基于侧向位移法的沥青层流动性车辙分析

Flow Rutting Analysis in Asphalt Layers Based on Lateral Displacement Method

摘要:

为分析高速公路严重车辙路段流动性车辙形成的原因，建立了沥青路面3维有限元模型，提出以沥青层的侧向(横向)位移发展趋势分析法代替传统的竖向位移分析方法.分析结果表明，基于沥青层横向位移发展趋势的车辙变形评价方法能够简单清楚地解释沥青路面流动性车辙形成的方式和原因，指出当沥青上中面层结构组合不协调时，沥青上面层极易出现侧向流动失稳变形.

关键词:沥青路面; 流动性车辙; 侧向位移法; 沥青层结构组合

Abstract:

A threedimensional FEM model was developed to study the cause of flow rutting with the rutting analysis method based on lateral displacement instead of the traditional method based on vertical displacement. The study results show that the rut evaluation method by lateral displacement tendency of asphalt layers can simply and clearly explain the form and cause of flow rutting of asphalt pavement. The surface layer tends to appear plastic flow rutting when the structural module composition for surface and middle layers is not coordinated.

Key words:asphalt pavement; flow rutting; lateral displacement method; structural combination of asphalt layers