飞机移动荷载作用下跑道地基响应范围变化规律

Influence scope of airport runway ground under aircraft moving loads

针对目前机场场道工程设计中未考虑飞机移动荷载特性、道面结构及地基土特性与土基影响深度之间关系的状况,基于国际平整度指数IRI的飞机移动荷载计算理论和层状弹性体系理论,构建了考虑道面结构—土基—飞机移动荷载的动力分析模型。系统分析了不同道面结构和不同机型在土基顶面产生的最大附加动应力分布规律,获得了飞机移动过程中最大附加动应力横向影响范围及随深度的变化规律。研究结果为机场场道工程设计及优化提供了理论依据和参考。

The relationship among aircraft moving loads,pavement structures,characteristics of foundation soils and influence depths of soil foundations is accounted in the design of airport runways.Based on the international smoothness index and the theory of layered elastic system,a dynamic analysis model considering the moving loads of pavement structures,soil foundations and aircrafts is established.The distribution laws of the maximum additional dynamic stress on the top surface of soil foundations caused by different pavement structures and different aircraft types are systematically analyzed.The lateral influence range of the maximum additional dynamic stress and its variation with depth in the process of aircraft movement are obtained.The research results can provide theoretical basis and reference for the design and optimization of airport runways.