宿迁地区干线公路沥青路面结构永久变形预估分析

Prediction of Permanent Deformation of Asphalt Pavement in Suqian Area Highway

车辙是高等级沥青路面的主要病害类型,基于蠕变率控制标准车辙预估模型,针对宿迁地区干线公路主要路面结构形式,以及不同类型面层材料进行了设计期内永久变形分析,研究得出了基层、底基层对于路面结构长期永久变形效应的敏感性影响及相应规律,同时,从面层永久变形角度考虑,提出了干线公路重载交通路段路面结构下面层的厚度阀值建议。

Rutting is major disease of arterial highway, in order to estimate the development of rut during the design period, based on the standard rutting prediction model controlled by creep rate, the paper analyzes the permanent deformation of the pavement according to the main pavement structure of trunk highway in Suqian area and the different types of surface materials. The sensitivity and corresponding laws of the base layer and subbase layer on the long-term permanent deformation effect of pavement structure were obtained. Meanwhile, considering the permanent deformation of the surface layer, the paper proposes the thickness threshold recommendation of the under course below the pavement structure of heavy traffic sections.