海绵型道路横断面排水设计参数优化

Optimization of Drainage Design Parameters for Cross Section of Sponge Road

海绵型道路有着出色的排水能力,在雨天时能较显著地提高交通安全,然而其排水设计应与道路几何设计协同考虑。基于海绵型道路路表渗流与产流的规律,建立了二维与三维路面渗流模型。模拟后的结果表明排水情况与车道数为负相关;在车道数增加的情况下,排水功能与横坡为正相关;若横坡坡度相同,纵坡的增加会延长排水路线,导致排水性能变差。基于海绵型道路排水功能保证,对海绵型道路横断面设计参数进行优化。

Sponge roads have excellent drainage capacity and can significantly improve traffic safety in rainy weather.However, the drainage design should be considered in conjunction with the geometric design of the road.In this paper, two-dimensional and three-dimensional pavement seepage models are established based on the law of seepage and runoff generation on the surface of sponge road.The results show that the drainage is negatively correlated with the number of lanes;When the number of lanes increases, the drainage function is positively correlated with the cross slope;If the cross slope is the same, the increase of longitudinal slope will extend the drainage route, resulting in poor drainage performance.Based on the drainage function guarantee of sponge road, the cross-section design parameters of sponge road are optimized.