多孔沥青路面渗水性能衰减规律研究

Study of Attenuation Rules for Seepage Performance in Porous Asphalt Mixture

建立了多孔沥青路面渗水系数衰变模型,用于预测路面不同位置轮迹带与非轮迹带渗水系数随使用时间的变化规律。研究表明,随着使用时间的增加,多孔沥青路面不同位置的渗水系数都在下降,其中外侧路面渗水系数下降较快;同时轮迹带渗水系数的下降速度也快于非轮迹带,使用时间越长,轮迹带与非轮迹带渗水系数的差距也越大。因此对于车道较多、宽度较大的多孔沥青路面,轮迹带与外侧车道的渗水系数是检测与养护的重点。

A porous asphalt pavement seepage coefficient decay model is established and used to predict the variation regulations of seepage coefficient with the use of time for the different positions of the wheel tracks and non-wheel tracks. Research shows that the seepage coefficient of porous asphalt pavement declines with the increasing service time, and the seepage coefficient for the outer surface declines much faster, and the seepage coefficient of the wheel track declines faster than that of non-wheel tracks~ the gap of seepage coefficient between wheel tracks and non-wheel tracks becomes greater with the service time; hence for the porous asphalt pavement with more lanes and wider width, the focal point of road detection and maintenance of seepage coefficient is on the wheel tracks and outer lanes.