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低温冻结岩体单裂隙冻胀力与数值计算研究

刘泉声, 黄诗冰, 康永水, 潘阳, 崔先泽

刘泉声, 黄诗冰, 康永水, 潘阳, 崔先泽. 低温冻结岩体单裂隙冻胀力与数值计算研究[J]. 岩土工程学报, 2015, 37(9): 1572-1580. DOI: 10.11779/CJGE201509003
引用本文: 刘泉声, 黄诗冰, 康永水, 潘阳, 崔先泽. 低温冻结岩体单裂隙冻胀力与数值计算研究[J]. 岩土工程学报, 2015, 37(9): 1572-1580. DOI: 10.11779/CJGE201509003
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LIU Quan-sheng, HUANG Shi-bing, KANG Yong-shui, PAN Yang, CUI Xian-ze. Numerical and theoretical studies on frost heaving pressure in a single fracture of frozen rock mass under low temperature[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(9): 1572-1580. DOI: 10.11779/CJGE201509003
Citation: LIU Quan-sheng, HUANG Shi-bing, KANG Yong-shui, PAN Yang, CUI Xian-ze. Numerical and theoretical studies on frost heaving pressure in a single fracture of frozen rock mass under low temperature[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(9): 1572-1580. DOI: 10.11779/CJGE201509003
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低温冻结岩体单裂隙冻胀力与数值计算研究  English Version

  • 1. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北 武汉 430071; 2. 武汉大学水工岩石力学教育部重点实验室,湖北 武汉 430072; 3. 济南市人防建筑设计研究院有限责任公司,山东 济南 250014

基金项目: 国家自然科学基金重点项目（41130742）; 国家自然科学基; 金青年基金项目（41302237）
详细信息
    作者简介:

    刘泉声(1962- ),男,博士,1983 年毕业于山东矿业学院矿山建设专业,现任研究员、博士生导师,主要从事岩土工程方面的教学与研究工作。E-mail: liuqs@whrsm.ac.cn。

    通讯作者:

    黄诗冰

Numerical and theoretical studies on frost heaving pressure in a single fracture of frozen rock mass under low temperature

  • 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Ministry of Education, Wuhan University, Wuhan 430072, China; 3. Jinan Air Defence Architectural Design and Research Institute Co., Ltd., Jinan 250014, China

摘要

    摘要
  • 摘要: 寒区岩体工程中含水裂隙随温度降低会发生水冰相变产生冻胀力,内部冻胀力会驱动裂隙发生Ⅰ型扩展,从单裂隙入手,基于弹性力学、渗流力学和相变理论,建立了考虑水分迁移下的冻胀力求解模型,冻胀力不仅随着水分迁移通量的增加而迅速降低,还与岩石基质以及冰体的力学强度参数有关。采用等效热膨胀系数法对低温裂隙中水冰相变下热力耦合应力场进行了模拟分析,并与理论模型计算结果进行对比,结果表明冻胀力解析解与数值解吻合较好;结合断裂力学,利用应力外推法得出了裂隙尖端应力强度因子的数值解,与理论解析解及半解析解也具有较好的一致性,最后通过实例验证了等效热膨胀系数法的可靠性,可为研究低温裂隙岩体冻融损伤与裂隙扩展研究提供参考。
    Abstract: The frost heaving pressure is induced by water-ice phase transition in water-bearing crack for rock mass at low temperature, which may cause modeⅠcrack propagation. Based on the elastic mechanics, seepage mechanics and phase transition theory, an analytical model for frost heaving pressure in a single fracture is established considering moisture migration. This pressure not only reduces rapidly with the increase of moisture migration flux, but also changes with the mechanical parameters of rock and ice. The crack-tip stress fields under coupled thermal-mechanical condition are simulated by the method of equivalent coefficient of thermal expansion considering water-ice phase transition in crack under low temperature. The numerical solutions of frost heaving pressure and crack-tip stresses are compared with the calculated values from theoretical model. The results show that the analytical solutions are in good agreement with the numerical ones. Then the based on with the fracture mechanics, by using the stress extrapolation method, the numerical solutions of stress intensity factor are obtained, which also coincide well with the analytical and semi-analytical ones. Finally, the numerical simulation method of using the equivalent coefficient of thermal expansion is validated by an example. This study can be a reference for further studies on the damage mechanism and frost propagation of fractured rock mass under freeze-thaw.
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  • 收稿日期:  2014-10-28
  • 发布日期:  2015-09-17

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