考虑开挖卸荷劈裂效应的脆性裂隙围岩位移预测新方法

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摘要针对中国西南地区大型地下水电站厂房高边墙洞室脆性围岩开挖卸荷过程中出现的劈裂破坏这一特殊的工程地质现象，采用直线型滑移裂纹组劈裂简化模型，运用断裂力学、能量分析和裂纹扩展等分析方法，考虑围岩中原生裂隙的存在和在应力条件改变时，原生裂隙产生次生裂纹，继而形成近似平行洞室边墙的陡倾角劈裂裂缝的作用，获得洞室周边围岩的劈裂破坏判据和反映劈裂张开性变形的围岩位移预测新方法。并将新方法应用到锦屏一级水电站地下洞室群实际工程中进行验证，其劈裂破损区和位移预测值均与工程现场监测结果具有较好的一致性。此预测方法将为类似工程优化设计和优化开挖等提供科学依据。

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关键词 ：水电工程, 地下洞室群, 高地应力, 脆性岩体, 劈裂判据, 张开性变形, 位移预测

Abstract：Splitting failure happened frequently in the brittle surrounding rock mass of underground powerhouse cavern groups in southwest of China while excavation was performed. This kind of special engineering phenomenon has obtained become more and more attentions now. Adopting the linear slippage crack groups splitting model and applying fracture mechanics，energy analysis and crack propagation，the splitting criterion of cavern rock mass and displacement forecasting method reflecting splitting opening displacement was derived. Meanwhile，the effect of intrinsic cracks propagating into macroscopical splitting cracks parallel to the side wall of caverns approximately was considered. Moreover，the forecasting method was applied to the Jinping I hydropower station underground caverns engineering in China；the splitting failure zone and forecasting displacement were coincide with the monitoring data. The new forecasting displacement method could benefit the construction of similar underground caverns.

Key words： hydropower engineering underground group caverns high geostress brittle rock mass splitting criterion opening displacement displacement forecasting

收稿日期: 2011-01-30

引用本文:

李晓静1，2，朱维申2，李术才2，杨为民2. 考虑开挖卸荷劈裂效应的脆性裂隙围岩位移预测新方法[J]. 岩石力学与工程学报, 2011, 30(7): 1445-1453.
LI Xiaojing1，2，ZHU Weishen2，LI Shucai2，YANG Weimin2. A NEW DISPLACEMENT PREDICTION METHOD OF BRITTLE JOINTED ROCK MASS CONSIDERING EXCAVATION UNLOADING SPLITTING EFFECT. , 2011, 30(7): 1445-1453.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I7/1445

[4]	王明洋，宋华，郑大亮，等. 深部巷道围岩的分区破裂机制及“深部”界定探讨[J]. 岩石力学与工程学报，2006，25(9)：1 771- 1 776.(WANG Mingyang，SONG Hua，ZHENG Daliang，et al，On mechanism of zonal disintegration within rock mass around deep tunnel and definition of “deep rock engineering”[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(9)：1 771-1 776.(in Chinese)) " target="_blank">
[19]	孙林锋. 不同地应力特征及不同屈服准则对地下洞室稳定性影响研究[硕士学位论文][M]. 济南：山东大学，2009.(SUN Linfeng. Study on the stability of the underground cavern group under the conditions of different in-situ stresses characteristics and different yield criteria[M. S. Thesis][D]. Jinan：Shandong University，2009.(in Chinese)) " target="_blank">
[1]	李仲奎，周钟，汤雪峰，等. 锦屏一级水电站地下厂房洞室群稳定性分析与思考[J]. 岩石力学与工程学报，2009，28(11)：2 167- 2 175.(LI Zhongkui，ZHOU Zhong，TANG Xuefeng，et al. Stability analysis and considerations of underground powerhouse caverns group of Jinping I hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(11)：2 167-2 175.(in Chinese)) " target="_blank">
[7]	LAJTAI E Z，CARTER B J，DUNCAN S. Mapping the state of fracture around cavities[J]. Engineering Geology，1991，31(3/4)：277-289. " target="_blank">
[11]	China Aviation Institute. Handbook of stress intensity factors[M]. Beijing：Science Press，1993：2-6. " target="_blank">
[2]	李宁，孙宏超，姚显春，等. 地下厂房母线洞环向裂缝成因分析及处理措施[J]. 岩石力学与工程学报，2008，27(3)：439-446.(LI Ning，SUN Hongchao，YAO Xianchun，et al. Cause analysis of circumferential splits in surrounding rock of bus-bar tunnels in underground powerhouses and reinforced measures[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(3)：439-446.(in Chinese))
[3]	苏国韶，冯夏庭，江权，等. 高地应力下大型地下洞室群开挖顺序与支护参数组合优化的智能方法[J]. 岩石力学与工程学报，2007，26(增1)：2 800-2 808.(SU Guoshao，FENG Xiating，JIANG Quan，et al. Intelligent method of combinatorial optimization of excavation sequence and support parameters for large underground caverns under condition of high geostress[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.1)：2 800-2 808.(in Chinese)) " target="_blank">
[12]	SONG L，LAJTAI E Z. Modeling the stress-strain diagram for brittle rock loaded in compression[J]. Mechanics of Materials，1998，30(3)：243-251. " target="_blank">
[16]	ZHU W S，LI X J，ZHANG Q B，et al. A study on sidewall displacement prediction and stability evaluations for large underground power station caverns[J]. International Journal of Rock Mechanics and Mining Sciences，2010，47(7)：1 055-1 062. " target="_blank">
[5]	HIBINO S，MOTOJMA M. Characteristic behavior of rock mass during excavation of large caverns[C]// Proceedings of the 8th International Congress on Rock Mechanics. Tokyo，Japan：[s.n.]，1995：583-586. " target="_blank">
[6]	李晓静. 深埋洞室劈裂破坏形成机制的试验和理论研究[博士学位论文][D]. 济南：山东大学，2007.(LI Xiaojing. The study on experiment and theory of splitting failure in great depth openings[Ph. D. Thesis][D]. Jinan：Shandong University，2007.(in Chinese)) " target="_blank">
[8]	KEMENY J M. A model for nonlinear rock deformation under compression due to subcritical crack growth[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1991，28(6)：459-467. " target="_blank">
[9]	MARTIN C D，CHANDLER N. The progressive fracture of Lac du Bonnet granite[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1994，31(6)：643-659. " target="_blank">
[10]	缪协兴，安里千. 岩(煤)壁中滑移裂纹扩展的冲击矿压模型[J]. 中国矿业大学学报，1999，28(2)：113-117.(MIAO Xiexing，AN Liqian. Model of rockburst for extension of slip fracture in palisades[J]. Journal of China University of Mining and Technology，1999，28(2)：113-117.(in Chinese)) " target="_blank">
[13]	DYSKIN A V，GERMANOVICH L N. Model of rockbrust caused by cracks growing near free surface[C]// YOUNG P ed. Rockbursts and Seismicity in Mines 93. Rotterdam：Balkema，1993：169-175. " target="_blank">
[14]	陈赛超，董燕君，鲁晓明，等. 锦屏一级水电站引水发电系统及地下厂房安全监测专题报告[R]. 锦屏：锦屏建设管理局锦屏一级安全监测管理中心，2009.(CHEN Saichao，DONG Yanjun，LU Xiaoming，et al. Special report on the safety monitoring for the water supply and power generation system and the underground powerhouse of Jinping I hydropower project[R]. Jinping：Jinping I Safety Monitoring and Management Center of Jinping Construction Bureau，2009.(in Chinese)) " target="_blank">
[15]	赖勇，张永兴. 岩体微裂纹密度确定方法及应用[J]. 土木建筑与环境工程，2009，31(2)：51-56.(LAI Yong，ZHANG Yongxing. Methods of rock crack density determination and their application[J]. Journal of Civil，Architectural and Environmental Engineering，2009，31(2)：51-56.(in Chinese)) " target="_blank">
[17]	LI X J，ZHU W S，YANG W M. A new forecast method of opening displacement and its engineering application[C]// Proceedings of the 43rd U.S. Rock Mechanics Symposium. [S.l.]：[s.n.]，2009：167-171. " target="_blank">
[18]	LI X J， ZHU W S， YANG W M. A splitting failure criterion of surrounding rock mass in depth and high in-situ stress region and its engineering application[C]// Proceedings of the International Young Scholars? Symposium on Rock Mechanics. [S.l.]：[s.n.]，2008：1 125- 1 129. " target="_blank">