1794.
[5]郭明伟,葛修润,王水林,等.基于矢量和方法的边坡动力稳定性分析[J].岩石力学与工程学报,2011,30(3):572-579.
[6]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报,2007,26(12):2385-2394.
[7]郑颖人,叶海林,黄润秋,等.边坡地震稳定性分析探讨[J].地震工程与工程振动,2010,(2):173-180.
[8]Hoek E,Bray J.Rock slope engineering[M].3rd ed.London:Institution of Mining and Metallurgy,1981.
[9]胡聿贤.地震工程学[M].北京:地震出版社,1988:71-72.
[10]戴妙林,李同春.基于降强法数值计算的复杂岩质边坡动力稳定性安全评价分析[J].岩石力学与工程学报,2007,26(S1):2049-2054.
[2]祁生文.考虑结构面退化的岩质边坡地震永久位移研究[J].岩土工程学报,2007,29(3):452-457.
[3]徐光兴.地震作用下边坡工程动力响应与永久位移分析[D].成都:西南交通大学,2011.
[4]邓东平,李亮,罗伟.地震荷载作用下土钉支护边坡稳定性拟静力分析[J].岩土力学,2012,(6):1787-1794.
[5]郭明伟,葛修润,王水林,等.基于矢量和方法的边坡动力稳定性分析[J].岩石力学与工程学报,2011,30(3):572-579.
[6]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报,2007,26(12):2385-2394.
[7]郑颖人,叶海林,黄润秋,等.边坡地震稳定性分析探讨[J].地震工程与工程振动,2010,(2):173-180.
[8]Hoek E,Bray J.Rock slope engineering[M].3rd ed.London:Institution of Mining and Metallurgy,1981.
[9]胡聿贤.地震工程学[M].北京:地震出版社,1988:71-72.
[10]戴妙林,李同春.基于降强法数值计算的复杂岩质边坡动力稳定性安全评价分析[J].岩石力学与工程学报,2007,26(S1):2049-2054.
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