基于Fluent仿真的宽幅路面排水路径长度与水膜厚度研究  

Study on drainage path length and water film thickness of wide pavement based on Fluent simulation

作　　者：骆保国 陈旭[2] 李旭华 王国华 程正刚 任晓玮 胡涛 LUO Baoguo;CHEN Xu;LI Xuhua;WANG Guohua;CHENG Zhenggang;REN Xiaowei;HU Tao(Guangdong Provincial Expressway Development Co.,Ltd.,Guangzhou Guangdong 510440,China;Guangdong Fokai Speedway Co.,Ltd.,Foshan Guangdong 528051,China;Guangdong Communication Planning&Design Institute Group Co.,Ltd.,Guangzhou Guangdong 510507,China)

机构地区：[1]广东省高速公路发展股份有限公司,广东广州510440 [2]广东省高速公路发展股份有限公司佛开分公司,广东佛山528051 [3]广东省交通规划设计研究院集团股份有限公司,广东广州510507

出　　处：《广东公路交通》2024年第3期1-8,14,共9页Guangdong Highway Communications

摘　　要：与普通整体式双向四车道或六车道高速公路相比,八车道及以上宽幅高速公路具有路幅宽、流量大、排水时间长等特点,在强降雨条件下易出现路面积水。通过对同一降雨量下的S型曲线超高缓和段宽幅道路工况进行Fluent模拟,研究在不同路幅宽度、纵坡、横坡、超高渐变率下最大排水路径长度及内侧行车道水膜厚度分布的变化规律,分析线形指标对径流长度与水膜厚度影响。研究结果表明,提高超高渐变率有利于降低最大排水路径长度及行车道内侧水膜厚度;增大纵坡有利于降低行车道内侧水膜厚度,但会导致最大排水路径长度大大增加;路幅宽度增加会导致最大排水路径长度、行车道内侧水膜厚度均增大。SPSS线性回归分析结果表明,纵坡对最大排水路径、行车道内侧水膜厚度的影响最大,超高渐变率对最大排水路径、行车道内侧水膜厚度的影响最小。在宽幅超高缓和段设计过程中,仅调整线性指标组合无法使道路满足强降雨天气下的行车安全需求,建议采取特殊排水措施以降低行车风险。Compared to ordinary integral two-way four-lane or six-lane highway,eight-lane and wider-lane highways exhibit characteristics such as wider road width,larger traffic flow,long drainage time,etc.which makes them more prone to road surface water accumulation under heavy rainfall conditions.By conducting the Fluent Simulation modeling on the S-curve superelevation transitioning road sections of the wide-lane road conditions under the same rainfall amount,researching the variations of the maximum drainage path length and the distribution of the water film thickness on the inner lane under different conditions of road width,longitudinal slope,cross slope and the superelevation runoff gradual change ratio,the influences of the highway alignment design indexes on the drainage path length and the thickness of the water film on the road were analyzed.Research results suggest that increasing the superelevation gradient rate usefully reduces the maximum drainage path length and the thickness of water film on the inner side of the driving lane(inner side of the highway?).Increasing the longitudinal slope advantageously reduces the thickness of the water film on the inner side of the driving lane but significantly increases the maximum drainage path length.Increasing the road width leads to an increase in both the maximum drainage path length and the thickness of the water film on the inner side of the driving lane.SPSS linear regression analysis indicates that the longitudinal slope has the most significant impact on the maximum drainage path length and the thickness of the water film on the inner side of the driving lane,while the superelevation runoff gradual change ratio has the least impact.In the design process of wide-lane superelevation runoff,adjusting the linear index combination alone may not meet the safety requirements for driving during heavy rainfall conditions.It is recommended that conducting special drainage measures to reduce driving risks.

关 键 词：Fluent仿真模拟 道路线形指标 宽幅高速公路 

分 类 号：U417.3[交通运输工程—道路与铁道工程]