【作者】 朱洪洲； 唐伯明； 何兆益；

【Author】 ZHU Hongzhou,TANG Boming,HE Zhaoyi (Chongqing Jiaotong University,Chongqing 400074,China)

【机构】 重庆交通大学；

【摘要】 柔性基层沥青路面在我国具有良好的推广应用前景,然而其结构设计尚有欠缺。本文综合分析了国内外柔性基层沥青路面典型结构,采用正交分析方法,分析了沥青稳定基层厚度、级配碎石基层厚度及土基模量等关键结构参数对路表回弹弯沉、沥青层层底拉应力两个柔性基层沥青路面性能指标的影响。研究表明:土基模量对于路表回弹弯沉的影响最为显著;增加沥青层厚度可以减小沥青层底拉应力,延长沥青路面疲劳寿命,然而当沥青层厚度超过25cm以后,继续增加其厚度对于延长沥青路面疲劳寿命作用不大。更多还原

【Abstract】 Flexible base asphalt pavements being used increasingly in high grade roads in China.However,systemic design method for flexible base asphalt pavements was also absented.Through analyzing the key factors in the structure design of flexible pavement,the depth of asphalt treated base and unbound graded aggregate base,the module of subgrade should be considered chiefly.The influence on pavement performance of these factors was researched using the orthogonal method.The results show that:the module of subgrade has important influence on pavement surface deflection; the bottom layer tensile stress reduced with the increase of depth of asphalt treated base,while the depth of asphalt treated base has little effect on tensile stress when the total depth of asphalt layer exceeding 25 cm.更多还原