吉林大学学报(工学版) ›› 2021, Vol. 51 ›› Issue (2): 575-582.doi: 10.13229/j.cnki.jdxbgxb20200032

• 交通运输工程·土木工程 • 上一篇    

荒漠长直线段公路行驶速度微观模型建立及分析

王芳(),胡佳,景升,程伟,赫小英,李晓光   

  1. 宁夏大学 土木与水利工程学院,银川 750021
  • 收稿日期:2020-01-14 出版日期:2021-03-01 发布日期:2021-02-09
  • 作者简介:王芳(1982-),女,副教授,博士.研究方向:道路交通安全与路线设计.E-mail:wangfang@nxu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51468051);宁夏交通运输厅科技项目(021500000236)

Modeling and analysis of road speed micro model in long straight line section of desert

Fang WANG(),Jia HU,Sheng JING,Wei CHENG,Xiao-ying HE,Xiao-guang LI   

  1. School of Civil Engineering and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China
  • Received:2020-01-14 Online:2021-03-01 Published:2021-02-09

摘要:

为探究荒漠长直线段车辆行驶速度微观变化,本文采集了宁夏境内荒漠草原公路乌玛高速及国道110的直线段线形数据及驾驶员在自由流下的行驶速度。为减少分析过程中冗余因素的干扰,假设驾驶员在直线段行驶速度模型分为加速、匀速和减速阶段,分别回归分析与驾驶员最大行驶速度相关的参数,进而建立荒漠长直线段行驶速度微观模型;进一步,考虑长直线段纵断面上、下坡方向在[2%,3%]坡度内的速度模型修正,提出上、下坡路段速度修正模型;最后,通过对比公路实测运行速度与模型速度,确定了行驶速度模型的有效性和可靠性。研究结果为荒漠草原公路长直线段线形设计和速度控制提供了理论依据。

关键词: 荒漠公路, 长直线段, 回归分析, 行驶速度模型

Abstract:

In order to explore the running speed mesoscopic change of vehicles in the long line segment of desert steppe, the lines’ alignment elements data and the running speed of the vehicles under free-flow are collected in Wuhai-Maqing expressway and national trunk highway 110 in Ningxia. First, in order to reduce the interference of redundant factors in the analysis process, it is assumed that the vehicles’ running speed model in the straight segment is divided into acceleration, constant speed and deceleration. Second, and the parameters related to the max driving speed are regressed and analyzed respectively. Third, the mesoscopic model of the running speed is established in the straight segment of the desert grassland. Furthermore, considering the changes of the longitudinal section and downhill of the long straight section within the slope [2%, 3%], the velocity models of the uphill and downhill sections are modified, respectively. Finally, the effectiveness and reliability of the running speed models are determined by comparing the measured running speed with the model speed of the road. The conclusions of this study provide theoretical basis for the highway alignment design and speed control of long line segment of desert steppe highway.

Key words: desert highway, long line segment, regression analysis, running speed model

中图分类号: 

  • U41

图1

试验路段驾驶员在直线段上行驶车速变化图"

图2

直线段驾驶员行驶速度假设模型"

表1

试验路段样本表"

路段方向设计速度 /(km·h-1坡度 /%

直线段最

大长度/m

直线段最小长度/m
国道110银川-青铜峡802~3.72495028
青铜峡-银川2~5.52
乌玛高速银川-大武口1202~3.80500053
大武口-青铜峡2~3.77

图3

驾驶员正常行车过程的特殊行为"

图4

驶入直线段前6 s平均速度受前接平曲线半径影响"

图5

直线段最大行驶速度与驶出直线速度"

表2

不同直线段长度下的最大行驶车速及对应行驶时间(N=36)"

直线长度 /mVmax/(km·h-1)t1/s直线长度 /mVmax/(km·h-1)t1/s
1342124.713706128.77
1012126.774247130.722
1940119.7152390130.315
2249138202003125.319
125512515495125.73
107511999401209
942113.710910111.78
663115.541062120.25
1735117171100118.78
10451137202662
645116.310450807
106211715405894
1438126.724202752
1135125.710557804
2194121.32229174.54
1040125.32013863.55
1922127.718138725
708125.37291694

图6

直线段第N秒瞬时速度和前N秒累计速度比较"

图7

减速行驶时间与直线段长度的关系图"

图8

减速行驶时间与速度差关系"

图9

模型残差检验图"

图10

纵坡小于2%时行驶速度与纵坡度的关系图"

图11

同一直线段上、下行速度比较图"

表3

直线段行驶速度修正模型"

纵坡坡度速度调整
上坡坡度[2%,3%]Vs=0.956V
坡度[3%,4%]降低5 km/h/1000 m,直至最低运行速度
坡度>4%降低8 km/h/1000 m,直至最低运行速度
下坡坡度[2%,3%]Vx=1.045V
坡度[3%,4%]增加10 km/h/500 m,直至期望速度
坡度>4%增加10 km/h/500 m,直至期望速度

表4

不同长度直线段测试值和模型值比较"

直线段长度:4247 m测试点(纵坡:0.17%~0.33%)
距离起点200 m400 m600 m800 m
测试值129132135131129
模型值124127130.3333126.3333124
Vm-Vc5.962.092.121.011.60
距离1000 m1200 m1400 m1600 m1800 m
测试值125124.3333126.3333128127.6667
模型值120119.3333121.3333123122.6667
Vm-Vc5.05.05.05.05.0
距离2000 m2200 m2400 m2600 m2800 m
测试值128128130131128
模型值129.2106128.9784128.7463128.5141128.282
Vm-Vc1.210.981.241.490.28
距离3000 m3200 m3400 m3600 m3800 m
测试值125.00124.67122.67122.33123.33
模型值128.0498127.8176127.5855127.3533127.1212
Vm-Vc3.053.154.925.023.79
距离4000 m4200 m终点
测试值123.67123.33124.33
模型值126.889126.6569125.9604
Vm-Vc3.223.321.63
直线段长度:910 m测试点(纵坡:0.17%~0.33%)
距离起点200 m400 m600 m910 m
测试值109110111.6667111111.3333
模型值103.925105.05107.1653105.49104.57
Vm-Vc5.064.954.505.516.76
直线段长度:557 m测试点(纵坡:2.43%)
距离起点100 m200 m300 m终点557
测试值6067737270
模型值67.91273.82872.9772.177670.655
Vm-Vc7.916.830.030.180.66
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