【摘要】 随着交通荷载的轴重、速度及激励频次大幅度增加,路基结构产生的动荷载效应剧增。为探索重载交通荷载对路基的影响,通过现场测试,得到了重载车辆荷载下路基结构动态应力分布范围及分布规律,并建立了路基结构动应力变化公式,把重载交通荷载作用下的路基结构划分为动荷载敏感区和动荷载影响区。研究结论可为提出动力性能相适应的路基结构设计、评估新方法与新技术提供参考。更多还原

【Abstract】 With the increase of axle load, speed and excitation frequency of moving wheel load of automobile and train, the dynamic load effect of subgrade structure increases sharply. In order to explore the influence of heavy traffic load on subgrade, the distribution range and attenuation law of dynamic stress of subgrade under heavy vehicle load were obtained through field test, and the formula of dynamic stress attenuation of subgrade under heavy traffic load was established. The subgrade under heavy traffic load was divided into dynamic load sensitive area and dynamic load influence area. The research conclusion provides a reference for the new method and new technology of roadbed structure design evaluation adapted to dynamic performance.更多还原