城区道路交通荷载等级双维度划分标准的研究

Research on Two Dimension Grading Standards about Traffic Load of Urban Road

通过国内多座城市交通轴载调查,分析了当前城区道路交通量与轴载关系、道路交通量变化趋势以及道路被交叉口分隔后的各段交通量差异。提出表征城区道路荷载特性参数Z,并以其为指标进行道路荷载等级分级划分,提出比例谱划分法与简易划分法。适应城市交通荷载变化特点,将荷载等级分级与交通等级分级共同构成双维度耐久性沥青路面结构设计的依据,以荷载等级分级进行路面结构组合设计,以交通等级分级进行路面结构厚度设计,可为城区沥青路面设计借鉴。

This research made several investigations about traffic load and analyzed the relationship between axle load and urban road traffic,the variation tendency of urban road traffic and the difference of traffic volume between road sections separated by crossings.And it put forward a parameter Z to characterize the road traffic load,and took it as the road load classification index.Also,this paper put forward axle load spectrum and simple division method.Due to the characteristics of urban road traffic changing,load level classification was used for pavement structure combination design and traffic level classification for thickness design.The two dimension durability pavement design method composed of load and traffic level classification can be referred by urban asphalt pavement design.