裂隙岩质边坡渗流与非连续变形耦合过程分析
HYDRO-MECHANICAL COUPLING PROCESS ON ROCK SLOPE STABILITY BASED ON DISCONTINUOUS DEFORMATION ANALYSIS AND DISCRETE FRACTURE NETWORK MODELS
查看参考文献21篇
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文摘
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裂隙岩体中的渗流-应力耦合作用是岩质边坡失稳的重要因素之一。离散裂隙网络(DFN)模型用于研究裂隙岩体渗流,具有概念简单、效率高、适用性强的优点,是研究裂隙岩体渗流问题最为有效的手段之一。非连续变形分析(DDA)方法是专门针对裂隙岩体的非连续特性提出的一种变形场求解方法,能够更加真实地刻画工程岩体。将DFN模拟和DDA方法结合起来,提出基于DDA-DFN的渗流-应力耦合模型,给出考虑裂隙渗流情况下岩体块体系统的瞬时平衡方程,用于研究裂隙岩体变形对渗流的影响和渗流-应力耦合作用下裂隙岩体的变形破坏特征。利用该耦合模型,对一大型水利水电工程边坡稳定性进行分析。结果表明,水库蓄水后,地下水大幅度抬升,渗流-应力耦合作用加剧,导致边坡裂隙岩体中的关键部位发生大变形甚至破坏,进而触发边坡的进一步失稳。实例分析验证了这种方法用于边坡稳定性分析的有效性。 |
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其他语种文摘
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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. |
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来源
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岩石力学与工程学报
,2013,32(6):1248-1256 【核心库】
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关键词
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岩石力学
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渗流-应力耦合
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非连续变形
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离散裂隙网络
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边坡稳定分析
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地址
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1.
清华大学, 水沙科学与水利水电工程国家重点实验室, 北京, 100084
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中国科学院力学研究所, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-6915 |
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学科
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建筑科学 |
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基金
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国家973计划
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国家自然科学基金资助项目
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清华大学水沙科学与水利水电工程国家重点实验室自主课题资助
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文献收藏号
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CSCD:4892373
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参考文献 共
21
共2页
|
|
1.
Terzaghi K.
Theoretical soil mechanics,1943:265-296
|
CSCD被引
10
次
|
|
|
|
|
2.
Biot M A. Consolidation settlement under a rectangular load distribution.
Journal of Applied Physics,1941,12(5):426-430
|
CSCD被引
12
次
|
|
|
|
|
3.
Louis C. Rock hydraulics.
Rock Mechanics,1974:299-387
|
CSCD被引
15
次
|
|
|
|
|
4.
周创兵. 论岩体多场广义耦合及其工程应用.
岩石力学与工程学报,2008,27(7):1329-1340
|
CSCD被引
31
次
|
|
|
|
|
5.
仵彦卿.
岩体水力学导论,1995:79-83
|
CSCD被引
1
次
|
|
|
|
|
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],2008
|
CSCD被引
1
次
|
|
|
|
|
7.
王恩志. 岩体裂隙的网络分析及渗流模型.
岩石力学与工程学报,1993,12(3):214-221
|
CSCD被引
22
次
|
|
|
|
|
8.
Shi G H.
Discontinuous deformation analysis-a new numerical model for the statics and dynamics of block system[Ph. D. Thesis],1988
|
CSCD被引
2
次
|
|
|
|
|
9.
Yeung M R.
Application of Shi's discontinuous deformation analysis to the study of rock behavior[Ph. D. Thesis],1991
|
CSCD被引
1
次
|
|
|
|
|
10.
Zhang X L. Simulation of failure process of jointed rock.
Journal of Central South University of Technology,2008,15(6):888-894
|
CSCD被引
10
次
|
|
|
|
|
11.
张国新. 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.
岩石力学与工程学报,2003,22(8):1269-1275
|
CSCD被引
36
次
|
|
|
|
|
12.
姜清辉. 三维DDA与有限元的耦合分析方法及其应用.
岩土工程学报,2006,28(8):998-1001
|
CSCD被引
12
次
|
|
|
|
|
13.
Jiang Q H. A new variational inequality formulation for unconfined seepage flow through fracture networks.
Science China:Technological Sciences,2012,55(11):3090-3101
|
CSCD被引
6
次
|
|
|
|
|
14.
Wang E Z. A dual fracture model to simulate large-scale flow through fractured rocks.
Canadian Geotechnical Journal,2002,39(6):1302-1312
|
CSCD被引
2
次
|
|
|
|
|
15.
Wang S J. Hydro-geodynamic analysis and its application.
The 2nd International Conference on Coupled T-H-M-C Processes in Geosystems,2006:14-30
|
CSCD被引
1
次
|
|
|
|
|
16.
Liu X L. Double-medium constitutive model of geological material in uniaxial tension and compression.
Applied Mathematics and Mechanics,2006,27(10):1361-1372
|
CSCD被引
2
次
|
|
|
|
|
17.
郑春梅.
基于DDA的裂隙岩体水力耦合研究[博士学位论文],2010
|
CSCD被引
2
次
|
|
|
|
|
18.
Wittke W.
Rock mechanics:theory and applications with case histories,1990:591-672
|
CSCD被引
1
次
|
|
|
|
|
19.
Long J C S. Porous media equivalents for networks of discontinuous fractures.
Water Resources Research,1982,18(3):645-658
|
CSCD被引
83
次
|
|
|
|
|
20.
Dershowitz W S. Characterizing rock joint geometry with joint system models.
Rock Mechanics and Rock Engineering,1988,21(1):21-51
|
CSCD被引
50
次
|
|
|
|
|
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