考虑路面-轮胎-径流耦合作用的高速公路超宽路面排水设计  

Super-wide Expressway Pavement Drainage Design Considering Road-tire-runoff Coupling Effect

作　　者：高雪池 毕玉峰 季晓歌 郑志峰 张军辉 GAO Xue-chi;BI Yu-feng;JI Xiao-ge;ZHENG Zhi-feng;ZHANG Jun-hui(Shandong High-speed Group Co.,Ltd.,Jinan,Shandong 250101,China;Shandong High-Speed Group Innovation Research Institute,Jinan,Shandong 250014,China;School of Traffic&Transportation Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China)

机构地区：[1]山东高速集团有限公司,山东济南250101 [2]山东高速集团有限公司创新研究院,山东济南250014 [3]长沙理工大学交通运输工程学院,湖南长沙410114

出　　处：《公路交通科技》2024年第11期94-103,共10页Journal of Highway and Transportation Research and Development

基　　金：国家重点研发计划项目(2022YFB2601900)。

摘　　要：改扩建道路日益增多,道路的拓宽导致雨水难以快速排出路表,滞留的积水导致车辆在制动、转弯时容易出现滑水现象,严重影响行车安全。为降低雨天超宽路面水膜厚度,保障雨天行车安全,进行了路面排水结构的布局设计分析。基于ANSYS软件建立了路面-轮胎-径流简化模型开展动水压力计算,得到行车速度为80,100,120 km/h时动水压力与水膜厚度的关系式,并计算出3种速度下的临界水膜厚度值。分析了降雨强度、路拱横坡度、路面宽度、道路纵坡度对路面水膜厚度值的作用规律。通过对比水膜厚度计算值与临界值,针对行车安全存在隐患的路段开展排水设计,对不同布局方案的排水效果进行了评估。结果表明:设计速度为80 km/h的高速公路,路面水膜厚度若高于3.92 mm则需进行改善设计;设计速度为100 km/h的高速公路,路面水膜厚度若高于2.46 mm则需进行改善设计;设计速度为120 km/h的高速公路,路面水膜厚度若高于1.66 mm则需进行改善设计。提出了在车道标线处设置排水结构的排水结构布局方案:设计速度为80 km/h的高速公路,将横坡度设置为3%;设计速度为100 km/h的高速公路,超过双向十车道时在中间车道线处设置1个排水结构;设计速度为120 km/h的高速公路,每隔2个车道设置1个排水结构。The increasing number of road expansion and reconstruction leads to the road widening.It is difficult for rainwater to drain quickly from the road surface.The stagnant water causes vehicles to experience hydroplaning during braking and turning,significantly affecting driving safety.To reduce the water film thickness on super-wide pavement during rainy days and ensure driving safety,the design analysis on pavement drainage structure layout was conducted.Based on ANSYS software,the simplified road-tire-runoff model was established.The relation between hydrodynamic pressure and water film thickness was derived at vehicle speeds of 80,100,and 120 km/h.The critical water film thickness values were calculated with these 3 speeds.The influences of rainfall intensity,cross-slope gradient,pavement width,and longitudinal slope on the water film thickness were analyzed.By comparing the calculated water film thickness values with the critical values,the drainage designs were developed for the road sections with safety hazards.The drainage effects of different layout schemes were evaluated.The result indicates that for expressways with designed speed of 80 km/h,the improvement designs are necessary if the pavement water film thickness exceeds 3.92 mm;for expressways with designed speed of 100 km/h,the improvement designs are necessary if the pavement water film thickness exceeds 2.46 mm;and for expressways with designed speed of 120 km/h,the improvement designs are necessary if the pavement water film thickness exceeds 1.66 mm.The drainage structure layout scheme,setting drainage structures at lane markings,was proposed.For expressways with designed speed of 80 km/h,the cross-slope should be set at 3%;for expressways with designed speed of 100 km/h,a drainage structure should be placed at the center lane marking when exceeding ten-lane in both directions;and for expressways with designed speed of 120 km/h,a drainage structure should be installed every two lanes.

关 键 词：道路工程 排水结构布局设计 数值计算 超宽路面 水膜厚度 动水压力 

分 类 号：U416[交通运输工程—道路与铁道工程] U217