典型路面结构抗车辙性能及其影响因素研究

Research on Anti-Rutting Performance of Typical Pavement Structure and Its Influencing Factors

为了研究典型路面结构的抗车辙性能及其影响因素,基于黏弹性本构理论及ABAQUS软件,建立了路面结构车辙变形分析的力学模型,对比分析了五种典型路面结构的抗车辙性能,研究了温度及材料模量对路面结构抗车辙性能的影响。研究表明,常规的半刚性基层路面结构的抗车辙性能优于全厚式沥青路面结构。随着温度的升高,路面结构的抗车辙变形能力降低,当温度超过50℃时,抗车辙能力下降得更为显著。适当的提高中面层材料模量可以提升路面的抗车辙性能,过大的材料模量对进一步提高路面结构的抗车辙能力有限。

In order to study the anti-rutting performance of typical pavement structures and the influencing factors, a mechanical model for rutting deformation analysis of pavement structures was estab-lished based on viscoelastic constitutive theory and ABAQUS software. The anti-rutting properties of five typical pavement structures were compared and analyzed, and the effects of temperature and material modulus on the anti-rutting properties of pavement structures were studied. The re-search shows that the anti-rutting performance of the conventional semi-rigid base pavement structure is better than that of the full-thickness asphalt pavement structure. With the increase in temperature, the anti-rutting deformation ability of the pavement structure decreases, and when the temperature exceeds 50˚C, the anti-rutting ability decreases more significantly. Appropriately increasing the material modulus of the middle surface layer can improve the rutting resistance of the pavement. Excessive material modulus is limited to further improve the rutting resistance of the pavement structure.