|
|
|
| ANALYSIS OF STRESS FIELD AND COUPLED THERMO-MECHANICAL SIMULATION OF SINGLE-FRACTURE FREEZED ROCK MASSES |
| (1. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Ministry of Education，School of Civil Engineering and Architecture，Wuhan University，Wuhan，Hubei 430072，China；2. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China) |
|
|
|
|
Abstract There is a vast area of cold regions distributed in China. The problems that freezing-thawing damage will seriously threaten the stability of rock engineering need to be solved，which involve the thermo-hydro- mechanical(THM) coupling problem at a low temperature. Considering the migration of water and phase transition，the distributions of stress field and stress intensity factor near the fracture are analyzed by using the theories of fracture mechanics and elastoplastic mechanics. Considering the effect of temperature on freezing ratio，the frost load is simulated by method of equivalent coefficient of thermal expansion. Finally，the model for freezing fracture is established with FISH program to simulate the stress field near the fracture；and comparisons between numerical and analytical results are made.
|
|
Received: 07 September 2010
|
|
|
|
| [1] 罗彦斌. 寒区隧道冻害等急划分及防治技术研究[博士学位论文][D]. 北京：北京交通大学，2010.(LUO Yanbin. Study on frost damage grades and its prevention and control technologies in cold region tunnel[Ph. D. Thesis][D]. Beijing：Beijing Jiaotong University，2010.(in Chinese))
[2] 中华人民共和国行业标准编写组. TB1003–2005铁路隧道设计规范[S]. 北京：中国铁道出版社，2005.(The Professional Standards Compilation Group of People¢s Republic of China. TB1003–2005 Code for design of railway tunnel[S]. Beijing：China Railway Publishing House，2005.(in Chinese))
[3] 赖远明，张明义，李双洋. 寒区工程理论与应用[M]. 北京：科学出版社，2009.(LAI Yuanming，ZHANG Mingyi，LI Shuangyang. Engineering theory and application in cold region[M]. Beijing：Science Press，2009.(in Chinese))
[4] DAVIDSON G P，NYE J F. Photoelasticity study of ice pressure in rock cracks[J]. Cold Regions Science and Technology，1985，11(2)：141–153.
[5] WINKLER E M. Frost damage to stone and concrete：geological considerations[J]. Engineering Geology，1968，2(5)：315–323.
[6] 赖远明，吴紫汪，朱元林，等. 寒区隧道冻胀力的黏弹性解析解[J]. 铁道学报，1999，21(6)：70–74.(LAI Yuanming，WU Ziwang，ZHU Yuanlin，et al. Analytical viscoelastic solution for frost force of cold regional tunnels[J]. Journal of China Railway Society，1999，21(6)：70–74.(in Chinese))
[7] 杨更社，奚家米，李慧军，等. 三向受力条件下冻结岩石力学特性试验研究[J]. 岩石力学与工程学报，2010，29(3)：459–464.(YANG Gengshe，XI Jiami，LI Huijun，et al. Experimental study of rock mechanical properties under triaxial compressive and frozen conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(3)：459–464.(in Chinese))
[8] 仇文革，孙 兵. 寒区破碎岩体隧道冻胀力室内对比试验研究[J]. 冰川冻土，2010，32(3)：557–561.(QIU Wenge，SUN Bing. Model test study of frost heaving pressures in tunnels excavated in fractured rock mass in cold regions[J]. Journal of Glaciology and Geocryology，2010，32(3)：557–561.(in Chinese))
[9] O?NEIL K，MILLER R D. Exploration of a rigid ice model of frost heave[J]. Water Resources Research，1985，21(3)：281–296.
[10] PIPER D，HOLDEN J T，JONES R H. A mathematical model of frost heave in granular materials[C]// Proceedings of the 5th International Conference on Permafrost. Norway：Tapir Publication，1988：370–376.
[11] 张继周，缪林昌，杨振峰. 冻融条件下岩石损伤劣化机制和力学特性研究[J]. 岩石力学与工程学报，2008，27(8)：1 688–1 694. (ZHANG Jizhou，MIAO Linchang，YANG Zhenfeng. Research on rock degradation and deterioration mechanisms and mechanical characteristics under cyclic freezing-thawing[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(8)：1 688–1 694.(in Chinese))
[12] 谭贤君，陈卫忠，贾善坡，等. 含相变低温岩体水热耦合模型研究[J]. 岩石力学与工程学报，2008，27(7)：1 455–1 461.(TAN Xianjun，CHEN Weizhong，JIA Shanpo，et al. A coupled hydro-thermal model for low temperature rock including phase change[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(7)：1 455–1 461.(in Chinese))
[13] 徐光苗，刘泉声. 岩石冻融破坏机制分析及冻融力学试验研究[J]. 岩石力学与工程学报，2005，24(17)：3 076–3 082.(XU Guangmiao，LIU Quansheng. Analysis of mechanism of rock failure due to freeze-thaw cycling and mechanical testing study on frozen-thawed rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 076–3 082.(in Chinese))
[14] THARP T M. Conditions for crack propagation by frost wedging[J]. Geological Society of America Bulletin，1987，99(1)：94–102.
[15] GLAMHEDEN R. Thermo-mechanical behaviour of refrigerated caverns in hard rock[Ph. D. Thesis][D]. Gothenburg：Chalmers University of Technology，2001.
[16] 尹双增. 断裂、损伤理论及应用[M]. 北京：清华大学出版社，1992.(YIN Shuangzeng. Fracture and damage theories and their application[M]. Beijing：Tsinghua University Press，1992.(in Chinese))
[17] CHEN W F，SALEEB A F. Elasticity and plasticity[M]. Beijing：China Architecture and Building Press，2005.
[18] 张敦福，李术才，牛海燕，等. 偶应力对裂纹扩展的影响及其尺度效应[J]. 岩石力学与工程学报，2009，28(12)：2 453–2 458. (ZHANG Dunfu，LI Shucai，NIU Haiyan，et al. Influence of couple stress on crack growth and its scale effect[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(12)：2 453–2 458.(in Chinese))
[19] 张玉军. 模拟冻–融过程中热–水–应力耦合模型及数值分析[J]. 固体力学学报，2009，30(4)：409–415.(ZHANG Yujun. Coupled thermo-hydro-mechanical model and numerical analysis for simulation of freezing-thawing process[J]. Chinese Journal of Solid Mechanics，2009，30(4)：409–415.(in Chinese)) |
|
|
|
2011, Vol. 30 
