机场道面板底部应力模型研究
Research on Stress Model at the Bottom of Airport Pavement Slab

本研究针对机场高填方地基在安装水泥混凝土道面板后，由于地基沉降不均引发板底应力的变化的问题，采用有限单元法，借助有限元软件建立了机场高填方地基上水泥混凝土道面板的二维有限元模型，深入研究了这种应力变化的规律。通过理论分析和有限元仿真相结合的方法，构建了不同填方高度30 m~90 m的高填方模型，提取道面板底部路径发现，填方高度90 m条件下，在道面板最右侧处的最大压应力为0.06 MPa，填方高度30 m下，最小压应力为0.02 MPa。这项研究对于理解机场道面板在高填方地基下的受力特性具有重要意义，为提高机场道面使用寿命和安全性提供了关键信息。
In this study, aiming at the problem that the uneven settlement of the foundation causes the change of the stress at the bottom of the plate after the cement concrete pavement is installed on the high fill foundation of the airport, the finite element method is used to establish the two-dimensional fi-nite element model of the cement concrete pavement on the high fill foundation of the airport with the help of the finite element software, and the law of this stress change is studied in depth. Through the combination of theoretical analysis and finite element simulation, a high fill model with different fill heights of 30 m~90 m was constructed. The bottom path of the pavement slab was extracted. It was found that under the condition of the fill height of 90 m, the maximum compres-sive stress at the rightmost side of the pavement slab was 0.06 MPa. Under the fill height of 30 m, the minimum compressive stress was 0.02 MPa. This study is of great significance for understand-ing the mechanical characteristics of airport pavement under high fill foundation, and provides key information for improving the service life and safety of airport pavement.