高速公路螺旋隧道圆曲线半径建议值研究  

Research on the Recommended Circular Curve Radius for Spiral Tunnels in Expressway

作　　者：刘时雨 贺九平 张立祥 刘昌赫 奚圣宇 LIU Shi-yu;HE Jiu-ping;ZHANG Li-xiang;LIU Chang-he;XI Sheng-yu

机构地区：[1]西安长安大学工程设计研究院有限公司,陕西西安710061 [2]中国电建集团成都勘测设计研究院有限公司,四川成都611130 [3]长安大学公路学院,陕西西安710064

出　　处：《内蒙古公路与运输》2024年第4期25-30,共6页Highways & Transportation in Inner Mongolia

基　　金：四川藏区高速公路联合技术攻关专题(藏高科技2021-11)。

摘　　要：为探明山区高速公路螺旋隧道半径对车辆行驶速度和轨迹偏移的影响规律,获得圆曲线半径合理设计值,文章基于螺旋隧道典型设计参数和安全停车视距,利用驾驶模拟仿真技术与回归分析方法,通过构建四种工况(左转下坡、左转上坡、右转上坡、右转下坡)的仿真驾驶模拟场景获取行驶速度和轨迹偏移数据,分析螺旋隧道半径对车辆运行特性的影响,基于平均速度、横向偏移值以及“自解释”理论,得到螺旋隧道路段圆曲线推荐半径值。结果表明:在螺旋隧道圆曲线路段内,行驶速度呈现出下坡快于上坡、右转快于左转、半径大于930 m时速度变异系数增大等特征,且左转半径大于1 000 m、右转半径大于800 m时超速现象显著;横向偏移量呈现出下坡大于上坡、左转小于右转、随半径增大而减小等特征;螺旋隧道在左转下坡、左转上坡、右转下坡、右转上坡的工况下,推荐半径取值范围分别为640 m~880 m、630 m~870 m、630 m~840 m、620 m~820 m。研究结果可为山区高速公路螺旋隧道的平面线形设计提供参考。In order to explore the influence of the radius of spiral tunnels on vehicle driving speed and trajectory offset in mountainous expressways,and to obtain a reasonable design value of circular curve radius,this article uses driving simulation tech-nology and regression analysis methods based on typical design parameters of spiral tunnels and safe parking sight distance.By con-structing four driving simulation scenarios(left turn downhill,left turn uphill,right turn uphill,and right turn downhill)to obtain driving speed and trajectory deviation data,the influence of spiral tunnel radius on vehicle operation characteristics is analyzed.Fi-nally,based on average speed,lateral deviation value,and self-interpretation theory,the recommended radius value for circular curves in spiral tunnel sections is obtained.The results show that in the circular curve section of the spiral tunnel,the driving speed exhibits characteristics such as downhill faster than uphill,right turn faster than left turn,and an increase in speed variation coeffi-cient when the radius is greater than 930 meters.Moreover,when the left turn radius is greater than 1000 meters and the right turn radius is greater than 800 meters,the overspeed phenomenon is significant.The lateral offset shows characteristics such as downhill greater than uphill,left turn less than right turn,and decreases with the radius increasing.The recommended radius ranges for spiral tunnels under the working conditions of left turn downhill,left turn uphill,right turn downhill,and right turn uphill are 640 m-880 m,630 m-870 m,630 m-840 m,and 620 m-820 m,respectively.The research results can provide basis and suggestions for the planar design of spiral tunnels on mountainous expressways.

关 键 词：高速公路 螺旋隧道 圆曲线半径值 速度变异系数 轨迹偏移 

分 类 号：U412.33[交通运输工程—道路与铁道工程]