拱坝坝肩岩石流变力学特性试验研究及其长期稳定性分析

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摘要采用岩石全自动三轴流变伺服仪，对小湾水电站两岸山体的蚀变岩进行三轴流变力学试验，得到岩石典型的流变全程曲线。流变试验结果表明：较高应力水平条件下，蚀变岩具有较为显著的流变特性，流变变形量大，流变速率快。基于试验结果，研究蚀变岩在不同应力水平下流变变形随时间的变化规律，分析试样的流变破裂形式与机制，掌握了蚀变岩三轴流变的基本特性。采用Cvisc流变模型对蚀变岩流变试验曲线进行辨识，得到相应的流变力学参数；基于三维非线性数值分析方法，采用黏弹塑性流变本构模型，模拟小湾水电站长期运营条件下的流变力学行为，并与弹塑性计算条件下进行对比分析。结果表明：小湾水电站拱坝及坝肩岩体长期流变变形明显大于弹塑性变形；考虑岩石流变作用使得应力场随时间增长发生重分布，局部应力集中现象有所缓解；坝肩岩体受力初期表现出较为显著的流变特性，流变一定时间后，流变速率变得恒定平稳，流变变形趋于稳定。

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	蒋昱州1
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	徐卫亚1
	王瑞红3
	王如宾1
	张治亮1

关键词 ：岩石力学, 小湾水电站, 蚀变岩, 试验研究, 坝肩岩体, 长期稳定性, 数值分析

Abstract：In order to understand the rheological properties of alteration rock specimen of two banks of Xiaowan hydropower station，triaxial compression rheological experiments on alteration rock specimens are carried out by the rock servo-controlled rheological testing machine. The test results show that the rheological properties of alteration rock are very significant，and the rheological deformation of specimens is large. Based on the triaxial rheological experimental results，the variation law of axial strains of alteration rock specimens with time is investigated. At the same time，the variation tendency of axial rheological rates under different stress levels is discussed in detail；the rheological failure mechanism is analyzed；and the triaxial rheological law of alteration rock specimen is obtained. Cvisc rheological model is used to fit the rheological test curves，and the constitutive relationships of Cvisc model and its parameters are obtained. Based on the optimal rheological model of rock，the rheological mechanical behaviors of rock mass on two banks are simulated by using 3D nonlinear numerical method. Throughout the analysis of the calculated results，the long-term stability of arch dam and abutment are estimated by studying the displacement and stress. The results show that the rheological effect of Xiaowan hydropower station is very remarkable. The rheological deformations of arch dam and two banks are larger than the elastoplastic deformations. Considering the rock rheological behavior，the stress field will redistribute with the increase in time；and the phenomenon of local stress concentration will decrease. The abutment rock mass expresses explicit rheological characteristics at the beginning of loading，and then，the rheological rate and rheological deformation of arch dam and abutment tend to stability.

Key words： rock mechanics Xiaowan hydropower station alteration rock experimental study abutment rock mass long-term stability numerical analysis

引用本文:

蒋昱州1，2，徐卫亚1，王瑞红3，王如宾1，张治亮1. 拱坝坝肩岩石流变力学特性试验研究及其长期稳定性分析[J]. 岩石力学与工程学报, 2010, 29(S2): 3699-3709.
JIANG Yuzhou1，2，XU Weiya1，WANG Ruihong3，WANG Rubin1，ZHANG Zhiliang1. EXPERIMENTAL STUDY OF RHEOLOGICAL MECHANICAL PROPERTIES OF ARCH DAM ABUTMENT ROCK AND ITS LONG-TERM STABILITY ANALYSIS. , 2010, 29(S2): 3699-3709.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2010/V29/IS2/3699

[1] Itasca Consulting Group Inc.. FLAC^3D user¢s manual(version3.0)[R]. Minneapolis：Itasca Consulting Group Inc.，2005.

[2] 孙钧. 岩土材料流变及其工程应用[M]. 北京：中国建筑工业出版社，1999.(Sun Jun. Rheological behavior of geotechnical materials and its engineering applications[M]. Beijing：China Architecture and Building Press，1999.(in Chinese))

[3] 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)：1 081–1 106.(Sun Jun. Rock rheolodical mechanics and its advance in engineering applications[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(6)：1 081– 1 106.(in Chinese))

[4] 杨圣奇，徐卫亚，杨松林. 龙滩水电站泥板岩剪切流变力学特性研究[J]. 岩土力学，2007，28(5)：895–902.(YANG Shengqi，XU Weiya，YANG Songlin. Investigation on shear rheological mechanical properties of shale in Longtan Hydropower Project[J]. Rock and Soil Mechanics，2007，28(5)：895–902.(in Chinese))

[5] 杨圣奇，徐卫亚，谢守益，等. 饱和状态下硬岩三轴流变变形与破裂机制研究[J]. 岩土工程学报，2006，28(8)：962–969.(YANG Shengqi，XU Weiya，XIE Shouyi，et al. Study on triaxial rheological deformation and failure mechanism of hard rock in saturated state[J]. Chinese Journal of Geotechnical Engineering，2006，28(8)：962–969.(in Chinese))

[6] 蒋昱州，张明鸣，李良权. 岩石非线性黏弹塑性蠕变模型研究及其参数识别[J]. 岩石力学与工程学报，2008，27(4)：832–839.(JIANG Yuzhou，ZHANG Mingming，LI Liangquan. Study on nonlinear visco- elasto-plastic creep model of rock and parameter identification[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(4)：832–839.(in Chinese))

[7] 彭守拙，窦永强. 砾岩隧洞的长期稳定性分析[J]. 岩土力学，1995，16(2)：64–73.(PENG Shouzhou，DOU Yongqiang. Long-term stability analysis of the tunnel in conglomerate[J]. Rock and Soil Mechanics，1995，16(2)：64–73.(in Chinese))

[8] 徐平，杨挺清，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)：163–168.(XU Ping，YANG Tingqing，XU Chunmin，et al. Creep characteristics 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)：163–168.(in Chinese))

[9] 陈国庆，冯夏庭，周辉，等. 锦屏二级水电站引水隧洞长期稳定性数值分析[J]. 岩土力学，2007，28(增1)：417–422.(CHEN Guoqing，FENG Xiating，ZHOU Hui，et al. Numerical analysis of the long-term stability of seepage tunnel in Jinping II Hydropower Station[J]. Rock and Soil Mechanics，2007，28(Supp. 1)：417–422.(in Chinese))

[10] 丁秀丽，付敬，刘建，等. 软硬互层边坡岩体的蠕变特性研究及稳定性分析[J]. 岩石力学与工程学报，2005，24(19)：3 410– 3 418.(DING Xiuli，FU Jing，LIU Jian，et al. Study on creep behavior of alternatively distributed soft and hard rock layers and slope stability analysis[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(19)：3 410–3 418.(in Chinese))

[11] 蒋昱州，徐卫亚，王瑞红，等. 岩石非线性损伤蠕变模型研究[J]. 中国矿业大学学报，2009，38(3)：331–335.(JIANG Yuzhou，XU Weiya，WANG Ruihong，et al. Nonlinear creep damage constitutive model of rock[J]. Journal of China University of Mining and Technology，2008，25(3)：290–296.(in Chinese))

[12] 王芝银，李云鹏，郭书太，等. 大型地下储油洞黏弹性稳定性分析[J]. 岩土力学，2005，26(11)：1 705–1 710.(WANG Zhiyin，LI Yunpeng，GUO Shutai，et al. Viscoelastic stability analysis of underground petroleum storage caverns[J]. Rock and Soil Mechanics，2005，26(11)：1 705–1 710.(in Chinese))

[13] 陈卫忠，王者超，伍国军，等.盐岩非线性蠕变损伤本构模型及其工程应用[J]. 岩石力学与工程学报，2007，26(3)：467–472.(CHEN Weizhong，WANG Zhechao，WU Guojun，et al. Nonlinear creep damage constitutive model of rock salt and its application to engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(3)：467–472.(in Chinese))