结构层厚度对半刚性基层沥青路面车辙的影响分析  

Impact of Structure Layer Thickness on Rut of Semi Rigid Base Asphalt Pavement

作　　者：肖桂元[1] 栾利强[1] 

机构地区：[1]桂林理工大学广西岩土力学重点实验室,桂林市541004

出　　处：《公路》2016年第11期47-52,共6页Highway

基　　金：国家自然科学基金资助项目;项目编号51108110;51369010;41262011;广西科学技术开发项目;桂科攻1598009-7;桂科转1355011-1;广西自然科学基金创新团队项目;项目编号2012GXNSFGA060001

摘　　要：路面结构本身对车辙的产生和变化存在较大影响。文中为了研究路面结构对车辙的影响,进行了3种沥青混合料的flow number试验,对试验数据进行回归,得到了时间硬化模型参数。对国内常见的半刚性基层沥青路面建立车辙有限元模型,并分析路面结构层厚度对车辙的影响。结果表明:车辙随中面层和下面层厚度的增长而递减,随基层厚度的增长而递增;随下面层厚度的增长而递减的趋势逐渐变慢,当下面层厚度较薄时车辙随其厚度增长而快速减小,当下面层厚度达到20cm时车辙减小的速度明显下降,车辙量趋于稳定。这些结论可为进一步的路面车辙控制研究提供参考。The pavement structure can affect the rutting, in order to study the influence of pavement structure to the rutting, flow number tests are conducted on three asphalt mixtures, and through the regression of experimental data, time hardening model parameters are obtained. Finite element model of rutting to common semi-rigid asphalt pavement in China is established, and the impact of pavement layer thickness on the rutting is analyzed. The results indicate that： the rutting decreases with the thickness growth of middle surface layer and undersurface layer, increases with the thickness growth of base layer, the trend that rutting decrease with the thickness of undersurface layer becomes slow, when the bottom layer is thinner, the rutting decreases rapidly with its growth, and when the bottom layer thickness reaches up to 20cm, the rutting decreases slow significantly, the rutting tends to be stable. The results can provide us some reference for future pavements sturdy on rutting controlling.

关 键 词：沥青混凝土路面 有限元分析 车辙 结构层厚度 

分 类 号：U416.217[交通运输工程—道路与铁道工程]