Study on Temperature Field and Saturated-unsaturated Seepage Field Coupling for Earth Dam Based on Lu Model
It is of great significance to study the interaction characteristics of temperature field and seepage field for seepage heat monitoring of earth-rock dams.This paper takes the homogeneous earth-rock dam as the research object,and uses the porous medium heat transfer module and the porous medium groundwater seepage module that come with COMSOL Multiphysics software for calculation.The Lu model is introduced into the model to describe the quantitative relationship between thermal conductivity and water content,while considering the flow A two-dimensional saturated-unsaturated seepage heat transfer model in a homogeneous porous medium was established.The results show that the soil saturation has a great influence on the heat transfer of the dam body.In the unsaturated soil,the difference between the maximum and minimum thermal conductivity can reach more than 50％.Compared with the traditional thermal parameter model,the Lu model can better describe the relationship between soil saturation and thermal parameters.The temperature field of the dam body is sensitive to the change of the seepage field,and the leakage of the dam body can be fed back through the temperature field.
Temperature fieldsaturated-unsaturated seepage fieldcouplingLu model
万方数据
维普
