倒装式沥青路面结构永久变形分析

RESEARCH ON THE PERMANENT DEFORMATION OF INVERTED ASPHALT PAVEMENT STRUCTURE

为分析倒装式沥青路面结构抗车辙性能,文中通过弹性理论分层总和法的沥青路面车辙预估模型与BISAR程序相结合,研究了倒装式沥青路面结构永久变形。结果表明倒装式沥青结构能减小结构内部的竖向压应力,从而有效减少永久变形即车辙的产生;同时研究发现,路面结构4~10cm深度是最易产生车辙的位置,因此在路面结构设计时,应当采用合理材料,提高部位的抗车辙性能,减少路面车辙,具有一定的实用性。

In order to analyze the anti-rutting performance of the inverted asphalt pavement structure,the perma⁃nent deformation of the inverted asphalt pavement structure is studied using a combination of layered summation method and the BISAR program.The results show that the inverted structure decreases the vertical pressure stress and thereby efficiently reduces the formation of permanent deformation.The depth of 4~10cm of the structure is the most common position to produce rutting.Therefore,it is beneficial to use reasonable material to enhance the antirutting performance of the most vulnerable positions.