超载作用下沥青路面使用性能的衰变

为了研究超载对路面使用性能的影响,利用自动化检测设备,对北京市某区干线公路路面损坏状况进行了连续3年的跟踪观测,并对超载引起的设计年限内累计当量轴次增长量进行了计算分析.研究结果表明：在自然环境和养护条件相同的情况下,超载多发路段路况衰减速度明显快于无超载现象路段,超载是沥青路面使用性能下降的重要原因,并导致沥青路面的实际使用寿命大幅缩短.

Decay of Asphalt Pavement Performance Under Action of Overload

In order to study the influence of overload on pavement performance, the paper has tracked the damage condition of the road pavement in a district of Beijing for three years by automatic detection de- vice, and then analyzed the growth of accumulative equivalent axle in the design life which was caused by overload. The results show that the roads with overload decay faster than that without overload in the same natural and curing conditions. The overload is the important reason for the declining of asphalt pave- ment performance which shortens the actual service life of asphalt pavement.