机场水泥混凝土道面接缝优化技术研究

接缝病害是水泥混凝土道面的主要损坏类型之一。除了飞机轮载作用和自然环境影响之外,接缝槽口的形状和尺寸对病害的形成也有一定的影响。该文基于有限元分析方法,对比研究了6种不同接缝形式下,接缝边缘位置的荷载应力和温度应力,发现接缝倒角技术能够明显改善接缝位置的应力状况。而浦东机场三跑道和虹桥机场二跑道系统的工程实践证明,接缝倒角技术不仅可以降低道面维护费用,而且还能提高道面使用的安全性和可靠性,具有明显的经济效益和社会效益。

Study on Optimized Airport Cement Concrete Pavement Joint Technology

The joint fault is one of main damage types for the cement concrete pavement.Besides the airplane wheel loading action and the natural environmental influence,the type and dimension of joint notch also have some influence on forming of fault.Based on the finite element analysis,and after comparing and studying the loading stress and temperature stress at the joint edge positions of six different joint types,the article finds that the joint chamfer technique can obviously improve the stress status of joint position.The engineering cases of Pudong Airport No.3 Runway and Hongqiao Airport No.2 Runway are proved that the joint chamfer technique can not only decrease the pavement maintenance cost,but also can enhance the pavement using safety and reliability with the obvious economical benefit and social benefit.