重载交通下不同基层类型沥青路面结构应力分析

基于我国沥青路面设计理论及标准,参考实际沥青路面结构,选取不同的沥青路面结构与材料参数,如结构层厚度、模量和泊松比等,采用BISAR3.0路面力学计算程序计算分析不同基层类型对沥青混凝土路面结构内部应力状态的影响。结果表明,柔性基层路面与半刚性基层路面的破坏机理存在明显差异,为了实现2种路面的优势互补,应将柔性基层与半刚性基层的结构进行合理的优化组合,以弥补柔性基层和半刚性基层沥青路面的缺陷。

Analysis for Structural Stress of Asphalt Pavement of Different Types of Basecourses under Heavy Load Traffic

Based on design theories and standards for asphalt pavement in China and by reference to actual structures of asphalt pavement,this paper selects different structure and material parameters of asphalt pavement,such as thickness,modulus and Poisson＇s Ratio of structural layers,etc.,calculates and analyzes influences of different basecourse types on internal stress states of asphalt concrete pavement structures by means of BISAR3.0 mechanical calculation program for pavement.The results show that significant differences exist in failure mechanisms of flexible basecourse pavement and semi-rigid basecourse pavement,to realize complementary advantages of two pavements,the structures of flexible basecourse and semi-rigid basecourse should be optimized and combined in a reasonable way to make up defects of flexible basecourse and semi-rigid basecourse pavements.