热流固耦合作用下冻土路基变形规律研究  

The Deformation Rule of Frozen Soil Subgrade Caused by Thermo-hydro-mechanical Coupling Model

作　　者：李凯[1] 孙可明[1] 吴迪[1] 

机构地区：[1]辽宁工程技术大学,阜新123000

出　　处：《科学技术与工程》2009年第24期7399-7402,共4页Science Technology and Engineering

基　　金：辽宁省百千万人才工程资助项目(08317)资助

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。The frozen soil subgrade deformation and the destruction rule are revealed which caused by the threeway 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 changing taking phase 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.

关 键 词：冻土路基 耦合模型 有限单元法 

分 类 号：TU416.68[建筑科学—岩土工程]