冻结岩体单裂隙应力场分析及热–力耦合模拟

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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.

Key words： rock mechanics fractured rock mass phase transition frost force stress intensity factor

Received: 07 September 2010

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http://www.rockmech.org/EN/Y2011/V30/I2/217

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