山区农路改扩建工程回头曲线极限最小半径取值研究  

A Study of Choosing the Minimum Radius for Switch-Back Curves of the Reconstruction and Expansion Projects of Rural Highways in Mountainous Areas

作　　者：谢昧思 杨年顺 XIE Meisi;YANG Nianshun(JSTI Group,Nanjing 210017,China)

机构地区：[1]苏交科集团股份有限公司,江苏南京210017

出　　处：《国防交通工程与技术》2019年第3期9-13,共5页Traffic Engineering and Technology for National Defence

摘　　要：通过对云南某县山岭重丘区农村公路实际项目的分析研究,根据现行规范取值及思路,论证分析不同回头曲线最小半径取值下机动车的通行性能。研究认为:本项目回头曲线最小半径一般最小值10 m、极限最小值8 m、局部困难路段最小值6 m。该指标为在不得已情况下谨慎采用并与强化交安等其他设计配合使用的参考取值方案。Upon the basis of an analytical study of the real projects of rural highways in mountainous areas of a certain county in Yunnan province and according to the value-choosing criteria and the thinking way of the current specifications, the passing performance of motor vehicles is demonstrated under the conditions of different minimum radii for switch-back curves. The result of our study shows that the general minimum radius for switch-back curves of this project is 10 m, the limited minimum radius is 8 m, and for certain local difficult sections the minimum radius of 6 m might be considered. The values above should not be used unless there is no other choice and they should be used very cautiously. Once the minimum radius is used for other projects, the schemes of enhancing traffic safety facilities and other matching designs should be adopted at the same time.

关 键 词：农村公路 路线设计 回头曲线 极限最小半径 

分 类 号：U412.34[交通运输工程—道路与铁道工程]