基于AASHTO 2002的我国沥青路面设计参数修正

Revision of Design Parameters of Asphalt Pavement of China Based on AASHTO 2002

研究了不同季节对交通轴载换算、土基回弹模量的影响以及材料动态参数对路面结构设计的影响,并通过对轴载换算的季节修正,用等效土基回弹模量代替最不利季节土基回弹模量以及用材料动态模量代替静态模量,进行了路面结构设计以及综合结构设计。结果表明,不同季节对交通轴载换算、土基回弹模量存在较大影响,材料动态参数与静态参数差异较大。综合考虑轴载换算的季节修正、土基的等效回弹模量、材料的动态参数,既能满足结构性能要求,又能满足经济性要求。

The effect of different seasons on traffic axle load conversion and soil base＇s resilient modulus and the effect of material＇s dynamic parameters on pavement structure design are studied. The season-correcting for axle load conversion is conducted, the equivalent soil base＇s resilient modulus is used instead of soil base＇s resilient modulus of the most unfavorable season, the material＇s dynamic modulus is used instead of static modulus, and the pavement structure design and the integrated structure design are performed. The result shows that the effect of different seasons on traffic axle load conversion and soil base＇s resilient modulus is great, and there are a lot of differences between material＇s dynamic parameters and static parameters. A comprehensive consideration of season-correcting coefficient, equivalent soil base＇s resilient modulus and material＇s dynamic modulus not only can meet the performance requirements, but also can meet the demand of economy.