飞机荷载作用下机场跑道地基土附加应力分析

基于轴对称荷载作用下层状弹性理论得到了垂直圆形均布荷载作用下分层地基的解析解，并编写了相应的计算程序，分析了道面刚度对地基附加应力的影响以及单轮及多轮荷载作用下地基土附加应力分布。结果表明：道面结构层刚度对浅层地基附加应力大小影响较大，随深度增大其影响逐渐减小；多轮荷载作用下地基土附加应力会发生叠加，飞机荷载的横向影响范围约为中线两侧15m。此分析方法可为跑道的沉降及基础设计提供参考。

Analysis of Additional Stress in the Subsoil of the Airport Runway Resulted from Loads of Aircraft

Based on the axisymmetric load layer of elastic system theory, the solution to calculation of stresses caused by vertical circular uniformly distributed load is given, and calculation program is written to analyze the influence of the stiffness of the pavement and single-wheel load and multiple-wheel load to the distribution of additional stress in subsoil. The results show that the additional stress decreases with the increase of depth and radial; the distribution of additional stress is also influenced by the stiffness of the pavement,additional stress of the subsoil increases with the increase of stiffness of the pavement,and the influence is just obvious to the shallow subsoil. Stresses of subsoil are added under multiple-wheel load,and the influenced range is the axis 15 m on both sides. The method can provide references for settlement calculation and foundation design of runway.