大型飞机荷载作用下站坪结构对地基土附加应力的影响分析

基于轴对称荷载层状弹性理论，可得垂直均布荷载作用下分层地基土的解析解；利用BISAR3软件进行计算，分析了在大型飞机多轮荷载作用下，刚性及柔性道面各结构层刚度及厚度变化时，对地基土附加应力的影响。分析结果表明:刚性道面相对于柔性道面，土基内应力扩散较大，土基顶部附加应力相对小了46 %左右；无论对于刚性道面或柔性道面，各结构层厚度变化的影响均要大于刚度变化的影响。此分析方法，可为机场站坪沉降及道面设计提供参考。

Analysis on Influence of Apron Structure on Additional Stress in Foundation Soil under Action of Large Aircraft Loads

Based on muhilayer elastic theory for axisymmetric load, the analytical solution of layered foundation soil under the action of uniformly distributed vertical load may be obtained. With BISAR3 software, where the stiffness and thickness of each structural layer of rigid and flexible pavement change under the action of multi-wheel load of large aircraft, the influence on additional stress in the foundation soil was studied. The result shows that the rigid pavement, against flexible pavement, has large stress dispersion in soil foundation and reduces the additional stress on the top of the foundation by about 46% ; regardless of these two kinds of pavement, the effect of change in each structural layer＇s thickness is larger than that in the stiffness. This analysis method may be referred to in apron settlement and pavement design.