基于有限元方法的裂隙岩体等效强度参数研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (0 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The equivalent strength parameters of fractured rock masses are prerequisite to stability analysis of geotechnical engineering projects constructed in fractured rock masses which are encountered frequently in west China. Based on generated mesh of fractured rock masses，combined with statistic damage constitutive model of intact rock and damage model of structural plane，progressive failure of fractured rock masses is studied using finite element method(FEM). Furthermore，scale effect and anisotropy of compressive strength of fractured rock masses are studied. Study results show that the strength decreases and tends towards stability rapidly from intact rock to fractured rock masses，and the anisotropy of strength of fractured rock masses is not significant. At last，based on numerical simulation conducted on 10 m scale rock masses under different confining pressures，the equivalent strength parameters of fractured rock masses are gained and the results are compared with Hoek-Brown criteria. The method developed is helpful for determination of strength parameters of fractured rock masses.

Key words： rock mechanics fractured rock mass equivalent strength parameters finite element method scale effect anisotropy

Received: 31 March 2011

	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/Y2011/V30/IS2/4002

[1] 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. [2] MIN K B，JING L. Numerical determination of the equivalent elastic compliance tensor for fractured rock masses using the distinct element method[J]. International Journal of Rock Mechanics and Mining Sciences，2003，40(6)：795–816. [3] SITHARAM T G，LATHA G M. Simulation of excavations in jointed rock masses using a practical equivalent continuum approach[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(4)：517–525. [4] JING L. Formulation of discontinuous deformation analysis(DDA)—an implicit discrete element model for block systems[J]. Engineering Geology，1998，49(3/4)：371–381. [5] HART R D. Comprehensive rock engineering[M]. Oxford：Pergamon Press，1993：245–261. [6] BIENIAW SKI Z T. Determining rock mass deformability： experience from case histories[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1978，15(5)：237–247. [7] HOEK E，BROWN E T. Practical estimates of rock mass strength[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(8)：1 165–1 186. [8] BARTON N. Some new Q-value correlations to assist in site characterisation and tunnel design[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(2)：185–216. [9] PALMSTROM A. Characterizing rock masses by the RMi for use in practical rock engineering，part 2：some practical applications of the rock mass index(RMi)[J]. Tunnelling and Underground Space Technology，1996，11(3)：287–303. [10] 贺少辉. 地下工程[M]. 北京：清华大学出版社，2006：45–50.(HE Shaohui. Underground engineering[M]. Beijing：Tsinghua University Press，2006：45–50.(in Chinese)) [11] FOSSUM A F. Effective elastic properties for a randomly jointed rock mass[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1985，22(6)：467–470. [12] GERRARD C M. Elastic models of rock masses having one，two and three sets of joints[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1982，19(1)：15–23. [13] HU K X，HUANG Y. Estimation of the elastic properties of fractured rock masses[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1993，30(4)：381–394. [14] SINGH B. Continuum characterization of jointed rock masses：part I—the constitutive equations[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1973，10(4)：311–335. [15] KULATILAKE P H S W，WANG S，STEPHANSSON O. Effect of finite size joints on the deformability of jointed rock in three dimensions[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1993，30(5)：479–501. [16] POUYA A，GHOREYCHI M. Determination of rock mass strength properties by homogenization[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2001，25(13)：1 285– 1 303. [17] 张宜虎. 岩体等效水力学参数研究[博士学位论文][D]. 武汉：中国地质大学，2006.(ZHANG Yihu. Research on the equivalent hydro- mechanical parameters of rock mass[Ph. D. Thesis][D]. Wuhan：China University of Geosciences，2006.(in Chinese)) [18] MIN K B，JING L. Stress dependent mechanical properties and bounds of Poisson?s ratio for fractured rock masses investigated by a DFN-DEM technique[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(Supp.1)：390–395. [19] 周志芳. 裂隙介质水动力学原理[M]. 北京：高等教育出版社，2007：10–11.(ZHOU Zhifang. Theory on dynamics of fluids in fractured medium[M]. Beijing：Higher Education Press，2007：10–11.(in Chinese)) [20] 杨建平，陈卫忠，戴永浩. 裂隙岩体变形模量尺寸效应研究I：FEM有限元法[J]. 岩土力学，2011，32(5)：1 538–1 545.(YANG Jianping，CHEN Weizhong，DAI Yonghao. Scale effect study of deformation modulus for fractured rock mass—part I：Finite element method method[J]. Rock and Soil Mechanics，2011，32(5)：1 538–1 545.(in Chinese)) [21] YANG J P，CHEN W Z. Study of statistic damage constitutive model for shear failure rock[J]. Materials Research Innovations. 2011，15：565–568. [22] 杨建平. 裂隙岩体宏观力学参数评价研究[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2009.(YANG Jianping. Study of macro mechanical parameters of fractured rock mass[Ph. D. Thesis][D]. Wuhan： Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2009.(in Chinese)) [23] HKS Company. ABAQUS analysis user?s manual[R]. [S.l.]：HKS Company，2004. [24] 中国水电顾问集团华东勘测设计研究院. 雅砻江锦屏二级水电站可行性研究报告——3工程地质[R]. 杭州：中国水电顾问集团华东勘测设计研究院，2005：276–277.(East China Investigation and Design Institute under CHECC. Feasibility study report of Jinping II Hydropower Station—engineering geology[R]. Hangzhou：East China Investigation and Design Institute under CHECC，2005：276–277.(in Chinese)) [25] 中国水利水电科学研究院，水利水电规划设计总院，水利电力情报研究所，等. 岩石力学参数手册[M]. 北京：中国水利水电出版社，1991：469–415.(China Institute of Water Resources and Hydropower Research，Water Resources and Hydropower Planning and Design General Institute，Scientific and Technical Information Institute of Water Resources and Hydropower，et al. Manual of mechanical parameters of rock[M]. Beijing：China Water Power Press，1991：469–415.(in Chinese)) [26] 蔡美峰，何满潮，刘东燕. 岩石力学与工程[M]. 北京：科学出版社，2002：104–108.(CAI Meifeng，HE Manchao，LIU Dongyan. Rock mechanics and engineering[M]. Beijing：Science Press，2002：104–108.(in Chinese)) [27] 张伟，周国庆，张海波，等. 倾角对裂隙岩体力学特性影响试验模拟研究[J]. 中国矿业大学学报，2009，38(1)：30–33.(ZHANG Wei，ZHOU Guoqing，ZHANG Haibo，et al. Experimental research on the influence of obliquity on the mechanical characteristics of a fractured rock mass[J]. Journal of China University of Mining and Technology，2009，38(1)：30–33.(in Chinese)) [28] HOEK E. Practical rock engineering[M/oL]. 2007. http：// www. rocscience. com.