ROCKFALL MECHANISM OF CATACLASTIC ROCK MASS AND INFLUENCE OF BACK WALL UPON THE STABILITY OF ACCUMULATION UNDER STRONG EARTHQUAKE

ZHAO Weihua; HUANG Runqiu; ZHAO Jianjun; JU Nengpan; Li Guo

Volume 19 Issue 2

Apr. 2011

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Article Navigation > JOURNAL OF ENGINEERING GEOLOGY > 2011 > 19(2): 205-212

ZHAO Weihua, HUANG Runqiu, ZHAO Jianjun, JU Nengpan, Li Guo. 2011: ROCKFALL MECHANISM OF CATACLASTIC ROCK MASS AND INFLUENCE OF BACK WALL UPON THE STABILITY OF ACCUMULATION UNDER STRONG EARTHQUAKE. JOURNAL OF ENGINEERING GEOLOGY, 19(2): 205-212.

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ROCKFALL MECHANISM OF CATACLASTIC ROCK MASS AND INFLUENCE OF BACK WALL UPON THE STABILITY OF ACCUMULATION UNDER STRONG EARTHQUAKE

State Key, Geological Hazard, Geological Environment, Chengdu University 610059

Received Date: 2010-08-20
Rev Recd Date: 2011-01-12
Publish Date: 2011-04-25

Abstract

Abstract

The Wenchuan 8.0 earthquake triggered a huge number of rockfall hazards. The hazards most happened in cataclastic rock mass. The respective stability of the back wall and the front accumulation of the slope and the influence of the back wall upon the stability of accumulation are problems that are faced by people after the earthquake. This paper takes the Ganhekou rockfalling accumulation as a example. It is based on analysis of the structure feature and genetic mechanism of the slope. It uses the 2D Discrete Element MethodUDEC to simulate the stability status and possible failure process of the slope under nature or earthquake condition.It uses the limit equilibrium theory based models and analyse the stability of accumulation before or after loaded by new substance generated by new rockfall. The results show that the genetic process of rockfalling accumulation can divided to stress redistribution, the formation of potential rockfall mass and rockfall induced by earthquake three phases. Before loading function, the accumulation is relatively stable both under nature or earthquake condition. But after considering the function of loading, it may fail under earthquake. The combined use of discrete element method and limit equilibrium method are practicable way for solving similar problem of similar slopes.
- Strong earthquake,
- Cataclastic rock mass,
- Rockfall back wall,
- Rockfalling accumulation,
- Stability

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References

[1] 黄润秋. 汶川8.0级地震触发崩滑灾害机制及地质力学模式
[J].岩石力学与工程学报, 2009, 28 (6): 1239~1249.
Huang Runqiu. Mechanism and geomechanical modes of landslide hazards triggered by Wenchuan 8.0 earthquake.Chinese Journal of Rock Mechanics and Engineering, 2009, 28 (6): 1239~1249.

[2] 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, 2008, 27 (12): 2585~2592.
Huang Runqiu,Li Weile. Research on development and distribution rules of geohazards induced by Wenchuan earthquake on 12^th May, 2008.Chinese Journal of Rock Mechanics and Engineering.2008, 27 (12): 2585~2592.

[3] 周永江, 王云开,等.高地震烈度区堆积体边坡动力响应时程特征分析
[J].山地学报, 2007, 25 (1): 93~98.
Zhou Yongjiang,Wang Kaiyun,et al.Analysis on time history dynamic response of a rockfall-type slope under high earthquake intensity.Journal of Mountain Science.2007, 25 (1): 93~98.

[4] 崔芳鹏, 胡瑞林,等.纵横波时差耦合作用的斜坡崩滑效应离散元分析——以北川唐家山滑坡为例
[J].岩石力学与工程学报, 2010, 29 (2): 319~327.
Cui Fangpeng,Hu Ruilin,et al.Discrete element analysis of collapsing and sliding response of slope triggered by time difference coupling effects of p and s seismic waves—taking Tangjiashan landslide in Beichuan county for example.Chinese Journal of Rock Mechanics and Engineering, 2010, 29 (2): 319~327.

[5] 王秀英, 聂高众,王登伟.利用强震记录分析汶川地震诱发滑坡
[J].岩石力学与工程学报, 2009, 28 (11): 2369~2376.
Wang Xiuying,Nie Gaozhong,Wang Dengwei.Analysis of landslide induced by Wenchuan earthquake by strong motion records.Chinese Journal of Rock Mechanics and Engineering, 2009, 28 (11): 2369~2376.

[6] 祁生文, 伍法权,等.地震边坡稳定性的工程地质分析
[J].岩石力学与工程学报, 2004, 23 (16): 2792~2797.
Qi Shengwen,Wu Faquan,et al.Engineering geology analysis on stability of slope under earthquake.Chinese Journal of Rock Mechanics and Engineering, 2004, 23 (16): 2792~2797.

[7] 刘红帅, 薄景山,刘德东.岩土边坡地震稳定性分析研究评述
[J].地震工程与工程振动, 2005, 25 (1): 164~171.
Liu Hongshuai,Bo Jingshan,Liu Dedong.Review on study of seismic stability analysis of rock-soil slopes.Earthquake Engineering and Engineering Vibration, 2005, 25 (1): 164~171.

[8] 沈建, 陈新民,魏平.土质边坡地震稳定性研究进展
[J].水运工程, 2009,(6): 40~46.
Shen Jian,Chen Xinmin,Wei Ping.Review of study on seismic stability of soil slopes.Port & Waterway Engineering, 2009,(6): 40~46.

[9] 崔芳鹏, 胡瑞林,张明,等.重庆小南海地震崩滑体的基本特征及开成机制研究
[J].工程地质学报, 2009, 17 (2): 167~174.
Cui Fangpeng,Hu Ruilin,Zhang Ming,et al. Basic characteristics and formation mechanism of collapsed and slided debris mass induced by Xiaonanhai earthquake in Chongqing city.Journal of Engineering Geology, 2009, 17 (2): 167~174.

[10] 刘杰, 李建林,等.基于拟静力法的大岗山坝肩边坡地震工况稳定性分析
[J].岩石力学与工程学报.2009, 28 (8): 1562~1570.
Liu Jie,Li Jianlin, et al.Stability analysis of dagangshan dam abutment slope under earthquake based on pseudo-static method.Chinese Journal of Rock Mechanics and Engineering, 2009, 28 (8): 1562~1570.

[11] 黄建梁, 王威中,薛宏交.坡体地震稳定性的动态分析
[J].地震工程与工程振动, 1997, 17 (4): 113~122.
Huang Jianliang, Wang Weizhong, Xue Hongjiao.Dynamic analysis of seismic stability of slopes.Earthquake Engineering and Engineering Vibration, 1997, 17 (4): 113~122.

[12] 《中国地震动参数区划图》国家标准第1号修改单(GB 18306-2001)
[S],2008.
The First Modify List of National standards of First Seismic Ground Parameter Zoning Map of China(GB 18306-2001),2008.

[13] 黄润秋, 邓荣贵.高边坡物质运动全过程模拟
[M].成都:成都科技大学出版社,1993.
Huang Runqiu,Deng Ronggui.Full-Course Numerical Simulation of High Slope Material Movement.Chengdu:Chengdu University of Science and Technology Publishing House,1993.

[14] 孙玉科、古迅. 赤平极射投影在岩体工程地质力学中的应用
[M].北京:科学出版社.1980.
Sun Yuke,Gu Xun.The Application of Stereographic Pole Overhead Projector in Rock Engineering Geomechanics.Beijing: Science Press,1980.

[15] 张管宏. 交河故城崖体稳定性及崩塌机理研究 .兰州:兰州大学,2007.
Zhang Guanhong.The Study of Stability and Collapsibility Mechanism of Cliff Mass of Jiaohe Ruins.Lanzhou: Lanzhou University, 2007.

[16] 朱飞. 常张高速公路风化岩边坡稳定性分析及加固
[J].公路与汽运, 2004, 8 (4): 51~53.
Zhu Fei.The stability analysis and support of weathering rock slope of the Chang-Zhang expressway.Highways & Automotive Applications, 2004, 8 (4): 51~53.

[17] 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.
Zhang Zuoyuan,Wang Shitian,Wang Lansheng. Analytical Principles of Engineering Geology.Beijing: Geological Publishing House,2005.

[18] 胡斌, 黄润秋.软硬互层边坡崩塌机理及治理对策研究
[J].工程地质学报, 2009, 17 (2): 200~205.
Hu Bin,Huang Runqiu. Collapse mechanism and treatment measures of slopes with interbeddings of soft and hard rocks.Journal of Engineering Geology, 2009, 17 (2): 200~205.

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