韧性岩石常规三轴压缩试验及变形与损伤演化规律研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (0 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要利用岩石全自动三轴伺服仪，对向家坝水电站坝基挤压带强风化砂岩进行不同围压下的常规三轴压缩试验，并对岩石变形和破坏机制进行研究。试验结果表明：该强风化砂岩表现出显著的非线性变形和延性破坏特征，属于韧性岩石。在偏压作用下，岩石轴向和侧向应变分别为5%和4%，体积膨胀量为4%以上。岩石变形力学参数随荷载的变化而变化，随偏应力的增大，岩石弹性模量减小，泊松比增大。围压可提高岩石抵抗变形和破坏的能力，围压越大，岩石发生扩容的起始偏应力越大。基于密度方法研究岩石损伤演化规律。加载初期，岩石被压密，处于无损阶段；当偏应力超过一定水平时，岩石出现损伤，且损伤量与等效应变呈线性关系，密度损伤阈值低于0.12。试验结果对向家坝水电站坝基稳定性分析有重要参考价值。

	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

关键词 ：岩石力学, 韧性岩石, 常规三轴试验, 弹性模量, 泊松比, 损伤演化

Abstract：The rock sample is strongly weathered sandstone which is from the compressive zone of the dam foundation of Xiangjiaba hydropower station，and the conventional triaxial experiments under different confining pressures are carried out for the rock by using automatic triaxial servo-instrument. The deformation and failure mechanism of rock are studied. The results show that the rock has significant characteristics of non-linear deformation and ductile failure，so it belongs to ductile rock. In the action of deviatoric stress，the axial and lateral strain of rock reaches 5% and 4% respectively，and the volume expansion strain reaches more than 4%.The deformation mechanical parameters of rock change with the loading. With the increase of deviatoric stress，elastic modulus of the rock decreases as well as Poisson?s ratio increases. The confining pressure enhances the rock resistance to deformation and failure. The greater the confining pressure，the larger the initial expansion deviatoric stress of rock. Based on the density method，the damage evolution of rock is discussed. At the initial loading state，the rock is compacted without damage；when the deviatoric stress exceeds a certain level，the rock damage increases as a linear relationship with the equivalent strain，and the density damage threshold is lower than 0.12. The experiment results offer important reference value to the research of stability of the dam foundation of Xiangjiaba hydropower station.

Key words： rock mechanics ductile rock conventional triaxial experiment elastic modulus Poisson?s ratio damage evolution

收稿日期: 2010-10-28

引用本文:

张治亮1，2，徐卫亚1，2，王伟1，2，王如宾1，2. 韧性岩石常规三轴压缩试验及变形与损伤演化规律研究[J]. 岩石力学与工程学报, 2011, 30(S2): 3857-3862.
ZHANG Zhiliang1，2，XU Weiya1，2，WANG Wei1，2，WANG Rubin1，2. INVESTIGATION ON CONVENTIONAL TRIAXIAL COMPRESSION TESTS OF DUCTILE ROCK AND LAW OF DEFORMATION AND DAMAGE EVOLUTION. , 2011, 30(S2): 3857-3862.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/IS2/3857

[1]	任建喜. 三轴压缩岩石损伤扩展细观机制及其本构模型[J]. 煤炭学报，2001，26(6)：578-583.(REN Jianxi. Rock meso-damage propagation law in the triaxial compression loading and its constitutive model[J]. Journal of China Coal Society，2001，26(6)：578-583.(in Chinese)) " target="_blank">
[5]	郭富利，张顶立，苏洁，等. 地下水和围压对软岩力学性质影响的试验研究[J]. 岩石力学与工程学报，2007，26(11)：2 325-2 332. (GUO Fuli，ZHANG Dingli，SU Jie，et al. Experimental study on influences of groundwater and confining pressure on mechanical behaviors of soft rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(11)：2 325-2 332.(in Chinese))
[8]	叶洲元，李夕兵，周子龙，等. 三轴压缩岩石动静组合强度及变形特征的研究[J]. 岩土力学，2009，30(7)：1 981-1 986.(YE Zhouyuan，LI Xibing，ZHOU Zhilong，et al. Static-dynamic coupling strength and deformation characteristics of rock under triaxial compression[J]. Rock and Soil Mechanics，2009，30(7)：1 981-1986. (in Chinese))
[14]	LEMAITRE J. A course on damage mechanics[M]. Berlin：Springer-Verlag，1992：29-30. " target="_blank">
[15]	杨光松. 损伤力学与复合材料损伤[M]. 北京：国防工业出版社，1995：6-12.(YANG Guangsong. Damage mechanics and composite damage[M]. Beijing：National Defense Industry Press，1995：6-12.(in Chinese)) " target="_blank">
[7]	易达，刘洁荣，葛修润. 岩石三轴压缩任意围压下应力-应变曲线的预测方法研究[J]. 岩土工程学报，2008，30(7)：1 062-1 065. (YI Da，LIU Jierong，GE Xiurun. Forecast of stress-strain curves of rock under arbitrary confining pressures in triaxial compression[J]. Chinese Journal of Geotechnical Engineering，2008，30(7)：1 062-1 065.(in Chinese))
[10]	曹文贵，张升，赵明华. 基于新型损伤定义的岩石损伤统计本构模型探讨[J]. 岩土力学，2006，27(1)：41-46.(CAO Wengui，ZHANG Sheng，ZHAO Minghua. Study on statistical damage constitutive model of rock based on new definition of damage[J]. Rock and Soil Mechanics，2006，27(1)：41-46.(in Chinese))
[12]	何满潮，景海河，孙晓明. 软岩工程力学[M]. 北京：科学出版社，2002：10-12.(HE Manchao，JING Haihe，SUN Xiaoming. Engineering mechanics of soft rock[M]. Beijing：Science Press，2002：10-12.(in Chinese)) " target="_blank">
[16]	王军. 损伤力学的理论与应用[M]. 北京：科学出版社，1997：2-3.(WANG Jun. Damage mechanics theory and application[M]. Beijing：Science Press，1997：2-3.(in Chinese)) " target="_blank">
[11]	康亚明，刘长武，贾延，等. 岩石的统计损伤本构模型及临界损伤度研究[J]. 四川大学学报：工程科学版，2009，41(4)：42-47. (KANG Yaming，LIU Changwu，JIA Yan，et al. Research on statistical damage constitutive model and critical damage for rock subjected to triaxial stress condition[J]. Journal of Sichuan University：Engineering Science，2009，41(4)：42-47.(in Chinese))
[13]	徐志英. 岩石力学[M].北京：中国水利水电出版社，1993：30-31.(XU Zhiying. Rock mechanics[M]. Beijing：China Water Power Press，1993：30-31.(in Chinese)) " target="_blank">
[3]	杨圣奇，苏承东，徐卫亚. 大理岩常规三轴压缩下强度和变形特性的试验研究[J]. 岩土力学，2005，26(3)：475-478.(YANG Shengqi，SU Chengdong，XU Weiya. Experimental investigation on strength and deformation properties of marble under conventional triaxial compression[J]. Rock and Soil Mechanics，2005，26(3)：475-478.(in Chinese))
[6]	杨根兰，黄润秋，蔡国军，等. 岩石破坏前后曲线分类及脆-延转换围压研究——蚀变岩常规三轴压缩试验I[J]. 岩土力学，2008，29(10)：2 759-2 763.(YANG Genlan，HUANG Runqiu，CAI Guojun，et al. Conventional triaxial compression test I of altered rock：study of classification of strain-stress curve before and after destruction and brittle-ductile diversion confining pressure[J]. Rock and Soil Mechanics，2008，29(10)：2 759-2 763.(in Chinese)) " target="_blank">
[9]	徐卫亚，韦立德. 岩石损伤统计本构模型的研究[J]. 岩石力学与工程学报，2002，21(6)：787-791.(XU Weiya，Wei Lide. Study on statistical damage constitutive model of rock[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(6)：787-791.(in Chinese))
[2]	李海波，张天航，邵蔚，等. 三轴压缩情况下岩石变形特征的滑移型裂纹模拟[J]. 岩石力学与工程学报，2005，24(17)：3 119-3 124. (LI Haibo，ZHANG Tianhang，SHAO Wei，et al. Simulation of deformation behavior of rock material under triaxial compression based on sliding crack model[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 119-3 124.(in Chinese))
[4]	陈景涛，冯夏庭. 高地应力下岩石的真三轴试验研究[J]. 岩石力学与工程学报，2006，25(8)：1 537-1 543.(CHEN Jingtao，FENG Xiating. True triaxial experimental study on rock with high geostress[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(8)： 1 537-1 543.(in Chinese))