考虑季节变化的沥青路面设计方法

Design methods of asphalt pavement by considering seasonal variation

路基及沥青路面材料强度是随季节变化的,相同荷载作用下的路面结构中实际应力、应变及疲劳破坏程度不同季节是不同的.在轴载换算时需要进行季节修正.通过分析路面设计基础参数的变化,指出了现行沥青路面设计规范的不足,在理论分析的基础上,借鉴国外的设计方法,对现行规范的修改提出了建议,给出了考虑季节变化的沥青路面设计方法.

Since temperature and moisture conditions vary with seasons, strength of subgrade and pavement materials vary with the seasons too. Furthermore, when the load is the same, the actual stress and strain in the structure of pavement and the degree of fatigue failure also vary with the seasons. As the fatigue failure of asphalt pavement caused by axle load changes with the seasons, the effect of season should be considered when axle load transformation computation is made. The author analyzes the variation of fundamental design parameters, points out the shortage of specification for design of highway asphalt pavement, and proposes a calibrating design method by considering the variation of season and using the abroad design method as references.