城市地下道路平曲线路段车辆行驶特性研究  

Research on Vehicle Driving Characteristics of Urban Underground Road Horizontal Curve Section

作　　者：杨旻皓 YANG Min-hao(Shanghai Urban Construction Design&Research InstituteCo.,Ltd.,Shanghai 200125,China)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《中国市政工程》2021年第3期8-11,116,117,共6页China Municipal Engineering

摘　　要：因受到地下空间限制影响,城市地下道路在线形设计时会采用部分极限指标,出现小半径、大纵坡等情况,在地下道路行车状态叠加下,往往会有行车风险。针对某地下道路实际工程,开展高仿真度驾驶模拟试验,研究车辆在不同平曲线半径下的速度、横向偏移等运行特性。通过数据对比发现,在半径较小时,车辆速度逐渐降低,横向偏移不断变化;当半径较大时,车辆速度保持稳定或逐渐增加,横向偏移可以较快调整至稳定状态。研究发现,曲线半径与车辆速度呈正相关,与横向偏移呈负相关;当曲线半径大于750 m时,速度明显提升,可将750 m小半径曲线不设超高划分阈值,为地下道路安全评价及地下道路路线设计提供一定的理论依据。Due to the limitation of underground space,urban underground roads will adopt some limit indicators when designing the linear shape of urban underground roads,such as small radius,large longitudinal slope,etc.Under the superposition of underground road driving conditions,there are often driving risks.According to the actual project of an underground road,the driving simulation test with high degree of simulation is carried out to study the running characteristics of the vehicle,such as speed&lateral offset under different horizontal curve radius.Through the data comparison,it is found that when the radius is small,the vehicle speed gradually decreases,and the lateral offset constantly changes;when the radius is large,the vehicle speed keeps stable or increases gradually,and the lateral offset can be quickly adjusted to a stable state.It is found that the curve radius has a positive correlation with vehicle speed and a negative correlation with lateral offset;when the radius of the curve is greater than 750 m,the speed is significantly improved.The 750 m curve with small radius can be divided without super elevation threshold,which may provide a theoretical basis for the safety evaluation&route design of underground roads.

关 键 词：城市地下道路 驾驶模拟 小半径曲线 横向偏移 车辆行驶特性 

分 类 号：U491[交通运输工程—交通运输规划与管理]