白鹤滩水电站隐晶质玄武岩力学特性及Hoek-Brown本构模型描述

doi:10.13722/j.cnki.jrme.2019.0233

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (653 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要依据白鹤滩水电站开展的室内单轴、三轴试验和声发射试验成果，探讨玄武岩峰前特征强度和峰后力学行为。玄武岩启裂强度为0.5～0.6倍峰值强度，损伤强度则与峰值强度接近，峰后具有显著的脆性性质和扩容现象，且峰后行为与围压变化近似非相关。建立Hoek-Brown本构模型中塑性流动系数与岩石剪胀角之间的换算关系，论证模型针对玄武岩峰后脆性、扩容力学行为描述的适用性。工程应用表明，围岩剪胀特性对变形稳定性条件的影响与开挖响应应力路径密切相关。在应力集中区，剪胀特性愈突出、越不利于围岩稳定，而应力松弛区缺乏扩容所需的应力条件，剪胀特性及扩容不成为变形稳定的控制性影响因素。在深埋脆性岩体地下工程实践中，建议针对不同工程部位据此制定差异化支护设计方案。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	张春生1
	朱永生1
	2
	褚卫江1
	2
	刘宁1
	2

关键词 ：岩石力学, 隐晶质玄武岩, 脆性岩石, 岩石扩容, 围压, Hoek-Brown本构模型

Abstract：Based on the results of uniaxial，triaxial and acoustic emission tests carried out on basalt at Baihetan hydropower station，the pre-peak characteristic strength and post-peak mechanical behavior of basalt are discussed. The crack initiation strength of basalt is about 0.5–0.6 times of the peak strength，while the damage strength is close to the peak strength. There are obvious brittle and dilatant behaviors during failure process，and post-peak mechanical behaviors are nearly uncorrelated with the confining pressure. The conversion relationship between the plastic flow coefficient ? in Hoek-Brown constitutive model and the rock dilatancy angle ? is established，and the applicability of Hoek-Brown model for describing post-peak brittleness and dilatancy of basalt is demonstrated. Engineering application shows that the influence of dilatancy characteristics of the surrounding rock on its stability is closely related to the stress path of excavation response. In the stress concentration area，the stronger the dilatancy is，the more unfavorable to the stability of the surrounding rock. Due to that the stress relaxation area lacks the level of concentration stress required for triggering dilatancy，dilatancy is not the critical factor of control stability. In the practice of deep-buried cavern in brittle rock mass in underground engineering，it is suggested that differential support design schemes should be formulated for side wall and vault according to mechanism of excavation response.

Key words： rock mechanics basalt brittle rock rock dilation confining stress Hoek-Brown model

引用本文:

张春生1，朱永生1，2，褚卫江1，2，刘宁1，2. 白鹤滩水电站隐晶质玄武岩力学特性及Hoek-Brown本构模型描述[J]. 岩石力学与工程学报, 2019, 38(10): 1964-1978.
ZHANG Chunsheng1，ZHU Yongsheng1，2，CHU Weijiang1，2，LIU Ning1，2. Mechanical behaviors of basalt at Baihetan hydropower station and simulation with Hoek-Brown constitutive model. , 2019, 38(10): 1964-1978.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2019.0233 或 http://www.rockmech.org/CN/Y2019/V38/I10/1964

[2]	孟国涛，樊义林，江亚丽，等. 白鹤滩水电站巨型地下洞室群关键岩石力学问题与工程对策研究[J]. 岩石力学与工程学报，2016，35(12)：2 549-2 560.(MENG Guotao，FAN Yilin，JIANG Yali，et al. Key rock mechanical problems and measures for huge caverns of Baihetan hydropower plant[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(12)：2 549-2 560.(in Chinese))
[4]	刘宁，张春生，吴旭敏，等. 锦屏二级水电站深埋大理岩破裂扩展的时间效应[J].水利水电科技进展，2013，33(2)：63-67.(LIU Ning，ZHANG Chunsheng，WU Xumin，et al. Time-dependent failure of deep-buried marble in Jinping II hydropower station[J]. Advances in Science and Technology of Water Resources，2013，33(2)：63-67.(in Chinese))
[11]	SHAH S. A study of the behaviour of jointed rock masses[Ph. D. Thesis][D]. Toronto：Department of Civil Engineering，University of Toronto，1992.
[21]	VERMEER P A，DE BORST R. Non-associated plasticity for soils，Concrete and Rock[J]. Heron，1984，29(3)：1-64.
[23]	DRUCKER D C，GIBSON R E，HENKEL D J. Soil mechanics and work hardening theories of plasticity[J]. Trans ASCE，1957，122：338-346.
[25]	Itasca Consulting Group Inc. FLAC3D User?s manual[R]. Minneapolis：Itasca Consulting Group Inc.，2015.
[1]	冯夏庭，江权，苏国韶. 高应力下硬岩地下工程的稳定性智能分析与动态优化[J]. 岩石力学与工程学报，2008，27(7)：1 341-1 352. (FENG Xiating，JIANG Quan，SU Guoshao. Challenges faced by underground projects construction safety and countermeasures[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(7)： 1 341-1 352.(in Chinese))
[3]	朱永生，朱焕春，石安池，等. 基于离散单元法的白鹤滩水电站复杂块体稳定性分析[J]. 岩石力学与工程学报，2011，30(10)：2 068- 2 075.(ZHU Yongsheng，ZHU Huanchun，SHI Anchi，et al. Complicated block stability analysis of Baihetan hydropower station based on distinct element method[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(10)：2 068-2 075.(in Chinese))
[5]	MARTIN C D. Seventeenth Canadian Geotechnical Colloquium：The effect of cohesion loss and stress path on brittle rock strength[J]. Canadian Geotechnical Journal，1997，34(5)：698-725.
[7]	DIEDERICHS M S. The 2003 Canadian Geotechnical Colloquium：Mechanistic interpretation and practical application of damage and spalling prediction criteria for deep tunnelling[J]. Canadian Geotechnical Journal，2007，44(9)：1 082-1 116.
[8]	HOEK E，BROWN T. Empirical strength criterion for rock masses[J]. Journal of Geotechnical and Geoenvironmental Engineering，ASCE，1980，106(9)：1 013-1 035.
[13]	张春生，陈祥荣，侯靖，等. 锦屏二级水电站深埋大理岩力学特性研究[J]. 岩石力学与工程学报，2010，29(10)：1 999-2 009. (ZHANG Chunsheng，CHEN Xiangrong，HOU Jing，et al. Study of mechanical behavior of deep-buried marble at Jinping II hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(10)：1 999-2 009.(in Chinese))
[6]	HAJIABDOLMAJID V，KAISER P K，MARTIN C D. Modelling brittle failure of rock[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(6)：731-741.
[15]	HUCKA V，DAS B. Brittleness determination of rocks by different methods[J]. International Journal of Rock Mechanics and Mining Sciences，Geomechanics Abstracts，1974，11(10)：389-392.
[16]	TARASOV B，POTVIN Y. Universal criteria for rock brittleness estimation under triaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences，2013，59：57-69.
[18]	范文，俞茂宏，陈立伟，等. 考虑剪胀及软化的洞室围岩弹塑性分析的统一解[J]. 岩石力学与工程学报，2004，23(19)：3 213-3 220. (FAN Wen，YU Maohong，CHEN Liwei，et al. Unified elastoplastic solution for surrounding rocks of openings with consideration of material dilatancy and softening[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(19)：3 213-3 220.(in Chinese))
[26]	HOEK E，BROWN E T. Practical estimates of rock mass strength[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(8)：1 166-1 186.
[28]	孔学位，芮勇勤，董宝弟. 岩土材料在非关联流动法则下剪胀角选取探讨[J]. 岩土力学，2009，30(11)：3 278-3 282.(KONG Xuewei，RUI Yongqin，DONG Baodi. Determination of dilatancy angle for geomaterials under non-associated flow rule[J]. Rock and Soil Mechanics，2009，30(11)：3 278-3 282.(in Chinese))
[9]	PAN X D，HUNDSON J A. A simplified three dimensional Hoek-Brown yield condition[C]// Proceedings of ISRM Symposium on Rock Mechanics and Power Plants. Ontario，Canada：Balkema Press，1988：95-103.
[12]	CUNDALL P，CARRANZA-TORRES C，HART R. A new constitutive model based on the Hoek-Brown criterion[C]// Proceedings of the 3rd International FLAC Symposium. Sudbury，Ontario，Canada：Balkema Press，2003：17-25.
[14]	张传庆，刘振江，张春生，等. 隐晶质玄武岩破裂演化及破坏特征试验研究[J]. 岩土力学，2019，40(7)：1-11.(ZHANG Chuanqing，LIU Zhenjiang，ZHANG Chunsheng，et al. Experimental study on rupture evolution and failure characteristics of aphanitic basalt[J]. Rock and Soil Mechanics，2019，40(7)：1-11.(in Chinese))
[19]	HOEK E，CARRANZA-TORRES C，CORKUM B. Hoek-Brown failure criterion-2002 edition[C]// Proceedings of NARMS-TAC Conference. Toronto：[s. n.]，2002：267-273.
[22]	ALEJANO L R，ALONSO E. Considerations of the dilatancy angle in rocks and rock masses[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(4)：481-507.
[24]	ROSCOE K H. The influence of strains in soil mechanics. Geotechnique[J]，1970，20：129-170.
[29]	HOEK E，DIEDERICHS M S. Empirical estimation of rock mass modulus[J]. International Journal of Rock Mechanics and Mining Sciences，2006，43(2)：203-215.
[10]	CARTER T，CARVALHO J，SWAN G. Towards the practical application of ground reaction curves[C]// Proceedings of Innovation Fine Design for the 21st Century. Ontario，Canada：Balkema Press，1993：151-171.
[17]	赵星光，蔡明，蔡美峰. 岩石剪胀角模型与验证[J]. 岩石力学与工程学报，2010，29(5)：970-981.(ZHAO Xingguang，CAI Ming，CAI Meifeng. A rock dilation angle model and it?s verification[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(5)：970-981.(in Chinese))
[20]	CUNDALL P，GOMEZ P，LORIG L，et al. Caving mechanics task 1 scoping study-report to the international caving study[R]. Minneapolis：Itasca Consulting Group Inc.，2005.
[27]	DETOURNAY E. Elasto-plastic model of a deep tunnel for a rock with variable dilatancy[J]. Rock Mechanics and Rock Engineering，1986，19(2)：99-108.