不同排水方式下沥青路面积水影响因素分析  

Analysis of Influencing Factors of Asphalt Pavement Surface Water under Different Drainage Methods

作　　者：王振龙 王笑 倪栋[2] 邵社刚[2] WANG Zhenlong;WANG Xiao;NI Dong;SHAO Shegang(Guangdong Huiqing Expressway Co.,Ltd.,Guangzhou Guangdong 510900,China;Research Institute of Highway Ministry of Transport,Beijing 100088,China)

机构地区：[1]广东惠清高速公路有限公司,广东广州510900 [2]交通运输部公路科学研究院,北京100088

出　　处：《交通节能与环保》2023年第5期197-202,共6页Transport Energy Conservation & Environmental Protection

摘　　要：为阐明不同排水方式下路面积水时空变化的影响机理,采用二维浅水方程构建了沥青路面降雨径流水动力数学模型,结合实际降雨条件下沥青路面监测点的水深变化进行了模型验证,模拟值与实测值拟合较好。应用该模型先后模拟了直线段沥青路面集中排水与漫流排水条件下的路面积水分布。采用正交试验法,分析了集中排水与漫流排水条件下路面横坡、纵坡、宽度及坡长对路面积水的敏感性。结果表明,集中排水条件下,各个影响因素对指标最大积水深度hmax的敏感性由强至弱分别为:路面宽度>坡长>纵坡>横坡;漫流排水条件下,各个影响因素对指标最大积水深度hmax的敏感性由强至弱分别为:横坡>路面宽度>纵坡>坡长。两种排水方式条件下断面水深变化曲线呈“V”形或“U”形,变化趋势基本相同,均沿道路横坡方向,离路面中线越远,水深越大,尤其是集中排水条件,在道路两侧形成了明显的壅水区,积水深度远远大于漫流排水条件。因此,为保证行车安全,集中排水条件下路段可适当增加纵坡来加快路面排水,漫流排水路段可适当增加横坡来加快路面排水。In order to clarify the influence mechanism of the temporal and spatial variation of pavement water under different drainage methods,a hydrodynamic model of rainfall runoff on asphalt pavement was developed by using two-dimensional shallow water equations.The model was verified with water depth variation of asphalt pavement monitoring points under the actual rainfall condition.The simulated results agree well with the measured.Then this model is applied to simulate water depth distribution on asphalt pavement under the condition of concentrated drainage and overflow drainage.The orthogonal test method was used to analyze the sensitivity of pavement cross slope,longitudinal slope,width and slope length to pavement water under the condition of centralized drainage and overflow drainage.The results shows that the sensitivity of each influencing factor to the maximum water depthℎmax from strong to weak is:pavement width>slope length>longitudinal slope>transverse slope under concentrated drainage condition.Under overflow drainage condition,the sensitivity of each influencing factor to the maximum water depthℎmax from strong to weak is:transverse slope>pavement width>longitudinal slope>slope length.Under both drainage patterns,the section water depth curve appears"V"shape or"U"shape,and the variation trend is basically the same.Along the cross slope direction,the farther away from median line of the pavement,the greater the water depth,especially under concentrated drainage condition,the obvious backwater area is formed on both sides of the pavement,and the water depth is far greater than that under overflow drainage condition.Therefore,in order to ensure driving safety,longitudinal slope can be appropriately increased to speed up water drainage under concentrated drainage condition,while cross slope can be appropriately increased to speed up water drainage under overflow drainage condition.

关 键 词：沥青路面 积水 集中排水 漫流排水 路面几何参数 敏感性分析 

分 类 号：U416.217[交通运输工程—道路与铁道工程]