高速公路圆曲线超高及过渡段设计研究  

Study on Design of Expressway Circular Curve Superelevation and Transition Section

作　　者：王贵山[1] 胡昌亮[1] 白浩晨[1] 李瑞杰 WANG Gui-shan;HU Chang-liang;BAI Hao-chen;LI Rui-jie(CCCC First Highway Consultants Co.,Ltd.,Xi'an Shaanxi 710075,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710075

出　　处：《公路交通科技》2021年第12期47-55,共9页Journal of Highway and Transportation Research and Development

基　　金：中交科技基金项目(KCJJ2018-05)。

摘　　要：为合理进行圆曲线超高取值和过渡段设计,结合分车道分车型管理规范,从圆曲线超高规范设计要求及理论分析研究出发,通过公式推导及实际工程经验,提出了多车道高速公路圆曲线超高双路拱设置方法、内外侧车道超高取值的建议值。结合工程项目实际运用经验,对缓和曲线取值、超高过渡段位置提出了建议。结果表明:基于横向力系数的超高设置方法具有较大的安全性;为保证排水通畅,应灵活运用缓和曲线的规范规定,尽量将缓和曲线取短;缓和曲线较短的基本形曲线,全超高起终点宜设在缓圆点或圆缓点,之后按照满足规范的超高渐变率渐变;为防止渐变率过小、排水不畅,缓和曲线较长的基本型曲线,宜选取缓和曲线中间一段作为超高过渡段;S型曲线的超高过渡段设置,宜将公切点超高值设为0%,然后两侧分别按要求进行超高过渡;建议多车道高速公路新增路拱线设置在两相邻行车道之间;八车道高速公路及六车道高速公路纵坡值偏小、凹曲线底部排水不畅路段,超高设计宜采用双路拱的渐变方式。提出了圆曲线超高合理取值原则,总结了超高过渡段的设置方法,为圆曲线超高及过渡段设计提供了参考。In order to design the circular curve superelevation and the transition section reasonably,according to the management specification of different lanes and vehicle types,considering the design requirements and theoretical analysis of circular curve superelevation specification,the double road camber circular curve superelevation of multi-lane expressway and the suggested superelevation value of inner and outer lanes are proposed by formula derivation and practical engineering experience.Based on the practical application experience of engineering projects,the suggestions on the value of transition curve and the location of superelevation transition section are put forward.The result shows that(1)the determining method of superelevation value based on transverse force coefficient has great safety;(2)In order to ensure the smooth drainage,The specification of transition curve shall be flexibly used to shorten the transition curve as far as possible;(3)for the basic curve with shorter transition curve length,the starting and ending points of full superelevation should be set at the gentle circular point or circular gentle point,and then the superelevation gradient should be made according to the specification gradient rate requirement;(4)to prevent too small gradient rate and poor drainage,for the basic curve with long transition curve length,the superelevation transition section should be set at the middle section of the transition curve;(5)for the S curve,the superelevation value on the common tangent point should be set to 0 at first,and then superelevation gradient should be made at the both sides of common tangent point according to the requirement;(6)it is suggested that the road camber line of multi-lane expressway should be set between 2 adjacent lanes;(7)for the sections with small longitudinal slope value and poor drainage at the bottom of concave curve of 8-lane and 6-lane expresswayS,the gradient mode of double road cambers should be adopted.The reasonable value principle of circular curve superelevation

关 键 词：道路工程 设计参数 工程经验 圆曲线超高 过渡段设计 

分 类 号：U412[交通运输工程—道路与铁道工程]