花岗岩低温强度参数与冰胀力的关系研究

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摘要岩石低温强度参数与冰胀力存在一定的关系，基于冰的热力学特性，建立冰胀力与变低温的数学关系。考虑地下LNG储库近区围岩长期处于0 ℃～－50 ℃的环境中，利用干燥低温与饱和冻结花岗岩的三轴压缩试验结果，探讨干燥与饱和花岗岩变低温在不同围压水平下的剪切强度指标变化规律；针对Mohr-Coulomb强度准则和广义Mises屈服条件(包括Drucker-Prager强度条件)，建立变低温冻结状态下岩石强度参数与温度和冰胀力的关系。研究表明，岩石孔隙冰胀力与随温度变化的冰的力学参数和体胀系数有关，且随温度降低逐渐减小；低温冻结状态下花岗岩内摩擦角和黏聚力与温度和冰胀力有关，冻结饱和状态下的内摩擦角和黏聚力总是大于干燥低温状态。试验结果及强度条件可用于地下LNG储库围岩的长期稳定性研究与评价。

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	李云鹏1
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	王芝银1
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关键词 ：岩石力学, 地下LNG储库, 强度参数, 冰胀力, 低温, 花岗岩

Abstract：The strength parameters of rock under low temperature have a certain relationship with the ice expansion force. Based on thermodynamic properties of ice，the mathematical relationship between varying low temperature and ice expansion force is created. Considering that the surrounding rocks near the underground liquefied natural gas(LNG) storage caverns lie in 0 ℃–－50 ℃ environment for a long time，the compressive strength laws of dry and saturated granite at varying low temperature are studied under different confining pressures by using the triaxial compression test results of dry and saturated frozen granite samples. According to Mohr-Coulomb criterion and generalized Mises conditions(including Drucker-Prager criterion)，the relations among the rock strength parameters，temperature and ice expansion force are established under varying low temperature conditions. The results show that：The ice expansion force of rock pore has a relationship with the mechanical parameters and the volume expansion coefficient of ice changing with low temperature；and the ice expansion force gradually decreases with reducing temperature. The internal friction angle and cohesion of frozen granite are relative to varying low temperature and ice expansion force；and their values in frozen state are always greater than those in dry conditions at the same temperature. The results and the strength conditions can be used for researching and evaluating the long-term stability of surrounding rocks of underground LNG storage caverns.

Key words： rock mechanics underground liquefied natural gas(LNG) storage strength parameters ice expansion force low temperature granite

引用本文:

李云鹏1，2，王芝银1，2. 花岗岩低温强度参数与冰胀力的关系研究[J]. 岩石力学与工程学报, 2010, 29(S2): 4113-4118.
LI Yunpeng1，2，WANG Zhiyin1，2. STUDY OF RELATIONSHIP BETWEEN STRENGTH PARAMETERS AND ICE EXPANSION FORCE OF GRANITE UNDER LOW TEMPERATURE. , 2010, 29(S2): 4113-4118.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2010/V29/IS2/4113

[1] YAMABE T，NEAUPANE K M. Determination of some thermo- mechanical properties of Sirahama sandstone under subzero temperature condition[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(7)：1 029–1 034.

[2] PARK C，SYNN J H，SHIN H S，et al. An experimental study on the thermal characteristics OF rock at low temperature[C]// Proceedings of International symposium on Rock Mechanics SINOROCK¢2004. [S. l.]：Elsevier，2004：367–368.

[3] KENJI A，KEISUKE H，TAKEHISA Y. Storage of refrigerated liquefied gases in rock caverns：characteristics of rock under very low temperatures[J]. Tunnelling and Underground Space Technology，1990，5(4)：319–325.

[4] 杨更社，张长庆. 冻融循环条件下岩石损伤扩展研究初探[J]. 西安矿业学院学报，1999，19(2)：97–100.(YANG Gengshe，ZHANG Changqing. Initial discussion on the damage propagation of rock under the frost and thaw condition[J]. Journal of Xi¢an Mining Institute，1999，19(2)：97–100.(in Chinese))

[5] 张淑娟，赖远明，苏新民，等. 风火山隧道冻融循环条件下岩石损伤扩展室内模拟研究[J]. 岩石力学与工程学报，2004，23(24)：4 105–4 111.(ZHANG Shujuan，LAI Yuanming，SU Xinmin，et al. A laboratory study on the damage propagation of rocks under freeze-thaw cycle condition[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(24)：4 105–4 111.(in Chinese))

[6] 徐光苗，刘泉声，彭万巍，等. 低温作用下岩石基本力学性质试验研究[J]. 岩石力学与工程学报，2006，25(12)：2 502–2 508.(XU Guangmiao，LIU Quansheng，PENG Wanwei，et al. Experimental study on basic mechanical behaviors of rocks under low temperatures[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(12)：2 502–2 508.(in Chinese)).

[7] 徐光苗，刘泉声. 岩石冻融破坏机理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))

[8] 刘成禹，何满潮，王树仁，等. 花岗岩低温冻融损伤特性的实验研究[J]. 湖南科技大学学报(自然科学版)，2005，20(1)：37–40. (LIU Chengyu，HE Manchao，WANG Shuren，et al. Experimental investigation freeze-thawing damage characteristics of granite at low temperature[J]. Journal of Hunan University of Science and Technology (Natural Science Edition)，2005，20(1)：37–40.(in Chinese))

[9] 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)).

[10] 唐明明，王芝银，孙毅力，等. 低温条件下花岗岩力学特性试验研究[J]. 岩石力学与工程学报，2010，29(4)：787–794.(TANG Mingming，WANG Zhiyin，SUN Yili，et al. Experimental study of mechanical properties of granite under low temperatures[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(4)：787–794.

[11] 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 the China Railway Society，1999，21(6)：70–74.(in Chinese)).

[12] 王洪刚. 热弹性力学概论[M]：北京：清华大学出版社，1989. (WANG Honggang. Thermoelasticity introduction[M]. Beijing：Tsinghua University Press，1989.(in Chinese))

[13] 宋涛. 静冰荷载对水工建筑物的影响研究[硕士学位论文][D]. 天津：天津大学，2007.(SONG Tao. Effects of static ice loads on hydraulic structure[M. S. Thesis][D]. Tianjin：Tianjin University，2007.(in Chinese))

[14] ISRM. Suggested methods for determining the strength of rock materials in triaxial compression[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1983，20(6)：283–290.

[15] 郑颖人，沈珠江，龚晓南. 岩土塑性力学原理[M]. 北京：中国建筑工业出版社，2002：60–61.(ZHENG Yingren，SHEN Zhujiang，GONG Xiaonan. Principles of geotechnical plastic mechanics[M]. Beijing：China Architecture and Building Press，2002：60–61.(in Chinese))