半地下枢纽互通匝道隧道出口与二次分流点间安全距离

doi:10.13229/j.cnki.jdxbgxb.20231172

Abstract

Abstract:

This study aims to determining the safe distance between the exit of the semi-underground hub interchange ramp tunnel and the secondary diversion point， so as to optimize line design and conserve land. In this study， the theoretical safe distances were calculated based on the decomposition of driving behavior and kinematic equations. Data were gathered from 39 drivers at four different distances through driving simulation tests. Speed standard deviation， brake pedal force， and lane offset served as selected indicators via the MW test. Factor analysis was employed to construct a driving safety risk calculation model and quantify the risk scores under different distance. The results show that the theoretical safety distance was 164.8 meters， and the distance with the lowest driving safety risk was 250 meters.

Key words: traffic engineering, semi-underground hub interchanges, freeway tunnels, safety distances, driving simulation, driving behavior

CLC Number:

U491

Hong-cheng GE,Zhong-yin GUO,Can-can SONG,Shi-wei WANG. Safety distance between semi-underground hub interchange ramp tunnel exit and secondary diversion points[J].Journal of Jilin University(Engineering and Technology Edition), 2025, 55(7): 2223-2232.

Figures/Tables 17

Fig.1

Table 1

Calculated value of theoretical safety distance"

$L 1$	$L 2$	$L 3$	$L 4$	$L 5$	总距离
41.7	12.8	48.6	48.6	13.1	164.8

Table 1

Fig.2

Fig.3

Fig.4

Table 2

Table 3

Calculated value of actual safety distance"

距离变量/m	隧道出口运行速度/（km·h^-1）	实际 $L 1$ /m	$L 4$ 范围的 $V 85$ /（km·h^-1）	实际 $L 4$ /m	理论确认距离/m
170	53.7	44.8	46.8	45.5	58.6
200	55.2	46.0	51.0	49.6	62.7
250	58.8	49.0	53.5	52.0	65.1
300	59.2	49.3	48.5	47.2	60.3

Table 3

Fig.5

Table 4

Fig.6

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

Fig.7

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场景	均值	标准差
路线模型	8.40	0.67
结构物模型	8.21	0.83
交通工程及沿线设施模型	7.54	0.99
环境模型	7.82	1.00

指标	170 m	200 m	250 m	300 m
速度标准差	6.56×10^-10***	6.62×10^-12***	8.73×10^-9***	0.000 13***
车道偏移量	3.55×10^-11***	6.04×10^-12***	2.30×10^-10***	0.000 56***
刹车踏板力度	3.99×10^-11***	4.78×10^-13***	2.45×10^-8***	0.000 12***

指标组别	运行速度标准差MWU检验				平均车道偏移量MWU检验				平均刹车踏板力度MWU检验
指标组别	170 m	200 m	250 m	300 m	170 m	200 m	250 m	300 m	170 m	200 m	250 m	300 m
170 m	-	0.118	0.020*	0.774	-	0.073	0.078	0.000***	-	0.140	0.142	0.022*
200 m	0.118	-	0.456	0.125	0.073	-	0.762	0.009**	0.140	-	0.924	0.587
250 m	0.020*	0.456	-	0.028*	0.078	0.762	-	0.228	0.142	0.924	-	0.463
300 m	0.774	0.125	0.028*	-	0.000***	0.009**	0.228	-	0.022*	0.587	0.463	-

KMO检验值		0.689
Bartlett球形检验	近似卡方	94.014
	自由度	3
	显著性	0.000

变量	初始	提取
运行速度标准差/（km·h^-1）	1.000	0.933
平均车道偏移量/m	1.000	1.000
平均刹车踏板力度/（da·N）	1.000	0.933

Safety distance between semi-underground hub interchange ramp tunnel exit and secondary diversion points

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