山区高速公路连续长陡上坡路段线形组合设计  

Linear combination design of continuous long and steep uphill section of mountain expressway

作　　者：刘革 田敏 曹龙 阎莹[1] LIU Ge;TIAN Min;CAO Long;YAN Ying(School of Automobile,Chang′an University, Xi′an 710064,China)

机构地区：[1]长安大学汽车学院,陕西西安710064

出　　处：《山东交通学院学报》2020年第2期51-57,共7页Journal of Shandong Jiaotong University

摘　　要：针对山区高速公路缓和坡段设置不合理问题,选取六轴铰接列车作为设计车型,以20 km/h的速度折减量作为界定条件,对连续长陡上坡路段的期望坡长进行界定;以8个连续长陡上坡路段为研究对象,选择车速偏差作为安全指标,借助Trucksim仿真软件分别建立“陡缓陡”纵坡和单一坡度纵坡组合2种纵断面线形模型,仿真得到2种线形组合方案对不同比功率货车爬坡性能的影响。研究表明:设置缓和坡段对设计车辆平均速度的提升作用较小,但可在路程前段起到缓速作用,当坡度小于等于3%时,缓坡的速度恢复作用较小,当坡度大于3%时,缓和坡段可在路程中后段起到恢复速度的作用。因此,坡度较大时采用“陡缓陡”设计方案更有利于行车安全。Aiming at the unreasonable problem of the gentle slope section of the mountainous highway,the six-axis articulated train is selected as the design vehicle and the speed reduction of 20km/h is selected as the defining condition,and the expected slope length of the continuous long and steep uphill section is defined.Taking eight continuous long and steep uphill sections as the research object,the speed deviation is selected as the safety index,and the two longitudinal slope models of“steep,gentle and steep”longitudinal slope and single longitudinal slope are established respectively,and then the effects of two linear combination schemes on the climbing performance of trucks with different load ratios are simulated.The result shows that the gentle slope section has little effect on the average speed of design vehicle,but it can play a vital role in the mitigating speed in the anterior segment of the journey.When the slope is less than or equal to 3%,the speed recovery effect of the gentle slope is limited.When the slope is greater than 3%,the gentle slope can play the role of the recovery speed in the middle and posterior segment of the journey.Therefore,when the slope is large,the design scheme of“steep,gentle and steep”is more conducive to driving safety.

关 键 词：连续长陡上坡路段 Trucksim 缓和坡段 纵坡线形 

分 类 号：U412.366[交通运输工程—道路与铁道工程]