摘要
在饱和冻土多孔多相介质理论构架的基础上,通过引入Clapeyron方程描述温度梯度对冻结区水分迁移影响,并结合寒区工程的实际特点,对数学耦合模型中的应力平衡方程、连续性方程、能量方程进行了适当的简化,从而建立了实用化的饱和冻土温度场、水分场、变形场耦合分析的数值模型。据此开发了能够反应各种外因(外载、温度)作用下土体多场耦合机制的有限元分析程序,利用研发的程序对经典试验进行了分析,初步验证了模型及分析程序的可行性与合理性,为模型的工程应用奠定了基础。
Based on the theoretical frame of multi-phase porous medium for saturated frozen soils, the momentum equilibrium equation, the continuity equation, and the energy equation of the coupled model for frozen soils are simplified through the introduction of Clapeyron equation to describe the temperature gradient on the moisture migration in freezing zone and considering the actual engineering characteristics in cold regions. The program of the FEM resolution for the coupled heat-moisture-deformation model for civil engineering in cold zone is established under the plane strain. The simulated results for analyzing Penner＇s lab heaving tests are introduced to check and validate the rationality and reliability of the proposed model.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2012年第10期1858-1865,共8页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金创新群体项目(40821001)
中科院寒区旱区研究所重点实验室项目(SKLFSE-ZY-03)
关键词
冻土
水热力耦合模型
水分迁移
相变
frozen soil
coupled heat-moisture-deformation model
moisture migration
phase change
