基于破裂度的堆积层滑坡危险性分析方法

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Abstract Basic characteristics for development of surface cracks and state of slip surface during landslide disaster is studied，and relationship between surface cracks and internal fracture state is established. Continuum-based discrete element method(CDEM) is briefly introduced. Through simulation of specific and typical landslides with CDEM，relativity of strength and surface cracks is discussed and maximum number of surface cracks is found. Maximum number of slip surface cracks is defined as the number of cracks on slip surface which is already running through. The concept of fracture degree of surface and fracture degree of slip surface are proposed，which are defined as the ratio of current number of cracks to maximum number of cracks on surface and slip surface respectively. Numerical experiments show that there is a specific corresponding relationship between fracture degree of surface and state of slip surface，which could directly describe the risk of a geological body. Result shows that fracture degree does not rely on mesh division when calculation accuracy is guaranteed，which indicates that it is feasible to use this new method based on fracture degree and CDEM to evaluate the risk of a landslide.

Key words： engineering geology landslide facture degree surface crack continuum-based discrete element method(CDEM)

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	Articles by authors
	LI Shihai
	ZHOU Dong
	LIU Tianping

Cite this article:

LI Shihai,ZHOU Dong,LIU Tianping. RISK ANALYSIS METHOD OF ACCUMULATED LANDSLIDE BASED ON FRACTURE DEGREE[J]. , 2013, 32(s2): 3909-3917.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3909

[1]	李世海，刘天苹，刘晓宇. 论滑坡稳定性分析方法[J]. 岩石力学与工程学报，2009，28(增2)：3309-3324.(LI Shihai，LIU Tianping，LIU Xiaoyu. Analysis method for landslide stability[J]. Chinese Journalof RockMechanics and Engineering，2009，28(Supp.2)：3309-3324.(in Chinese))
[2]	DUNCAN J M. State of the art：limit equilibrium and finite-element analysis of slopes[J]. Journal of Geotechnical Engineering，1996，22(7)：577-596.
[3]	陈祖煜，弥宏亮，汪小刚.边坡稳定三维分析的极限平衡方法[J]. 岩土工程学报，2001，23(5)：525-529.(CHEN Zuyu，MI Hongliang，WANG Xiaogang.A three-dimensional limit equilibrium method for slope stability analysis[J].Chinese Journal of Geotechnical Engineering，2001，23(5)：525-529.(in Chinese))
[4]	张均锋，丁桦.边坡稳定性的三维极限平衡分析方法及应用[J].岩石力学与工程学报，2005，24(3)：365-370.(ZHANG Junfeng，DING Hua.Generalized 3D limit equilibrium method for slope stability analysis and its application[J].Chinese Journal of Rock Mechanics and Engineering，2005，24(3)：365-370.(in Chinese))
[5]	刘金龙，栾茂田，赵少飞，等.关于强度折减有限元方法中边坡失稳判据的讨论[J].岩土力学，2005，26(8)：1345-1348.(LIU Jinlong，LUANMaotian，ZHAO Shaofei，et al.Discussion on criteria for evaluating stability of slope in elastoplastic FEM based on shear strength reduction technique[J].Rock and Soil Mechanics，2005，26(8)：1345-1348.(in Chinese))
[6]	郑颖人，赵尚毅.有限元强度折减法在土坡与岩坡中的应用[J].岩石力学与工程学报，2004，23(19)：3381-3388.(ZHENG Yingren，ZHAO Shangyi.Application of strength reduction FEM in soil and rock slope[J].Chinese Journal of Rock Mechanics and Engineering，2004，23(19)：3381-3388.(in Chinese))
[7]	郑颖人，赵尚毅，邓楚键，等.有限元极限分析法发展及其在岩土工程中的应用[J]. 中国工程科学，2006，12(8)：39-61.(ZHENG Yingren，ZHAO Shangyi，DEDG Chujian，et al. Development of finite element limit analysis method and its applications in geotechnical engineering[J]. Engineering Science，2006，12(8)：39-61.(in Chinese))
[8]	郑孝玉.滑坡预报研究方法综述[J]. 世界地质，2002，19(4)：370-374. (ZHENG Xiaoyu. Summary on the Methods of Prediction to Landslide[J]. World Geology，2002，19(4)：370-374.(in Chinese))
[9]	CUNDALL P A. The measurement and analysis of acceleration in rock slopes[Ph. D. Thesis][D]. London：University of London，1971.
[10]	王泳嘉，邢纪波.离散元法及其在岩土力学中的应用[M]. 沈阳：东北工学院出版社，1991：1-7.(WANG Yongjia，XING Jibo.Distinct element method and its applications to geotechnical engineering[M]. Shenyang：Northeast University of Technology Press，1991：1-7.(in Chinese))
[11]	刘凯欣，高凌天.离散元法研究的评述[J]. 力学进展，2003，33(4)：483-490.(LIU Kaixin，GAO Lingtian. A review on the discrete element method[J]. Advances in Mechanics，2003，33(4)：483-490.(in Chinese))
[12]	LI SH，ZHAO MH，WANG YN，et al. A new numerical method for dem-block and particle model[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(3)：436-436.
[13]	LI SH，LIU XY，LIU TP，et al. Continuum-based discrete element method and its applications[M]. Beijing：[s.n.]，2008：147-170.