|
|
|
| STUDY OF MECHANICAL PROPERTIES AND LONG-TERM STRENGTH OF JINPING GREEN SCHIST |
| ZHANG Qingzhao1，2，SHEN Mingrong1，2，DING Wenqi1，2 |
| (1. School of Civil Engineering，Tongji University，Shanghai 200092，China；2. Department of Geotechnical Engineering，Tongji University，Shanghai 200092，China) |
|
|
|
|
Abstract A series of conventional mechanical laboratory tests such as uniaxial compression tests and triaxial compression tests were carried out to analyze mechanical properties of green schist in Jinping II hydropower station. Based on the analysis of conventional test results，uniaxial and triaxial rheological tests of green schist were designed and completed successfully. On the basis of the testing data obtained，the long-term strength of green schist were analyzed by transition creep law. Through the analysis，we could find that the long-term strength of green schist is about 80% of instantaneous strength. Moreover，through analyzing the shortcomings of transition creep law，and combining the achievement of creep tests，a new quantitative analysis method of long-term strength was proposed and applied to the analysis of long-term strength，so as to offer a meaningful viewpoint.
|
|
Received: 12 April 2012
|
|
|
|
| [1] 何满潮，谢和平，彭苏萍，等. 深部开采岩体力学研究[J]. 岩石力学与工程学报，2005，24(16)：2 803–2 813.(HE Manchao，XIE Heping，PENG Suping，et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 803–2 813.(in Chinese))
[2] 赵永辉，何之民，沈明荣. 润扬大桥北锚碇岩石流变特性的试验研究[J]. 岩土力学，2003，24(4)：583–586.(ZHAO Yonghui，HE Zhimin，SHEN Mingrong. Test study on rheological characteristics of the north anchor-chamber structure of Runyang suspension bridge[J]. Rock and Soil Mechanics，2003，24(4)：583–586.(in Chinese))
[3] 刘 雄. 岩石流变学概论[M]. 北京：地质出版社，1994：180–210. (LIU Xiong. Introduction to rheology of rocks[M]. Beijing：Geological Publishing House，1994：180–210.(in Chinese))
[4] 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)：1 149–1 155.(SHEN Mingrong，ZHANG Qingzhao. Study on the shear creep characteristic of green schist discontinuity[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(6)：1 149–1 155.(in Chinese))
[5] HELAL H，HOMAND-ETIENNE F，JOSIEN J P. Validity of uniaxial compression tests for indirect determination of long term strength of rocks[J]. Geotechnical and Geological Engineering，1988，6(3)：249–257
[6] 沈明荣，朱银桥. 规则齿形结构面的蠕变特性试验研究[J]. 岩石力学与工程学报，2004，23(2)：223–226.(SHEN Mingrong，ZHU Yinqiao. Test study on creep characteristics of regular teeth-shaped structure interfaces[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(2)：223–226.(in Chinese))
[7] 周宏伟，谢和平，左建平. 深部高地应力下岩石力学行为研究进展[J]. 力学进展，2005，35(1)：91–99.(ZHOU Hongwei，XIE Heping，ZUO Jianwei. Developments in researches on mechanical behaviors of rocks under the condition of high ground pressure in the depths[J]. Advances in Mechanics，2005，35(1)：91–99.(in Chinese))
[8] 徐卫亚，杨圣奇. 节理岩石剪切流变特性试验与模型研究[J]. 岩石力学与工程学报，2005，24(增2)：5 536–5 542.(XU Weiya，YANG Shengqi. Test study on shear rheological behavior of jointed rock mass and the model investigations[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(Supp.2)：5 536–5 542.(in Chinese))
[9] 王明洋，周泽平，钱七虎. 深部岩体的构造和变形与破坏问题[J].岩石力学与工程学报，2006，25(3)：448–455.(WANG Mingyang， ZHOU Zeping，QIAN Qihu. Tectonic，deformation and failure problems of deep rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(3)：448–455.(in Chinese))
[10] 刘晶辉，王山长，杨洪海. 软弱夹层流变试验长期强度确定方法[J]. 勘察科学技术，1996，(5)：3–7.(LIU Jinghui，WANG Shanchang，YANG Honghai. Method to determine the rheological test long-term strength for soft intercalations[J]. Site Investigation Science and Technology，1996，(5)：3–7.(in Chinese))
[11] 刘沐宇，徐长佑. 硬石膏的流变特性及其长期强度的确定[J]. 中国矿业，2000，(2)：58–60.(LIU Muyu，XU Changyou. Rheological properties of anhydrite and determination of its long-term strength[J]. China Mining Magazine，2000，(2)：58–60.(in Chinese))
[12] SZCZEPANIK Z，MILNE D，KOSTAKIS K，et al. Long term laboratory strength tests in hard rock[C]// Proceedings of the 10th Congress of the International Society for Rock Mechanics. [S.l.]：[s.n.]，2003：1 179–1 184.
[13] 侯宏江，沈明荣. 岩体结构面流变特性及长期强度的试验研究[J]. 岩土工程技术，2003，(6)：324–326.(HOU Hongjiang，SHEN Mingrong. Rheological properties of rock mass discontinuities and trial research of its long-term strength[J]. Geotechnical Engineering Technique，2003，(6)：324–326.(in Chinese))
[14] 崔希海，付志亮. 岩石流变特性及长期强度的试验研究[J]. 岩石力学与工程学报，2006，25(5)：1 021–1 024.(CUI Xihai，FU Zhiliang. Test study on rock rheological properties and its long-term strength[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(5)：1 021–1 024.(in Chinese))
[15] 邬爱清，周火明，胡建敏，等. 高围压岩石三轴流变试验仪研制[J]. 长江科学院院报，2006，23(4)：28–31.(WU Aiqing，ZHOU Huoming，HU Jianmin，et al. Development of a triaxial rheological testing machine with high pressure confinement in rock mechanics[J]. Journal of Yangtze River Scientific Research Institute，2006，23(4)：28–31.(in Chinese)) |
|
|
|
2012, Vol. 31 
