地震边坡失稳机理及稳定性分析

言志信; 张森; 张学东; 段建

地震边坡失稳机理及稳定性分析

1.
兰州大学土木工程与力学学院兰州 730000;
2.
西部灾害与环境力学教育部重点实验室兰州 730000

基金项目:

高等学校博士学科点专项科研基金项目（20090211110016;甘肃省科技计划资助项目（096RJZA048）

详细信息

作者简介:
言志信,主要从事岩土、爆破、地质工程研究工作.Email:yzx10@163.com

中图分类号: TU457
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- 文章访问数: 4251
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- 被引次数: 0
出版历程
- 收稿日期: 2010-04-20
- 修回日期: 2010-10-31
- 刊出日期: 2010-12-25

FAILURE MECHANISM AND STABILITY ANALYSIS OF SLOPE UNDER EARTHQUAKE

1.
School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000;
2.
Key Laboratory of Mechanics on Disaster and Environment in Western China,Ministry of Education,Lanzhou 730000

摘要

摘要: 通过对汶川地震边坡调研,发现大量边坡破坏形式为坡顶拉裂、下部坡体剪切破坏。本文利用有限差分程序,从边坡土体的应力状态出发,通过监测边坡土体的状态、位移和剪应变增量变化等,分析了岩土体在静力、横向地震和耦合地震作用下的破坏过程,发现坡顶附近发生张破坏,以下部位发生剪切破坏,而非传统的地质工程观点地震边坡破坏主要是地震惯性力造成的剪切破坏。并提出一种新方法关键点相对位移法,来判断边坡的动力稳定性,数值模拟结果与已有研究成果及震后灾害调查结果具有良好的一致性。
- 边坡工程 /
- 地震 /
- 破坏机制 /
- 关键点相对位移法 /
- 动力稳定性
Abstract: Investigation of the slopes in Wenchuan earthquake shows that tension failures mostly appear in the slope crests,and shear failure in slope toe. Beginning with the stress state of soil,using the finitedifference method,the failure process of slope is analyzed under the given conditions of static,horizontal and coupled earthquake by monitoring the changing of state,displacement,and shearstrain increment. The calculated results indicate that the slope crest is tensile damage and shear failure appears in slope toe. It is different from the traditional opinion of geological engineering that slope damage under earthquakes is mainly shear failure due to seismic inertia force. A new method of the relative displacement of key points is put out to judge the dynamic stability. Numerical simulation results have good consistency with existing research results and postseismic investigation findings．
- Slope engineering /
- Earthquake /
- Failure mechanism /
- The relative displacement of key points /
- Dynamic stability

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参考文献(1)

[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研究
[J].岩石力学与工程学报, 2009,27(12)： 2585～2592.Huang Runqiu,Li Weile. Research on development and distribution on rules of geohazards induced by wenchuan earthquake on 12thMay. Chinese Journal of Rock Mechanics and Engineering, 2009,27(12)： 2585～2592.

[2] 祁生文,伍法权,严福章,刘春玲.岩质边坡动力反应分析
[M].北京: 科学出版社, 2007.Qi Shengwen,Wu Faquan,Yan Fuzhang. Dynamic Response of Rock Slope Analysis.Beijing: Science Press, 2007．

[3] Boore D M,Harmsen S C,Harding S T. Wave scattering from a step change in surface topography. Bull. Seismol. Soc.Am, 1981,71(1)： 117～25．

[4] George D.Bouckovalas,Achilleas G. Papadimitriou. Numerical evaluation of slope topography effects on seismic ground motion
[J]. Soil Dynamics and Earthquake Engineering 2005,(25): 547～558．

[5] Ashford S,Sitar N. Analysis of topographic amplification of inclined shear waves in a steep coastal bluff. Bull Seismol Soc Am 1997; 87(3)： 692～700．

[6] Ashford S,Sitar N,Lysmer J,Deng N. Topographic effects on the seismic response of steep slopes. Bull Seismol Soc Am 1997; 87(3)： 701～709．

[7] 姜彤,马莎,许兵,马瑾.边坡在地震作用下的加卸载响应规律研究
[J].岩石力学与工程学报, 2004,22(23)： 3803～3807.Jang Tong,Ma Sha,Xu Bing,Ma Jin. Study on laws of loadunload response of slope under seismic load. Chinese Journal of Rock Mechanics and Engineering, 2004,22(23)： 3803～3807.

[8] 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.Li Haibo,Xiao Keqiang,Liu Yaqun. Factor of safety analysis of bedding rock slope under seismic load. Chinese Journal of Rock Mechanics and Engineering. 2007,26(12)： 2385～2394．

[9] 郑颖人,叶海林,黄润秋.地震边坡破坏机制及其破裂面的分析探讨
[J].岩石力学与工程学报, 2009,28(8)： 1714～1723.Zheng Yingren,Ye Hailin,Huang Runqiu. Analysis and discussion of failure mechanism and fracture surface of slope under earthquake. Chinese Journal of Rock Mechanics and Engineering, 2009,28(8)： 1714～1723.

[10] 黄润秋.汶川80 级地震触发崩滑灾害机制及其地质力学模式
[J].岩石力学与工程学报, 2009,28(6)： 1239～1249.Huang Runqiu. Mechanism and geotechnical modes of landslide hazards triggered by Wenchuan 80 earthquake. Chinese Journal of Rock Mechanics and Engineering, 2009,28(6)： 1239～1249．

[11] 卢萌盟,卫明山,等.全长黏结式预应力锚索加固基坑仿真实验研究
[J].岩土工程学报, 2006,28(1)： 92～96.Lu Mengmeng,Wei Mingshan,et al. Simulation tests on pit foundation reinforced by fulllengthbonding prestressed cables. Chinese Journal of Geotechnical Engineering, 2006,28(1)： 92～96.

[12] 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, 1993.Zhang Zhuoyuan,Wang Shitian,Wang Lansheng. Principles of Engineering Geology. Beijing: Geological Publishing House, 1993．

[13] 胡广韬.滑坡动力学
[M].北京: 地质出版社, 1995.Hu Guangtao. Landslide Dynamics. Beijing：Geological Publishing House, 1995.

[14] 许强,黄润秋. 5·12汶川大地震诱发大型崩滑灾害动力特征初探
[J].工程地质学报.2008, 721～729.Xu Qiang,Huang Runqiu. Kinetics characteristics of large landslides triggered by may 12th Wenchuan earthquake. Journal of Engineering Geology.2008, 721～729.

[15] 李秀珍,孔纪名，邓红艳，等.“5·12”汶川地震滑坡特征及失稳破坏模式分析
[J]. 四川大学学报(工程科学版).2009,(41)3： 72～77.Li Xiuzhen,Kong Jiming, Deng Hongyan, et al. Analysis on characteristics and deformation failure mode of largescale landslides induced by“5·12” Wenchuan earthquake. Journal of Sichuan University(Engineering Science edition).2009,(41)3： 72～77.

[16] Lin M L,Wang K L. Seismic slope behavior in a largescale shaking table model test
[J]. Engineering Geology, 2006,86(2)： 118～133．

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