裂隙岩体水–冰相变及低温温度场–渗流场–应力场耦合研究

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Abstract The problem of freezing-thawing damage of rock mass involves thermo-hydro-mechanical(THM) coupling at low temperature. Based on the phase transition theory and the energy conservation principle，the expression of frozen ratio is derived. Using the dual-porosity medium theory，the governing equations of THM coupling of freezing rock are obtained according to the law of mass conservation，the law of energy conservation and the principle of static equilibrium. Finally，considering the influence of freezing process on permeability，an example of fractured tunnel is given to reveal the distribution of temperature field，stress field and pore pressure under THM coupling condition by using the method of equivalent thermal expansion coefficient.

Key words： rock mechanics freezing rock thermo-hydro-mechanical(THM) coupling phase transition dual-porosity medium

Received: 24 March 2011

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http://www.rockmech.org/EN/Y2011/V30/I11/2181

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