【摘要】 为揭示季节性冻土路基温度场、应力场和夏季降雨与冰晶融化所产生的渗流场,三场耦合引起的冻土路基变形与破坏。根据热流固三场耦合理论,提出了考虑相变的温度场、渗流场和变形场耦合的数学力学模型,体现了冻土路基中固体骨架、水、冰三相介质的水、热、力耦合作用;在数值模拟分析中,将路基仅受温度载荷与温度和车辆荷载共同作用进行了比较,得出冻土路基的变化规律,其研究结果对冻土路基的施工和维护有一定指导意义。更多还原

【Abstract】 The frozen soil subgrade deformation and the destruction rule are revealed which caused by the three-way coupling model,the temperature field of seasonal frozen soil subgrade,the stress field and the summer rain and the ice crystal melting producing seepage. According to the coupling theory of thermo-hydro-mechanical,proposing mathematics mechanical model which coupled by temperature field,deformation field and seepage of taking phase changing into consideration,the model manifests the coupling mechanism of solid skeleton,the ice and the water. In simulation analysis,compared only receiving temperature load with the temperature load and the vehicles load,gets deformation and destruction rule of frozen soil subgrade,and the findings has certain guiding sense to the frozen soil subgrade construction and the maintenance.更多还原