降雨环境下公路超高段优化过渡设计方法研究  

Study on optimal transition design method of highway superelevation section under rainfall environment

作　　者：陈志豪 葛航 张国庆 范得民 许加响 CHEN Zhihao;GE Hang;ZHANG Guoqing;FAN Demin;XU Jiaxiang(School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Siyang Transportation Key Engineering Construction Service Center,Suqian,Jiangsu 223700,China)

机构地区：[1]中国矿业大学力学与土木工程学院,江苏徐州221116 [2]泗阳县交通重点工程建设服务中心,江苏宿迁223700

出　　处：《江苏建筑职业技术学院学报》2024年第2期13-18,共6页Journal Of Jiangsu Vocational Institute of Architectural Technology

基　　金：343国道泗阳来安至众兴段课题研究项目“高等级公路超高过渡段行车安全保障控制技术应用研究”。

摘　　要：针对降雨环境下高等级公路超高过渡段行车安全的问题,对高等级公路超高过渡段的优化过渡设计方法进行研究。依托343国道泗阳来安至众兴段工程,采用纬地道路设计软件进行降雨模拟,对比分析三次曲线超高过渡方式与线性超高过渡方式分别在不同降雨条件、纵坡和过渡段长度等因素影响下的路面积水状况。结果表明:随着降雨强度和过渡段长度的增加,超高过渡段外侧路面积水情况将会加重,而纵坡坡度的增加,更有利于路面积水沿着纵坡方向排出,为此,尽量设计较大的纵坡坡度以及较短的过渡段长度更有利于超高过渡段路面的排水;纵坡和超高过渡段较小时路面最大水膜厚度的位置大多出现在最外侧车道,随着纵坡和超高过渡段的增加,路面最大水膜厚度位置逐渐向中央分隔带边缘线移动;一般而言,由于三次曲线超高过渡方式在横坡为零附近超高渐变率较大,更有利于路面排水,因此,该过渡方式的行车安全性优于线性超高过渡方式。Aiming at the problem of traffic safety in superelevation transition section of highgrade highway under rainy condition,the optimal transition design method of superelevation section of high-grade highway is studied.Based on the project of Siyang Lai'an to Zhongxing section of National Highway 343,Hint CAD software was used to simulate the rainfall,and the water accumulation of the cubic curve superelevation transition mode and the linear superelevation transition mode were compared and analyzed under different rainfall conditions,longitudinal slope gradient and the length of the superelevation transition section.The results show that with the increase of rainfall intensity and the length of transition section,the water situation on the outer side of the superelevation transition section will worsen,and the increase of the longitudinal slope gradient is more conducive to the drainage of the road water along the direction of longitudinal slope.Therefore,the design of a larger longitudinal slope gradient and a shorter transition section length as far as possible is more conducive to the drainage of the superelevation transition section When the longitudinal slope gradient and superelevation transition section length are smaller,the maximum water film thickness of the road mostly appears in the outermost lane.With the increase of the longitudinal slope gradient and superelevation transition section length,the maximum water film thickness of the road gradually moves to the edge line of the central separation zone.Generally speaking,the cubic curve superelevation transition mode is better than the linear superelevation transition mode in driving safety because the superelevation transition rate is larger near the transverse slope is zero,and it is more conducive to road drainage.

关 键 词：超高过渡段 路面积水 三次曲线 降雨模拟 水膜厚度 危险路段长度 

分 类 号：U412.36[交通运输工程—道路与铁道工程]