多孔沥青路面路用性能跟踪检测

Pavement performance tracking and testing of porous asphalt pavement

对比和分析了广东省高速公路多孔沥青路面近年抗滑、渗水及降噪性能变化状况,研究了多孔沥青路面铺设前后路段交通事故降低幅度,测试了车道不同位置的路面渗水系数,并使用新的试验方法来测试和评价多孔沥青路面的侧向排水能力。结果表明:小粒径多孔沥青路面初始抗滑性能相对较好,但工后两年抗滑性能开始下降;大粒径多孔沥青路面工后两年抗滑性能继续呈现上升趋势。小粒径多孔沥青路面渗水系数衰减速度快于大粒径多孔沥青路面。车辆轮迹带排水性能优于轮迹带中间及路肩处;大粒径多孔沥青路面厚度是小粒径多孔沥青路面的2倍,但侧向排水能力相差2.39倍。多孔沥青路面铺设后,晴天事故数减少64.3%,雨天事故数减少57.1%,总事故数减少59.5%;多孔沥青路面对改善高速公路排水困难点的交通安全具有积极作用。本文可为新建和养护排水沥青路面的工程决策提供参考。

In this paper,changes of skid resistance,water seepage and noise reduction performance of drainage asphalt pavement in Guangdong Province in recent years were compared and analyzed.The reduction ranges of road traffic accidents before and after the construction of drainage asphalt pavement were studied and the water seepage coefficients in different positions of drainage asphalt pavement lanes were tested.A new test method to test and evaluate the lateral drainage capacity of drainage asphalt pavement was put forward.The results show that the initial anti-sliding performance of the small particle drainage asphalt pavement is relatively high,but the anti-sliding performance begins to decline two years after construction.The anti-sliding performance of large particle drainage asphalt pavement continues to show an upward trend after two years of construction.The attenuation of water permeability coefficient of small particle size drainage asphalt pavement is faster than that of the large particle size drainage asphalt pavement.The water seepage performance of the vehicle wheel track belt is greater than that of the middle of the wheel track belt and the road shoulder.The thickness of the drainage asphalt pavement with large particle size is twice of that with small particle size,but its lateral drainage capacity is 2.39 times of that with small particle size.After the paving of the drainage asphalt pavement,the number of accidents in sunny days,rainy days and in all of the days in the statistical sections were reduced by 64.3%,57.1% and 59.5% respectively.Drainage asphalt pavement plays a positive role in improving the traffic safety of drainage difficult points in expressways.This paper can provide reference for engineering decision in the construction and maintenance of drainage asphalt pavements.