城市道路沥青路面车辙的调查与演化规律研究

车辙是沥青路面结构破坏的主要形式之一。通过杭州市城区主干道车辙现场调查与数值模拟，对车辙发生部位、深度分布和次生病害以及演化规律进行了研究。调查分析表明:城市道路车辙频发于交叉口和公交站点，车辙周围常伴有推移和拥包等次生病害，车辙深度越大发生频次所占百分比越小。模拟结果表明，轮迹带车辙（推移）主要源于中面层的竖向/水平累积变形，面层加筋有利于消减车辙（尤其是推移）病害，当外荷载小于临界值时，车辙（推移）通常呈现为压密稳定的演化趋势。

Survey of Rutting on Asphalt Pavement of Urban Roads and Its Evolution

Rutting is one of the main distresses in the asphalt pavement. Some rutting characteristics, such as rutting occurring location, distribution of rutting depth, secondary distresses and evolution law, are investigated through the in-situ survey and numerical simulation of the rutting in Hangzhou’s main urban roads. The investigation findings show that the occurrence frequency of rutting is highest at the road intersection and bus station, the secondary distresses such as shoving and lumping usually exist around the rutting, and the deeper the rutting, the lesser occurrence frequency, the rutting is deeper. The simulation results indicate that the significant contribution to the rutting or wheel mark(shift) is the vertical or horizontal cumulative deformation of intermediate layer of asphalt course, the rutting or wheel mark(shift) can be effectively restrained through the reinforced pavement in the asphalt course, and the rutting or wheel mark(shift) has compaction and stability evolution trend since the external load is less than a critical value.