超薄沥青路面早期损害裂缝和车辙的特点分析

摘要

The ultra-thin asphalt pavement ow ns distinctive early stage disease such as early significant cracks and rutting since it has a thin surface layer compared to traditional pavement structure .The re-search establishes models to simulate National Highway 1 in Congo (Brazzaville) by MEPDG soft-ware .Considering load level and pavement material properties ,the research analyzes the reason of early disease in ultra-thin asphalt pavement .By adjusting the key factors of modulus and thickness of each layer ,the simulation arrives at the 95% reliability requirements of pavement structural strength such as top-down cracks and down-top cracks and rutting .The research also proves the performance of various pavement structure to resist high traffic growth rate ,and draw s conclusions about reasona-ble indicator trends of ultra-thin asphalt pavement .%根据非洲刚果（布）国家一号公路实地实验数据，采用M EPDG软件进行建模，在实际荷载水平及路面材料性质下，分析超薄沥青路面早期病害的原因，变化各层材料弹性模量和厚度，对车辙深度和疲劳裂缝等指标对结构强度和早期损害的影响，取95％保证率下符合可靠性要求的结果。进一步分析路面结构对高交通增长率的抵抗能力强弱，提出针对降低超薄沥青路面早期损害的措施。