论文部分内容阅读
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 framework of porous media with saturated soils, Clapeyron equation is introduced to describe the influence of temperature gradient on the moisture migration in the frozen zone. Combined with the actual characteristics of cold engineering, the stress balance equation, continuity equation , The energy equation is simplified appropriately, and a numerical model of practical coupled analysis of temperature field, moisture field and deformation field in saturated frozen soil is established. Based on this, the finite element analysis program which can reflect the coupling mechanism of soil multi-field under various external factors (external load and temperature) is developed. The classical experiment is analyzed by using the developed program, and the feasibility of the model and the analysis program are preliminarily verified And rationality, laid the foundation for engineering application of the model.