山区低等级公路急弯路段车辆纵向加速度特性  

Longitudinal Acceleration Characteristics of Vehicles on Sharp Turns Section in Low Grade Highways of Mountainous Areas

作　　者：覃胜 于国岳 王芳菲 陈海源 徐进[2,3] QIN Sheng;YU Guoyue;WANG Fangfei;CHEN Haiyuan;XU Jin(Chongqing Urban Comprehensive Transportation Hub(Group)Co.,Ltd.,Chongqing 400041 China;Chongqing Jiaotong University School of Transportation,Chongqing 400041 China;Chongqing Key Laboratory for Human-Vehicle-Road Coordination and Safety of Complex Road Environment in Mountainous Areas,Chongqing 400074 China)

机构地区：[1]重庆城市综合交通枢纽(集团)有限公司,重庆400041 [2]重庆交通大学交通运输学院,重庆400041 [3]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400074

出　　处：《西华大学学报(自然科学版)》2025年第2期60-69,共10页Journal of Xihua University:Natural Science Edition

基　　金：重庆市自然科学基金面上项目(CSTB2022NSCQ-MSX1516)。

摘　　要：为分析山区低等级公路急弯路段的汽车纵向加速度特性,以国道G211线花地弯至大树子村路段为研究对象,开展里程为9.7 km的实车连续行驶试验。采集纵向加速度的连续数据,分析加速度峰值和减速度谷值在弯道的主要分布区间以及纵向加速度和减速度的均值特征,并分析平均加速度与加速长度以及平均减速度与减速长度的相关性。结果表明:纵向加速度峰值和减速度谷值在上坡方向主要分布区间分别为0.8~2.0 m/s^(2)和-1.6~-0.2 m/s^(2);在下坡方向主要分布区间分别为0.4~1.2 m/s^(2)和-3~-1.8 m/s^(2);纵向加速度峰值和减速度谷值主要分布在缓和曲线处;平均加速度与加速长度以及平均减速度绝对值与减速长度均呈负相关。本文的研究成果可为道路安全设施设计与交通安全评估提供参考。In order to clarify the longitudinal acceleration characteristics of the vehicle in the sharp bend section of the low-grade highway in the mountainous area,the section of the national Road G211 from Huadiwan to Dashuzi village was taken as the research object,and the real vehicle continuous driving test with a mileage of 9.7 km was carried out.The continuous data of longitudinal acceleration were collected,and the main distribution range of acceleration peak and deceleration valley in the curve and the mean char-acteristics of longitudinal acceleration and deceleration were analyzed.The correlation between average ac-celeration and acceleration length and the correlation between average deceleration and deceleration length were analyzed.The results show that the main distribution ranges of longitudinal acceleration peak and de-celeration valley in the uphill direction are 0.8~2.0 m/s^(2)and-1.6~-0.2 m/s^(2),respectively.In the downhill direction,the main distribution ranges are 0.4~1.2 m/s^(2)and-3~-1.8 m/s^(2),respectively.The peak value of longitudinal acceleration and the valley value of deceleration are mainly distributed at the transition curve.The average acceleration and acceleration length and the average deceleration absolute value are negatively correlated with the deceleration length.The research results of this paper can provide reference for the design of road safety facilities and traffic safety evaluation.

关 键 词：交通安全 山区公路 回头曲线 急弯路段 纵向加速度 

分 类 号：U491.2[交通运输工程—交通运输规划与管理]