裂隙岩质边坡渗流与非连续变形耦合过程分析

Abstract
Figure/Table
References
Related Citation (1)

Download: PDF (667 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Hydro-mechanical coupling in fractured rock mass is one of the key factors controlling rock slope stability. In this paper，discrete fracture network(DFN) model is used to study fluid flow in fractured rock mass. The DFN has a simple concept with high efficiency and applicability，and it is one of the most effective means to study the fracture seepage problem. Discontinuous deformation analysis(DDA)，proposed specifically for the discontinuous nature of the fractured rock mass deformation calculations，is applicable to more realistic characterization of engineering rock mass. Combining DFN simulation and DDA，the hydro-mechanical coupling model is proposed；and instantaneous equilibrium equations of rock block system considering fracture seepage，which are used to research the effects of fractured rock mass deformation on fracture seepage and the failure characteristics of rock mass under hydro-mechanical coupling，are presented. By the proposed coupling model，stability of a slope near a large water reservoir is analyzed. Simulated results show that groundwater uplifts greatly with the reservoir impoundment；and hydro-mechanical coupling is intensified，which leads to some key parts of the fractured rock slope present large deformation or even damage，further triggering the failure of the slope. The case study verifies the effectiveness of the coupling model applied for slope stability analysis.

Key words： rock mechanics hydraulic-mechanical coupling discontinuous deformation analysis(DDA) discrete fracture network(DFN) slope stability analysis

Received: 11 January 2013

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/Y2013/V32/I6/1248

[1]	TERZAGHI K. Theoretical soil mechanics[M]. New York：John Wiley and Sons，Inc.，1943：265-296. " target="_blank">
[2]	BIOT M A. Consolidation settlement under a rectangular load distribution[J]. Journal of Applied Physics，1941，12(5)：426-430. " target="_blank">
[3]	LOUIS C. Rock hydraulics[C]// MULLER L ed. Rock Mechanics. Vienna：Springer-Verlag，1974：299-387. " target="_blank">
[4]	周创兵，陈益峰，姜清辉，等. 论岩体多场广义耦合及其工程应用[J]. 岩石力学与工程学报，2008，27(7)：1 329-1 340.(ZHOU Chuangbing，CHEN Yifeng，JIANG Qinghui，et al. On generalized multi-field coupling for fractured rock masses and its applications to rock engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(7)：1 329-1 340.(in Chinese))
[5]	仵彦卿，张倬元. 岩体水力学导论[M]. 成都：西南交通大学出版社，1995：79-83.(WU Yanqing，ZHANG Zhuoyuan. An introduction to rock mass hydraulics[M]. Chengdu：Southwest Communication University Press，1995：79-83.(in Chinese)) " target="_blank">
[6]	刘晓丽. 水岩耦合过程及其多尺度行为的理论与应用研究[博士学位论文][D]. 北京：清华大学，2008.(LIU Xiaoli. Research on theory and application of water-rock coupled processes and the multi-scale behavior[Ph. D. Thesis][D]. Beijing：Tsinghua University，2008.(in Chinese)) " target="_blank">
[7]	王恩志. 岩体裂隙的网络分析及渗流模型[J]. 岩石力学与工程学报，1993，12(3)：214-221.(WANG Enzhi. Network analysis and seepage model of fractures in rock masses[J]. Chinese Journal of Rock Mechanics and Engineering，1993，12(3)：214-221.(in Chinese))
[8]	SHI G H. Discontinuous deformation analysis—a new numerical model for the statics and dynamics of block system[Ph. D. Thesis][D]. Berkeley：University of California，1988. " target="_blank">
[9]	YEUNG M R. Application of Shi′s discontinuous deformation analysis to the study of rock behavior[Ph. D. Thesis][D]. Berkeley：University of California，1991. " target="_blank">
[10]	ZHANG X L，JIAO Y Y，ZHAO J. Simulation of failure process of jointed rock[J]. Journal of Central South University of Technology，2008，15(6)：888-894.
[11]	张国新，武晓峰. 裂隙渗流对岩石边坡稳定的影响——渗流、变形耦合作用的DDA法[J]. 岩石力学与工程学报，2003，22(8)：1 269- 1 275.(ZHANG Guoxin，WU Xiaofeng. Influence of seepage on the stability of rock slope-coupling of seepage and deformation by DDA method[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(8)：1 269-1 275.(in Chinese)) " target="_blank">
[12]	姜清辉，周创兵，罗先启，等. 三维DDA与有限元的耦合分析方法及其应用[J]. 岩土工程学报，2006，28(8)：998-1 001.(JIANG Qinghui，ZHOU Chuangbing，LUO Xianqi，et al. Coupling method of three-dimensional DDA-FEM and its application[J]. Chinese Journal of Geotechnical Engineering，2006，28(8)：998-1 001.(in Chinese))
[13]	JIANG Q H，YE Z Y，YAO C，et al. A new variational inequality formulation for unconfined seepage flow through fracture networks[J]. Science China：Technological Sciences，2012，55(11)：3 090-3 101. " target="_blank">
[14]	WANG E Z，YUE Z Q. A dual fracture model to simulate large-scale flow through fractured rocks[J]. Canadian Geotechnical Journal，2002，39(6)：1 302-1 312. " target="_blank">
[15]	WANG S J，LIU X L，WANG E Z. Hydro-geodynamic analysis and its application[C]// The 2nd International Conference on Coupled T-H-M-C Processes in Geosystems. [S. l.]：[s. n.]，2006：14-30. " target="_blank">
[16]	LIU X L，WANG S J，WANG E Z，et al. Double-medium constitutive model of geological material in uniaxial tension and compression[J]. Applied Mathematics and Mechanics，2006，27(10)：1 361-1 372. " target="_blank">
[17]	郑春梅. 基于DDA的裂隙岩体水力耦合研究[博士学位论文][D]. 济南：山东大学，2010.(ZHENG Chunmei. Study on hydraulic-mechanical coupling of fractured rock mass based on DDA[Ph. D. Thesis][D]. Jinan：Shandong University，2010.(in Chinese)) " target="_blank">
[18]	WITTKE W. Rock mechanics：theory and applications with case histories[M]. Berlin：Springer-Verlag，1990：591-672. " target="_blank">
[19]	LONG J C S，REMER J S，WILSON C R，et al. Porous media equivalents for networks of discontinuous fractures[J]. Water Resources Research，1982，18(3)：645-658. " target="_blank">
[20]	DERSHOWITZ W S，EINSTEIN H H. Characterizing rock joint geometry with joint system models[J]. Rock Mechanics and Rock Engineering，1988，21(1)：21-51. " target="_blank">
[21]	薛娈鸾，陈胜宏. 岩石裂隙渗流与法向应力耦合的复合单元模型[J]. 岩石力学与工程学报，2007，26(增1)：2 613-2 619.(XUE Luanluan，CHEN Shenghong. Composite element model of seepage- normal stress coupling for rock fractures[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：2 613-2 619.(in Chinese))