透水沥青路面在海绵城市中的应用

Application of Permeable Asphalt Pavement in Sponge City

为解决路表积水对交通的影响,缓解强降雨时排水管网的压力,通过室内试验及数值模拟的方法研究透水路面。首先进行了沥青混凝土透水面层和沥青稳定碎石透水基层混合料配合比设计,得到了目标空隙率下的渗水系数,验证了目标空隙率下的路用性能。然后通过数值方法计算了7.5m道路宽度下透水路面结构所具有的极限排水能力,以及所能承担的最大降雨量。研究结果表明:透水沥青路面结构可作为海绵城市的排水工程设施。

In order to address the effect of water accumulation on road surface and relieve the pressure of drainage network during heavy rainfall,the permeable pavement was studied by laboratory test and numerical simulation.The mixture ratio of permeable asphalt concrete surface and asphalt stabilized macadam base was designed.The coefficient of permeability under the target air void was obtained,and the road performance was verified.The ultimate drainage capacity of the 7.5 m width permeable pavement and the maximum rainfall it can hold were calculated.The research concludes that the permeable asphalt pavement can be used as the drainage facility of the sponge city.