新型路基结构复合装置增强高原冻土路基热稳定性能研究

Research on Improving Thermal Stability of Plateau Permafrost Subgrade Using Novel Subgrade Structure Composite Device

通过对高原冻土层遮阳装置进行改进,分析了遮阳装置的传热热力学理论,为改进其传热通路提供了理论依据,并提出一种新型路基结构复合装置提升高原冻土路基热稳定性。使用三维制图软件对改进前后冻土层路基结构进行建模,之后使用ANSYS仿真软件对改进前后的结构进行热学仿真分析,对比分析改进前后的仿真结果可以发现,新型遮阳装置由于采用了空心砖阻热结构,降低了自身热导率,使得路基冻土层温度相较于之前的遮阳装置温度下降了3.248℃,对改善路基热稳定性起到了很好的作用,为高原冻土层路基热稳定性能的提升提供了新的思路。

Improving the sunshade device for the plateau permafrost, the thermodynamic theory of heat transfer of the sunshade device was analyzed, in order to provide theoretical evidence for improving the heat transfer pathway. A novel subgrade structural composite device was developed to enhance the thermal stability of the plateau permafrost subgrade. The 3 D mapping software was used to establish the permafrost subgrade structure model before and after the improvement, and then the thermal simulation analysis of the structure before and after the improvement was carried out by the ANSYS simulation software. By comparing the simulation results, it can be seen that, the novel sunshade device adopted the hollow brick heat resistance structure, which causes the reduction of its own thermal conductivity, so the temperature of the permafrost subgrade decreased by 3.248 ℃ compared with using previous sunshade device. It provides a new concept for improving the thermal stability of the plateau permafrost subgrade and has great effects.