轻型高速公路代表性车型与纵断面设计指标研究  

Research on Typical Vehicle Types and Vertical Section Indicators of Light Expressway

作　　者：陈正委 熊文磊 高升 徐进[1,4] CHEN Zheng-wei;XIONG Wen-lei;GAO Sheng;XU Jin(School of Traffic&Transportation,Chongqing Jiaotong University,Chongqing 4ooo74,China;CCCC Second Highway Consultants Co.Ltd.,Wuhan 430056,China;Fujian Expressway Science and Technology Innovation Research Institute Co.Ltd.,Fuzhou 35000l,China;Chongqing Key Laboratory of“Human-Vehicle-Road”Cooperation and Safety for Mountain Complex Environment,Chongqing 400074,China)

机构地区：[1]重庆交通大学交通运输学院,重庆市400074 [2]中交第二公路勘察设计研究院有限公司,武汉市430056 [3]福建省高速公路科技创新研究院有限公司,福州市350001 [4]山区复杂道路环境“人-车-路”协同与安全重庆市重点实验室,重庆市400074

出　　处：《公路》2023年第9期1-11,共11页Highway

基　　金：国家自然科学基金面上项目,项目编号52172340;重庆市高校创新研究群体项目,项目编号CXQT21022。

摘　　要：为了探究轻型高速公路纵断面设计指标关键参数,依据车辆运行特性确定了轻型高速公路的通行车型。根据普遍性和不利性原则,选取了小客车的代表性车型。针对代表性车型,运用Carsim软件建立人-车-路耦合的小客车单纵坡路段爬坡仿真场景,得到代表性车型在单纵坡路段上的运动学特性,确定了控制纵断面指标的设计车辆,并以此作为确定轻型高速公路纵断面指标的依据。研究结果表明:轻型货车车载质量分布较宽、速度离散性强,与小客车运行特性差异大,出于运行效率和交通安全的考量,轻型高速公路的服务对象应限定于小客车,即小型客车(小客车);小客车代表车型为轿车、SUV和面包车;推荐选用比功率为35~40 W/kg的面包车作为轻型高速公路纵断面设计的设计车辆;根据速度衰减特性和允许速度降幅,对于轻型高速公路,设计速度为120 km/h时其最大纵坡为6%、对应的最小和最大坡长分别为300 m和1 400 m,设计速度为140 km/h时其最大纵坡为5%、对应的最小和最大坡长分别为350 m和1 300 m。In order to explore the key parameters of light expressway vertical section indicators,the traffic models of light expressway are determined according to the vehicle operation characteristics.According to the principles of universality and disadvantage,the representative models of passenger cars are selected.For the representative models,Carsim software is used to build a man-vehicle-road coupled simulation scene of passenger cars climbing in single longitudinal slope section,and the kinematics characteristics of the representative models on the single longitudinal slope section are obtained,the design vehicle controlling the profile index is determined,which is the basis for determining the profile index of light expressway.The research results show that the distribution of light trucks'on-board mass is wide,the speed dispersion is strong,and the operating characteristics of light trucks are different from those of passenger cars.In consideration of operating efficiency and traffic safety,the service objects of light highways should be limited to passenger cars,that is,small buses(passenger cars).The representative models of passenger cars are sedans,SUVs and vans.It is recommended to select a minibus with a specific power of 35~40 W/kg as the design vehicle for the profile design of light expressway.According to speed attenuation characteristics and allowable speed reduction,for light expressway,the maximum longitudinal slope is 6%at the design speed of 120 km/h,the corresponding minimum and maximum slope lengths are 300 m and 1400 m respectively,the maximum longitudinal slope is 5%at the design speed of 140 km/h,and the corresponding minimum and maximum slope lengths are 350 m and 1300 m respectively.

关 键 词：道路工程 轻型高速公路 小客车专用高速公路 纵断面 纵面线形 纵坡 设计指标 

分 类 号：U411[交通运输工程—道路与铁道工程] U412.33