中文摘要：

考虑低温条件下出现水-冰相变并有潜热产生的特点，将所开发的热-水-应力耦合模型及其二维有限元程序作了改进，使之可用于岩土体冻融问题的分析．并以Neaupane等的岩石室内冻-融试验为对象进行了数值模拟，将计算、试验和Neaupane的计算中所得的岩石试样上特定点的温度-时间曲线、温度-径向应变曲线作了对比，看到三者的接近程度较好，同时考察了本计算所得的一个岩石试样中不同时刻的温度、位移及应力分布，得出了若干结论．

英文摘要：

Considering the phase change and latent heat production under the condition of low temperature,the coupled thermo-hydro-mechanical model and 2D FEM code developed by the author are improved in this study for the purpose that they can be used for analysis of the freezing-thawing problem in soil and rock. To validate this model, numerical simulations on the freezing-thawing experiment by Neaupane et al are carried out here. Comparing the curves of temperature-time and temperature-radial strain at special points of the specimens obtained computationally by the author and experimentally by Neaupane et al,satisfactory agreement is found. At the same time, the distributions of temperature, displacement and stress in the specimen are investigated, with some valuable conclusions obtained.