公路与城市道路竖曲线最小半径差异分析  

Analysis of Minimum Radius of Vertical Curve of Highway and Urban Road

作　　者：陈旭[1] 吴瑞麟[1] 邓海龙[2] 许天会[2] 胡祖敏 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]中交第二公路勘察设计研究院有限公司,湖北武汉430056

出　　处：《土木工程与管理学报》2018年第1期158-163,共6页Journal of Civil Engineering and Management

摘　　要：本文针对我国公路与城市道路规范中竖曲线极限最小半径指标的差异性进行比较分析,指出了两种规范差异的存在是不合理的,并从影响竖曲线极限最小半径的因素进行分析发现了差异性存在的主要原因是两种规范在保证停车视距方面相关参数取值和计算公式不同。文章对两种规范现行的停车视距的计算方法进行统一,明确了不同设计速度下停车视距中的反应时间,制动距离和安全距离的取值,并提出了新的停车视距推荐值。同时文中计算发现凹形竖曲线极限最小半径控制因素为夜间停车视距而不是缓和冲击。最后根据文中计算结果给出了新的公路与城市道路统一的竖曲线极限最小半径推荐值。The study compared and analyzed the difference of highway and urban road specifications limit minimum radius of vertical curve in our country. The existence of the two normative differences is unreasonable was pointed out,and the reason of which is the difference of some correlative parameters value and calculating methods with regard to mitigating the impact in the vertical curve of vehicles and ensuring an adequate stopping sight distance. In this paper the methods of calculating the sight distance in current two specifications were unified. The value of reaction time,braking distance,and safety distance of the stopping sight distance in different design speed were clarified,and the new recommended value of stopping sight distance was put forward. In addition,it was found that the minimum radius control factor of the concave vertical is the nighttime stopping sight distance rather than mitigating the impact in the vertical curve of vehicles. Finally,according to the calculation results of the paper,the new recommended value of the minimum radius index of vertical curve of highway and urban road were given.

关 键 词：竖曲线极限最小半径 停车视距 停车制动距离 道路工程 

分 类 号：U412.3[交通运输工程—道路与铁道工程]