纵坡和超高渐变率对超高过渡段水膜影响分析  

Analysis on Influence of Longitudinal Slope and Ultra-high Gradient on Water Film in Ultra-high Transition Section

作　　者：程正刚 CHENG Zhenggang

机构地区：[1]广东省交通规划设计院集团股份有限公司,广东广州510507

出　　处：《城市道桥与防洪》2024年第11期87-90,M0010,共5页Urban Roads Bridges & Flood Control

摘　　要：在降雨天气下,高速公路超高过渡段发生交通事故的概率明显偏高于其他路段,为了探究其原因并提出相应的对策措施,通过研究华南沿海多雨地区一条高速公路的交通事故资料,对事故发生时间、形态、空间分布等情况进行了整理分析,发现超高渐变段路面更易形成较厚水膜且分布复杂,因此路面抗滑能力降低引起车辆侧滑,是事故发生的重要原因之一。从纵坡和超高渐变率的因素,仿真分析水膜平面分布、水膜厚度分布特征,并提出改善措施,为提升雨天超高过渡段行车安全提供技术参考。In rainy weather,the probability of traffic accidents in the ultra-high transition section of expressway is obviously higher than that in other road sections.In order to explore the causes and put forward the corresponding countermeasures,by studying the traffic accident data of an expressway in a rainy area along the coast of South China,the time,form and spatial distribution of the accidents are sorted out and analyzed.It is found that the pavements in the ultra-high gradient section are easily formed of the thicker water film,which is complexly distributed.Therefore,the sideslip of vehicle caused by the reduction of the anti-skid ability of pavement is one of the important reasons for the accidents.The characteristics of the plane distribution and thickness distribution of the water film are simulated and analyzed from the factors of longitudinal slope and ultra-high gradient.And the improvement measures are proposed to provide a technical reference for improving the driving safety of the ultra-high transition section in rainy days.

关 键 词：雨天行车安全 高速公路 超高过渡段 水膜厚度 对策 

分 类 号：U412[交通运输工程—道路与铁道工程]