残余强度阶段大理岩流变特性试验研究

doi:10.13722/j.cnki.jrme.2015.1150

Abstract
Figure/Table
References (20)
Related Citation (15)

Download: PDF (2625 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract The diversion tunnel of Jinping II hydropower station contains marble and has large burial depth and high geostress，which give rise to the marble has prominent rheological phenomenon. Part of the engineering rock mass is in residual strength stage，so it is significant to understand the rheological characteristic of marble being in residual strength stage. Triaxial creep tests were carried out for the marble samples which had experienced triaxial compressive full tests. Based on the tests，the creep characteristic and long-term strength of the marble being in residual strength stage were systematically discussed. The study showed that the marble has transient deformation，decelerating creep stag and steady-state creep stage with different confining pressure. Attribute to a plenty of fractures，for the marble being in residual strength stage，the capacity of transient deformation and creep deformation is heavy stronger than that of the intact marble. The whole creep deformation and the steady creep speed increase with deviatoric stress. Furthermore，long-term strength of marble，less than instantaneous strength，improve when confining pressure increasing. Due to the weakening in the creep process，the samples mostly do not have cohesion and the frictional angle enhance，compared with the samples which had gone through triaxial compressive full tests but not creep tests. Therefore，it is reasonable to disregard the cohesion in significant engineering. Eventually，based on the creep characteristics of the marble，the Burgers model was treated as theoretical model to fit the processed creep curves，the parameters were obtained by Levenberg-Marquardt algorithm. At the same time，the evolution of the parameters of the Burgers model also were discussed. The research showed that the Burgers model has a perfect agreement with experiment data，which fully reflects the rheological characteristic of the marble being in residual strength stage. Moreover，for the marble being in residual strength stage，the parameters of the Burgers model exhibit the characters of nonlinear. With the deviatoric stress increasing，elastic modulusand viscous coefficientdecrease and viscoelastic shear modulusand viscoelastic coefficientincrease at first and then decrease.

Key words： rock mechanics marble residual strength stage rheological characteristic long-term strength Burgers model

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LIU Zhiyong1
	2
	ZHUO Li1
	2
	XIAO Mingli1
	2
	XIE Hongqiang1
	2
	HE Jiangda1
	2

Cite this article:

LIU Zhiyong1,2,ZHUO Li1, et al. Testing study of rheological characteristic of marble being in residual strength stage[J]. , 2016, 35(S1): 2843-2852.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1150 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/2843

[1]	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)：962-968.(YANG Shengqi，XU Weiya，XIE Shouyi，et al. Studies on triaxial rheological deformation and failure mechanismof hard rock in saturated state[J]. Chinese Journal of Geotechnical Engineering，2006，28(8)：962-968.(in Chinese))
[2]	李化敏，李振华，苏承东. 大理岩蠕变特性试验研究[J]. 岩石力学与工程学报，2004，23(22)：3 745-3 749.(LI Huamin，LIZhenhua，SUChengdong. Testing study on creep characteristics of marble[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(22)：3745-3749.(in Chinese))
[3]	徐平，杨挺青. 岩石流变试验与本构模型辨识[J]. 岩石力学与工程学报，2001，20(增1)：1739-1744.(XUPing，YANGTingqing. Current research on the rheological test and model identification of rock[J]. Chinese Journal of Rock Mechanics and Engineering，2001，20(Supp.1)：1739-1744.(in Chinese))
[4]	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)：1 999-2 008. (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)：1 999-2 008.(in Chinese))
[5]	张明，毕忠伟，杨强，等. 锦屏一级水电站大理岩蠕变试验与流变模型选择[J]. 岩石力学与工程学报，2010，29(8)：1532-1537.(ZHANG Ming，BI Zhongwei，YANG Qiang，et al. Creep test and rheological model selection of marbleof Jinping I hydropower station[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(8)：1532-1537.(in Chinese))
[6]	朱杰兵，汪斌，邬爱清，等. 锦屏水电站大理岩卸荷条件下的流变试验及本构模型研究[J]. 固体力学学报，2008，29(增1)：99-106.(ZHU Jiebing，WANG Bin，WU Aiqing，et al. Study on rheological experiment and constitutive modelof Jinping hydropower marble under unloading condition[J]. Chinese Journal ofSolid Mechanics，2008，29(Supp.1)：99-106.(in Chinese))
[7]	徐慧宁，庞希斌，徐进，等. 粉砂质泥岩的三轴蠕变试验研究[J]. 四川大学学报：工程科学版，2012，44(1)：69-74.(XU Huining，PANG Xibin， XU Jing，et al. Study on triaxial creep test of silty mudstone[J]. Journal of Sichuan University：Engineering Science Edition，2012，44(1)：69-74.(in Chinese))
[8]	MARANINI E，YAMAGUCHI T. A non-associated viscoplasticmodel for the behaviour of granite in triaxialcompression[J]. Mechanics of Materials，2001，33(5)：283-293.
[9]	BOUKHAROVG G N，CHANDA M W，BOUKHAROV N G. The three processes of brittle crystalline rock creep[J].International Journal of Rock Mechanics and MiningSciences and Geomechanics Abstracts，1995，32(4)：325-335.
[10]	HOLCOMB D J，MARTIN R J. Determining peak stresshistory using acoustic emissions[C]//ASHWORTH E，BALKEMA A A. Proceedings of 26th U.S. Symposiumon Rock Mechanics. Rotterdam：[s. n.]，1985：715-722.
[11]	MARTIN C D，CHANDLER N A. The progressivefracture of Lac du Bonnet granite[J]. InternationalJournal of Rock Mechanics and Mining Sciences，1994，31(6)：643-659.
[12]	孙金山，陈明，姜清辉，等. 锦屏大理岩蠕变损伤演化细观力学特征的数值模拟研究[J]. 岩土力学，2013，34(12)：3601-3608.(SUN Jinshan，CHEN Ming，JIANG Qinghui，et al. Numerical simulation of mesomechanical characteristics of creep damage evolution for Jingping marble[J]. Rock and Soil Mechanics，2013，34(12)：3 601-3 608.(in Chinese))
[13]	沈明荣，张清照. 绿片岩软弱结构面的剪切蠕变特性研究[J].岩石力学与工程学报，2010，29(6)：1149-1155.(SHEN Mingrong，ZHANG Qingzhao. Study of shear creep characteristics of greenschistdiscontinuities[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(6)：1149-1155.(in Chinese))
[14]	王永岩，齐珺，杨彩虹，等. 深部岩体非线性蠕变规律研究[J].岩土力学，2005，26(1)：117-121.(WANG Yongyan，QI Jun，YANG Caihong，et al. A study of nonlinear creep law in deep rocks[J]. Rock and Soil Mechanics，2005，26(1)：117-121.(in Chinese))
[15]	EDELBRO C. Numerical modeling of observed fallouts in hard rockmasses using an instantaneous cohesion-softening friction- hardeningmodel[J]. Tunneling and Underground Space Technology，2009，24(1)：398-409.
[16]	许宏发. 软岩强度和弹模的时间效应研究[J]. 岩石力学与工程学报，1997，16(3)：246-251.(XU Hongfa. Time dependent behaviours of strength andelasticity modulus of weak rock[J]. Chinese Journal of Rock Mechanics and Engineering，1997，16(3)：246-251.(in Chinese))
[17]	陈芳，张强勇，杨文东，等. 坝区辉绿岩体的长期剪切流变强度分析研究[J]. 四川大学学报：工程科学版，2011，43(6)：91-97.(CHEN Fang，ZHANG Qiangyong，YANG Wendong，et al. Analysis and research of long-term shear rheology strength of dam zone diabase[J]. Journal of Sichuan University：Engineering Science Edition，2011，43(6)：91-97.(in Chinese))
[18]	MARTIN C D. The strength of massive Lac du Bonnet granite aroundunderground openings[Ph. D. Thesis][D]. Manitoba：University of Manitoba，1993.
[19]	徐卫亚，杨圣奇，褚卫江. 岩石非线性黏弹塑性流变模型(河海模型)及其运用[J]. 岩石力学与工程学报，2006，25(3)：433-447.(XU Weiya，YANG Shengqi，CHU Weijiang. Nonlinear viscoelasto-plasticrheological model(Hohai model) of rock and its engineering application[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(3)：433-447.(in Chinese))
[20]	闫子舰，夏才初，李宏哲，等. 分级卸荷条件下锦屏大理岩流变规律研究[J]. 岩石力学与工程学报，2008，27(10)：2153-2159.(YAN Zhijian，XIA Caichu，LI Hongzhe，et al. Study on rheological rules of marble in Jinpinghydropower station under condition of stepunloading[J].Chinese Journal of Rock Mechanics and Engineering，2008，27(10)：2153-2159. (in Chinese))