地震作用下顺层岩质边坡变形破坏坡面效应
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摘要
地震作用下,坡面形态对岩质边坡的变形破坏过程存在一定影响。文中以汶川地区公路沿线具有典型坡面形态的顺层岩质边坡为例,采用离散元UDEC软件,模拟4种坡面形态下边坡的变形破坏过程,并监测坡体关键位置处的位移和坡体应力场。通过模拟结果,对比分析不同坡型边坡变形破坏的动力响应时间、边坡的破坏位置,以及边坡破坏的程度和模式,总结出地震作用下该类顺层岩质边坡变形破坏的坡面效应,最后通过应力场分析引起坡面效应的原因。
Topography have some effects on the deformation and failuar of the bedding rock slope under earthquake.The distinct elements software UDEC are used to simulate deformation and failure of four kinds of slope which is based on the highway in Wenchuan area,and to monitor the displacement of critical position on the slope and stress field of the slope.Through simulation results,the different dynamic response time of the deformation and failure,the damage location,and the extent and mode of failure of the four types of slope can be comparatively analyzed.With the analysis,topography effects on deformation and failure of the class bedding rock slope under earthquak can be summed up.Stress analysis of slope has been carried out to find out the reason of topography effects.
Topography have some effects on the deformation and failuar of the bedding rock slope under earthquake.The distinct elements software UDEC are used to simulate deformation and failure of four kinds of slope which is based on the highway in Wenchuan area,and to monitor the displacement of critical position on the slope and stress field of the slope.Through simulation results,the different dynamic response time of the deformation and failure,the damage location,and the extent and mode of failure of the four types of slope can be comparatively analyzed.With the analysis,topography effects on deformation and failure of the class bedding rock slope under earthquak can be summed up.Stress analysis of slope has been carried out to find out the reason of topography effects.
引文
[1]黄润秋,李为乐.“5.12”汶川大地震触发地质灾害的发育分布规律[J].岩石力学与工程学报,2008,27(12).
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[3]唐海,李俊如.凸形地貌对爆破震动波传播影响的数值模拟[J].岩土力学,2010,31(4):1289-1294.
[4]唐海,李俊如.凹形地貌对爆破振动波传播影响的数值模拟[J].岩土力学,2008,29(6):1540-1544.
[5]任自铭,姚令侃.坡面形态对地震作用下土质边坡稳定性影响[J].路基工程,2008,140(5):5-7.
[6]Itasca Consulting Group,Inc.Universal Distinct Ele-ment Code Theory and background[M].2005.
[7]崔芳鹏,许强,等.地震动力作用触发的斜坡崩滑响应研究[J].三峡大学学报,2011,33(6):23-28.
[8]赵伟华,黄润秋,等.强震条件下碎裂岩体崩塌机理及崩塌后壁对堆积体稳定性影响研究[J].工程地质学报,2011,19(2):205-212.
[9]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,2005.
[10]黄润秋,邓荣贵,等.高边坡物质运动全过程模拟[M].成都科技大学出版社,1993.
[11]李海波,肖克强.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.
[12]肖克强,等.地震荷载作用下顺层岩体边坡变形特征分析[J].岩石力学与工程学报,2007,28(8):1557-1564.
[13]袁进科,黄润秋,等.汶川地震触发平溪村滑坡特征及成因分析[J].水文地质工程地质,2011,38(3):110-114.
[14]胡聿贤.地震工程学[M].北京:地震出版社,1988.
[15]李东,罗勇.软硬岩质路基边坡破坏滑移离散元块体数值模拟[J].工程勘察,2010,(1):534-539.
[16]George D Bouckovalas,Achilleas G.Papadimitriou.Numerical evaluation of slope topography effects onseismic ground motion[J].Soil Dynamics and Earth-quake Engineering,2005,(25):547-558.
[2]唐海,李俊如,等.地形地貌对爆破振动波传播的影响实验研究[J].岩石力学与工程学报,2007,26(9):1817-1823.
[3]唐海,李俊如.凸形地貌对爆破震动波传播影响的数值模拟[J].岩土力学,2010,31(4):1289-1294.
[4]唐海,李俊如.凹形地貌对爆破振动波传播影响的数值模拟[J].岩土力学,2008,29(6):1540-1544.
[5]任自铭,姚令侃.坡面形态对地震作用下土质边坡稳定性影响[J].路基工程,2008,140(5):5-7.
[6]Itasca Consulting Group,Inc.Universal Distinct Ele-ment Code Theory and background[M].2005.
[7]崔芳鹏,许强,等.地震动力作用触发的斜坡崩滑响应研究[J].三峡大学学报,2011,33(6):23-28.
[8]赵伟华,黄润秋,等.强震条件下碎裂岩体崩塌机理及崩塌后壁对堆积体稳定性影响研究[J].工程地质学报,2011,19(2):205-212.
[9]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,2005.
[10]黄润秋,邓荣贵,等.高边坡物质运动全过程模拟[M].成都科技大学出版社,1993.
[11]李海波,肖克强.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.
[12]肖克强,等.地震荷载作用下顺层岩体边坡变形特征分析[J].岩石力学与工程学报,2007,28(8):1557-1564.
[13]袁进科,黄润秋,等.汶川地震触发平溪村滑坡特征及成因分析[J].水文地质工程地质,2011,38(3):110-114.
[14]胡聿贤.地震工程学[M].北京:地震出版社,1988.
[15]李东,罗勇.软硬岩质路基边坡破坏滑移离散元块体数值模拟[J].工程勘察,2010,(1):534-539.
[16]George D Bouckovalas,Achilleas G.Papadimitriou.Numerical evaluation of slope topography effects onseismic ground motion[J].Soil Dynamics and Earth-quake Engineering,2005,(25):547-558.
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