脆性岩体破裂扩展时间效应对引水隧洞长期稳定性影响研究

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Abstract The time-dependent propagation of cracks was observed from the failure of field surrounding rock and the monitored data of the water diversion tunnels in Jinping and became the dominating factor of the long-term stability of the tunnel. A long-term loading test was conducted on the marble from Jinping leading to the establishment of a fitted formula for the time-dependent behavior and a threshold ratio of driving stresses. A numerical specimen based on CPM model was set up considering the transitional characteristics from brittle-ductile-plastic and a numerical test of long-term loading was performed. A full scale PFC-based model was constructed for the water diversion tunnel and the long-term stability of the tunnel with various depths and rock types was assessed. It was found that in the test the failure time varied with the loading level exponentially. The subcritical crack began to expand if only a threshold of stress level, termed as the critical ratio of driving stresses, was reached. The ratio is 0.492 for Jinping marbles. The CPM-based numerical specimen reproduced nicely the triaxial behavior and the effect of confining pressure. The growth trend of the crack numbers was notable under the lower confining stress，but less noticeable under the higher confining stress. The number of the tensile cracks remained unchanged under the higher confining stress. During the numerical test of long-term loading，the axial strain and the growth of the number of cracks were in accordance with the three stage curve of creep. As the ratios of the driving stresses decreased，the strains due to creep increased. The development of the cracks due to the stress corrosion was also in accordance with the three stage curve of creep. A smaller ratio of driving stress led to a linear growth of the number of cracks of stress-corrosion but an exponentially decreased rate of growth of it. The results of the full scale PFC simulation suggested that after 100 years，the fracture zone of the tunnel would be with the range of 2.1–3.1 m for the class II marble and 3.3–4.5 m for the class III marble. It was thus confirmed that the long-term stability of the water diversion tunnel could be guaranteed.

Key words： rock mechanics brittle rock water diversion tunnel time-dependent crack propagation particle flow code(PFC) stress corrosion

Received: 21 October 2013

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[8]	肖洪天，强天弛，周维垣. 三峡船闸高边坡损伤流变研究及实测分析[J]. 岩石力学与工程学报，1999，18(5)：497-502.(XIAO Hongtian，QIANG Tianchi，Zhou Weiyuan. Rheologic damage study of Three Gorges ship lock high slope and analysis of in-situ measured deformation[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(5)：497-502.(in Chinese))
[1]	佘诗刚，董陇军. 从文献统计分析看中国岩石力学进展[J]. 岩石力学与工程学报，2013，32(3)：442-465.(SHE Shigang，DONG Longjun. Statistics and analysis of academic publications for development of rock mechanics in China[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(3)：442-465.(in Chinese))
[5]	徐卫亚，杨圣奇，褚卫江. 岩石非线性黏弹性流变模型(河海模型)及其应用[J]. 岩石力学与工程学报，2006，25(3)：433-448.(XU Weiya，YANG Shengqi，CHU Weijiang. Nonlinear viscoelasto-plastic rheological model(Hohai model) of rock and its engineering application[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(3)：433-448.(in Chinese))
[9]	徐平，杨挺青，徐春敏，等. 三峡船闸高边坡岩体时效特性及长期稳定性分析[J]. 岩石力学与工程学报，2002，21(2)：163-169.(XU Ping，YANG Tingqing，XU Chunmin，et al. Creep characteristic and long-term stability of rock mass in ship lock high slope of the Three Gorges Project[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(2)：163-169.(in Chinese))
[10]	邓广哲，朱维申. 蠕变裂隙扩展与岩石长时强度效应实验研究[J]. 实验力学，2002，17(2)：177-184.(DENG Guangzhe，ZHU Weishen. An experiment research on the crack propagation in rock mass[J]. Journal of Experimental Mechanics，2002，17(2)：177-184.(in Chinese)) " target="_blank">
[11]	MARTIN C D，READ R S，MARTINO J B. Observation of brittle failure around a circular[J]. International Journal of Rock Mechanics and Mining Sciences，1997，37(7)：1 065-1 073. " target="_blank">
[14]	POTYONDY D O. Simulating stress corrosion with a bonded-particle model for rock[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(5)：677-691.
[19]	LAU J S O，GORSKI B，CONLON B，et al. Long-term loading tests on saturated granite and granodiorite[R]. Toronto：Ontario Power Generation Nuclear Waste Management Division，2000. " target="_blank">
[23]	周维垣. 高等岩石力学[M]. 北京：水利电力出版社，1990：138-145.(ZHOU Weiyuan. Advanced rock mechanics[M]. Beijing：Water Power Press，1990：138-145.(in Chinese)) " target="_blank">
[27]	赵延林，万文，王卫军，等. 类岩石裂纹压剪流变断裂与亚临界扩展实验及破坏机制[J]. 岩土工程学报，2012，34(6)：1 050-1 060. (ZHAO Yanlin，WAN Wen，WANG Weijun，et al. Compressive-shear rheological fracture of rock-like cracks and subcritical crack propagation test and fracture mechanism[J]. Chinese Journal of Geotechnical Engineering，2012，34(6)：1 050-1 060.(in Chinese)) " target="_blank">
[31]	Itasca Consulting Group Inc.. PFC2D(Particle flow code in 2D)，Version 4.0[R]. Minneapolis：Itasca Consulting Group Inc.，2008. " target="_blank">
[3]	孙钧，王贵君. 岩石流变力学的若干进展[C]// 中国岩石力学与工程——世纪成就. 南京：河海大学出版社，2004：123-146.(SUN Jun，WANG Guijun. Some progress on study of rock rheological mechanics[C]// Rock Mechanics and Engineering in China—the Centurial Achievements. Nanjing：Hohai University Press，2004：123-146.(in Chinese)) " target="_blank">
[7]	丁秀丽. 岩体流变特性的试验研究及模型参数辨识[博士学位论文][D]. 北京：中国科学院研究生院，2005.(DING Xiuli. Experimental study on rock mass rheological properties and identification for the constitutive mode and parameters[Ph. D. Thesis][D]. Beijng：Graduate University of Chinese Academy of Sciences，2005.(in Chinese)) " target="_blank">
[16]	高延法，范庆忠，崔希海，等. 岩石流变及其扰动效应试验研究[M]. 北京：科学出版社，2007：45-47.(GAO Yanfa，FAN Qingzhong，CUI Xihai，et al. Experimental study on rheological and disturbance effects of rock[M]. Beijing：Science Press，2007：45-47.(in Chinese)) " target="_blank">
[12]	LIN M，KICKER D，DAMJANAC B，et al. Mechanical degradation of emplacement drifts at Yucca Mountain—a modeling case study—part I：nonlithophysal rock[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(3)：351-367.
[21]	徐志英. 岩石力学[M]. 第三版. 北京：水利水电出版社，1993：127-129.(XU Zhiying. Rock Mechanics[M]. 3rd ed. Beijing：Water Power Press，1993：127-129.(in Chinese)) " target="_blank">
[25]	李江腾，曹平，袁海平. 岩石压临界裂纹扩展试验及门槛值研究[J]. 岩土工程学报，2006，28(3)：415-419.(LI Jiangteng，CAO Ping，YUAN Haiping. Study on subcritical crack growth and thresholds of rocks[J]. Chinese Journal of Geotechnical Engineering，2006，28(3)：415-419.(in Chinese))
[29]	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)) " target="_blank">
[2]	孙钧. 岩石流变力学及其工程应用研究的若干进展[J]. 岩石力学与工程学报，2007，26(6)：1 081-1 105.(SUN Jun. Rock rheological mechanics and its advance in engineering applications[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(6)：1 081- 1 105.(in Chinese)) " target="_blank">
[4]	杨圣奇. 岩石流变力学特性的研究及其工程应用[博士学位论文][D]. 南京：河海大学，2006.(YANG Shengqi. Study on rheological mechanical properties of rock and its engineering applications[Ph. D. Thesis][D]. Nanjing：Hohai University，2006.(in Chinese)) " target="_blank">
[6]	朱维申，邱祥波，李术才，等. 损伤流变模型在三峡船闸高边坡稳定分析的初步应用[J]. 岩石力学与工程学报，1997，16(5)：431-436.(ZHU Weishen，QIU Xiangbo，LI Shucai，et al. preliminary stability analysis of high slope of the Three Gorges ship lock by damage-rheology model[J]. Chinese Journal of Rock Mechanics and Engineering，1997，16(5)：431-436.(in Chinese))
[13]	LIN M，KICKER D，DAMJANAC B，et al. Mechanical degradation of emplacement drifts at Yucca Mountain—a modeling case study—part II：lithophysal rock[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(3)：368-399.
[15]	刘宁，张春生，褚卫江. 深埋大理岩破裂扩展时间效应的颗粒流模拟[J]. 岩石力学与工程学报，2011，30(10)：1 989-1 997.(LIU Ning，ZHANG Chunsheng，CHU Weijiang. Simulating time-dependent failure of deep marble with particle flow code[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(10)：1 989-1 997.(in Chinese)) " target="_blank">
[17]	SCHMIDTKE R H，LAJTAI E Z. The long-term strength of Lac du Bonnet granite[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1985，22(6)：461-465. " target="_blank">
[18]	LAU J S O，COULON B. Long-term loading tests on lac du bonnet pink granite[R]. Toronto：Atomic Energy of Canada Limited，1997. " target="_blank">
[20]	刘宁，张春生，褚卫江. 锦屏深埋大理岩破裂扩展的时间效应试验及特征研究[J]. 岩土力学，2012，33(8)：2 437-2 445.(LIU Ning，ZHANG Chunsheng，CHU Weijiang. Experimental research on time- dependent behavior of crack propagation in Jinping deep marble[J]. Rock and Soil Mechanics，2012，33(8)：2 437-2 445.(in Chinese)) " target="_blank">
[22]	尤明庆. 岩石的力学性质[M]. 北京：地质出版社，2007：36-39. (YOU Mingqing. Rock mechanical properties[M]. Beijing：Geological Publishing House，2007：36-39.(in Chinese)) " target="_blank">
[24]	许宏发，陈力新. 岩石时效特性与节理模型[M]. 上海：上海交通大学出版社，2009：26-28.(XU Hongfa，CHEN Lixin. Time dependent effect of rock and joint model[M]. Shanghai：Shanghai Jiaotong University Press，2009：26-28.(in Chinese)) " target="_blank">
[26]	肖洪天，杨若琼，周维垣. 三峡船闸花岗岩亚临界裂纹扩展试验研究[J]. 岩石力学与工程学报，1999，18(4)：447-450.(XIAO Hongtian，YANG Ruoqiong，ZHOU Weiyuan. Testing study of subcritical crack growth of granite at the Three Gorges ship lock[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(4)：447-450.(in Chinese))
[28]	朱泽奇，盛谦，冷先伦，等. 三峡花岗岩起裂机制研究[J]. 岩石力学与工程学报，2007，26(12)：2 570-2 576.(ZHU Zeqi，SHENG Qian，LENG Xianlun，et al. Study on crack initiation mechanism of Three Gorges granite[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(12)：2 570-2 576.(in Chinese)) " target="_blank">
[30]	余华中，阮怀宁，褚卫江. 大理岩脆-延-塑转换特性的细观模拟研究[J]. 岩石力学与工程学报，2013，32(1)：55-65.(YU Huazhong，RUAN Huaining，CHU Weijiang. Mesoscopic simulation studyof brittle-ductile-plastic transition character of marble[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(1)：55-65.(in Chinese))
[32]	朱焕春，褚卫江，吴家耀，等. 锦屏二级水电站引水隧洞围岩稳定及动态支护设计专题研究总结报告[R]. 杭州：浙江中科依泰斯卡岩石工程研发有限公司，2013.(ZHU Huanchun，CHU Weijiang，WU Jiayao，et al. Summary report stability of the water convey tunnels and dynamically support design of Jingping II hydropower plant[R]. Hangzhou：HydroChina-Itasca Research and Development Center，2013.(in Chinese)) " target="_blank">