公路隧道视距曲线半径的探讨 - 公路水运监理论坛 - 监理检测网论坛监理检测网论坛,检测网论坛,检测论坛,试验检测论坛,监理检测论坛,试验检测网,工程检测论坛,监理论坛,监理网,检测网,试验检测考试论坛,检测师考试论坛,助理试验检测师考试,试验检测师考试,试验检测考试报名,试验检测考试现场审核

查看: 2685\|回复: 0	[文章] 公路隧道视距曲线半径的探讨 [复制链接]

监理

组别爱心志愿者
帖子810
积分7010
性别
注册时间2006-01-21

个人空间

1^#

字体大小: t T

发表于 2009-06-27 09:29 |只看楼主

µ_è y~bbs.3c3t.comð·ßom0v¨A
韩熠1µ_è y~bbs.3c3t.comð·ßom0v¨A
王跟民2µ_è y~bbs.3c3t.comð·ßom0v¨A

（ 1.陕西交通技术咨询有限公司，陕西西安 710068；µ_è y~bbs.3c3t.comð·ßom0v¨A

2.陕西省林业勘察设计院，陕西西安 710082；）µ_è y~bbs.3c3t.comð·ßom0v¨A

［摘要］本文概略分析了影响隧道视距的因素，计算了隧道横净距，建立了隧道视距曲线半径的概念，提出了隧道线形设计和改善交通安全的建议。
［关键词］隧道横净距视距半径加宽
1、视距影响因素及隧道建筑限界
公路隧道几何设计、车辆几何尺寸、驾驶员、照明及自然环境、交通组成等因素，均影响隧道视距，几何设计主要包括隧道建筑限界、内轮廓、平纵线形、路拱等。为便于讨论，依据《公路工程技术标准》（JTG B01-2003）、《公路隧道设计规范》（JTG D70-2004）和《公路项目安全性评价指南》（JTG B05-2004）（分别简称《标准》、《规范》、《指南》），限定相关边界。高速公路和一级公路隧道建筑限界及横断面组成尺寸见表1，二级以下公路隧道建筑限界及横断面组成尺寸见表2。

表1µ_è y~bbs.3c3t.comð·ßom0v¨A
µ_è y~bbs.3c3t.comð·ßom0v¨A
高速、一级公路隧道建筑限界横断面组成一览表（单位：米）µ_è y~bbs.3c3t.comð·ßom0v¨A

序号µ_è y~bbs.3c3t.comð·ßom0v¨A

设计速度（km/h）µ_è y~bbs.3c3t.comð·ßom0v¨A

车道宽度Wµ_è y~bbs.3c3t.comð·ßom0v¨A

侧向宽度Lµ_è y~bbs.3c3t.comð·ßom0v¨A

最小检修道Jµ_è y~bbs.3c3t.comð·ßom0v¨A

建筑限界净空µ_è y~bbs.3c3t.comð·ßom0v¨A

左侧LLµ_è y~bbs.3c3t.comð·ßom0v¨A

右侧LRµ_è y~bbs.3c3t.comð·ßom0v¨A

左侧µ_è y~bbs.3c3t.comð·ßom0v¨A

右侧µ_è y~bbs.3c3t.comð·ßom0v¨A

净宽µ_è y~bbs.3c3t.comð·ßom0v¨A

净高µ_è y~bbs.3c3t.comð·ßom0v¨A

1µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

3.75×2µ_è y~bbs.3c3t.comð·ßom0v¨A

0.75 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.25 µ_è y~bbs.3c3t.comð·ßom0v¨A

0.75 µ_è y~bbs.3c3t.comð·ßom0v¨A

11.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

5.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

2µ_è y~bbs.3c3t.comð·ßom0v¨A

100µ_è y~bbs.3c3t.comð·ßom0v¨A

3.75×2µ_è y~bbs.3c3t.comð·ßom0v¨A

0.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

0.75 µ_è y~bbs.3c3t.comð·ßom0v¨A

10.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

5.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

3µ_è y~bbs.3c3t.comð·ßom0v¨A

80µ_è y~bbs.3c3t.comð·ßom0v¨A

3.75×2µ_è y~bbs.3c3t.comð·ßom0v¨A

0.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

0.75 µ_è y~bbs.3c3t.comð·ßom0v¨A

10.25 µ_è y~bbs.3c3t.comð·ßom0v¨A

5.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

4µ_è y~bbs.3c3t.comð·ßom0v¨A

60µ_è y~bbs.3c3t.comð·ßom0v¨A

3.75×2µ_è y~bbs.3c3t.comð·ßom0v¨A

0.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

0.75 µ_è y~bbs.3c3t.comð·ßom0v¨A

9.75 µ_è y~bbs.3c3t.comð·ßom0v¨A

5.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

表2µ_è y~bbs.3c3t.comð·ßom0v¨A
二级以下等级公路隧道建筑限界横断面组成一览表（单位：米）µ_è y~bbs.3c3t.comð·ßom0v¨A

序号µ_è y~bbs.3c3t.comð·ßom0v¨A

设计速度（km/h）µ_è y~bbs.3c3t.comð·ßom0v¨A

车道宽度Wµ_è y~bbs.3c3t.comð·ßom0v¨A

侧向宽度Lµ_è y~bbs.3c3t.comð·ßom0v¨A

最小人行道Jµ_è y~bbs.3c3t.comð·ßom0v¨A

建筑限界净空µ_è y~bbs.3c3t.comð·ßom0v¨A

左侧LLµ_è y~bbs.3c3t.comð·ßom0v¨A

右侧LRµ_è y~bbs.3c3t.comð·ßom0v¨A

左侧µ_è y~bbs.3c3t.comð·ßom0v¨A

右侧µ_è y~bbs.3c3t.comð·ßom0v¨A

净宽µ_è y~bbs.3c3t.comð·ßom0v¨A

净高µ_è y~bbs.3c3t.comð·ßom0v¨A

1µ_è y~bbs.3c3t.comð·ßom0v¨A

80二级µ_è y~bbs.3c3t.comð·ßom0v¨A

3.75×2µ_è y~bbs.3c3t.comð·ßom0v¨A

0.75 µ_è y~bbs.3c3t.comð·ßom0v¨A

10.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

5.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

2µ_è y~bbs.3c3t.comð·ßom0v¨A

60二级µ_è y~bbs.3c3t.comð·ßom0v¨A

3.50×2µ_è y~bbs.3c3t.comð·ßom0v¨A

0.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

0.75 µ_è y~bbs.3c3t.comð·ßom0v¨A

9.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

5.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

3µ_è y~bbs.3c3t.comð·ßom0v¨A

40二级µ_è y~bbs.3c3t.comð·ßom0v¨A

3.50×2µ_è y~bbs.3c3t.comð·ßom0v¨A

0.25 µ_è y~bbs.3c3t.comð·ßom0v¨A

0.75 µ_è y~bbs.3c3t.comð·ßom0v¨A

9.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

5.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

4µ_è y~bbs.3c3t.comð·ßom0v¨A

40三级µ_è y~bbs.3c3t.comð·ßom0v¨A

3.50×2µ_è y~bbs.3c3t.comð·ßom0v¨A

0.25 µ_è y~bbs.3c3t.comð·ßom0v¨A

0.75 µ_è y~bbs.3c3t.comð·ßom0v¨A

9.00 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

5µ_è y~bbs.3c3t.comð·ßom0v¨A

30三级µ_è y~bbs.3c3t.comð·ßom0v¨A

3.25×2µ_è y~bbs.3c3t.comð·ßom0v¨A

0.25 µ_è y~bbs.3c3t.comð·ßom0v¨A

7.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

6µ_è y~bbs.3c3t.comð·ßom0v¨A

20四级µ_è y~bbs.3c3t.comð·ßom0v¨A

3.00×2µ_è y~bbs.3c3t.comð·ßom0v¨A

0.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

0.25 µ_è y~bbs.3c3t.comð·ßom0v¨A

7.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.50 µ_è y~bbs.3c3t.comð·ßom0v¨A

二级公路设计速度为80和60公里/小时，隧道内人行道（兼检修道）最小宽度为1.0米，净宽分别为11米和10米，大于《标准》中最小规定值，本文采用《规范》规定值；四级公路，隧道建筑限界净宽为7.0米，小于《标准》规定最小值，本文采用《标准》7.5米的建筑限界。
2、标准车型与视距
计算车型分别选择小客车和货车，小客车宽度B为1.8米，货车宽度B为2.5米，驾驶员位于车辆左侧0.5米处。前方障碍物高均为0.1米。停车视距以小客车为标准，目高为1.2米，自驾驶员发现障碍物起，至车辆在障碍物前安全停止，所需的最短行车距离即为小客车停车视距，简称停车视距。计算货车停车视距时，驾驶员目高为2.0米。若运行速度大小与设计速度相等，依据《标准》和《指南》规定，停车视距和货车停车视距规定见表3和表4所示。

表3µ_è y~bbs.3c3t.comð·ßom0v¨A
µ_è y~bbs.3c3t.comð·ßom0v¨A
µ_è y~bbs.3c3t.comð·ßom0v¨A
µ_è y~bbs.3c3t.comð·ßom0v¨A
高速、一级公路停车视距及货车停车视距（单位：米）µ_è y~bbs.3c3t.comð·ßom0v¨A

序号µ_è y~bbs.3c3t.comð·ßom0v¨A

设计速度µ_è y~bbs.3c3t.comð·ßom0v¨A

标准停车视距µ_è y~bbs.3c3t.comð·ßom0v¨A

指南停车视距µ_è y~bbs.3c3t.comð·ßom0v¨A

标准货车µ_è y~bbs.3c3t.comð·ßom0v¨A

停车视距µ_è y~bbs.3c3t.comð·ßom0v¨A

指南货车µ_è y~bbs.3c3t.comð·ßom0v¨A

停车视距µ_è y~bbs.3c3t.comð·ßom0v¨A

《标准》修正停车货车视距µ_è y~bbs.3c3t.comð·ßom0v¨A

3％µ_è y~bbs.3c3t.comð·ßom0v¨A

4％µ_è y~bbs.3c3t.comð·ßom0v¨A

5%µ_è y~bbs.3c3t.comð·ßom0v¨A

6%µ_è y~bbs.3c3t.comð·ßom0v¨A

7％µ_è y~bbs.3c3t.comð·ßom0v¨A

8％µ_è y~bbs.3c3t.comð·ßom0v¨A

9％µ_è y~bbs.3c3t.comð·ßom0v¨A

1µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

210µ_è y~bbs.3c3t.comð·ßom0v¨A

280µ_è y~bbs.3c3t.comð·ßom0v¨A

245µ_è y~bbs.3c3t.comð·ßom0v¨A

417µ_è y~bbs.3c3t.comð·ßom0v¨A

265µ_è y~bbs.3c3t.comð·ßom0v¨A

273µ_è y~bbs.3c3t.comð·ßom0v¨A

--µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

2µ_è y~bbs.3c3t.comð·ßom0v¨A

100µ_è y~bbs.3c3t.comð·ßom0v¨A

160µ_è y~bbs.3c3t.comð·ßom0v¨A

205µ_è y~bbs.3c3t.comð·ßom0v¨A

180µ_è y~bbs.3c3t.comð·ßom0v¨A

301µ_è y~bbs.3c3t.comð·ßom0v¨A

190µ_è y~bbs.3c3t.comð·ßom0v¨A

195µ_è y~bbs.3c3t.comð·ßom0v¨A

200µ_è y~bbs.3c3t.comð·ßom0v¨A

--µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

3µ_è y~bbs.3c3t.comð·ßom0v¨A

80µ_è y~bbs.3c3t.comð·ßom0v¨A

110µ_è y~bbs.3c3t.comð·ßom0v¨A

140µ_è y~bbs.3c3t.comð·ßom0v¨A

125µ_è y~bbs.3c3t.comð·ßom0v¨A

202µ_è y~bbs.3c3t.comð·ßom0v¨A

130µ_è y~bbs.3c3t.comð·ßom0v¨A

132µ_è y~bbs.3c3t.comð·ßom0v¨A

136µ_è y~bbs.3c3t.comð·ßom0v¨A

139µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

4µ_è y~bbs.3c3t.comð·ßom0v¨A

60µ_è y~bbs.3c3t.comð·ßom0v¨A

75µ_è y~bbs.3c3t.comð·ßom0v¨A

90µ_è y~bbs.3c3t.comð·ßom0v¨A

85µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

89µ_è y~bbs.3c3t.comð·ßom0v¨A

91µ_è y~bbs.3c3t.comð·ßom0v¨A

93µ_è y~bbs.3c3t.comð·ßom0v¨A

95µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

表4

二、三、四级公路停车视距及货车停车视距（单位：米）

序号µ_è y~bbs.3c3t.comð·ßom0v¨A

设计速度µ_è y~bbs.3c3t.comð·ßom0v¨A

标准停车视距µ_è y~bbs.3c3t.comð·ßom0v¨A

指南停车视距µ_è y~bbs.3c3t.comð·ßom0v¨A

标准货车µ_è y~bbs.3c3t.comð·ßom0v¨A

停车视距µ_è y~bbs.3c3t.comð·ßom0v¨A

指南货车µ_è y~bbs.3c3t.comð·ßom0v¨A

停车视距µ_è y~bbs.3c3t.comð·ßom0v¨A

《标准》下坡修正停车货车视距µ_è y~bbs.3c3t.comð·ßom0v¨A

3％µ_è y~bbs.3c3t.comð·ßom0v¨A

4％µ_è y~bbs.3c3t.comð·ßom0v¨A

5%µ_è y~bbs.3c3t.comð·ßom0v¨A

6%µ_è y~bbs.3c3t.comð·ßom0v¨A

7％µ_è y~bbs.3c3t.comð·ßom0v¨A

8％µ_è y~bbs.3c3t.comð·ßom0v¨A

9％µ_è y~bbs.3c3t.comð·ßom0v¨A

1µ_è y~bbs.3c3t.comð·ßom0v¨A

80µ_è y~bbs.3c3t.comð·ßom0v¨A

110µ_è y~bbs.3c3t.comð·ßom0v¨A

140µ_è y~bbs.3c3t.comð·ßom0v¨A

125µ_è y~bbs.3c3t.comð·ßom0v¨A

202µ_è y~bbs.3c3t.comð·ßom0v¨A

130µ_è y~bbs.3c3t.comð·ßom0v¨A

132µ_è y~bbs.3c3t.comð·ßom0v¨A

136µ_è y~bbs.3c3t.comð·ßom0v¨A

139µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

2µ_è y~bbs.3c3t.comð·ßom0v¨A

60µ_è y~bbs.3c3t.comð·ßom0v¨A

75µ_è y~bbs.3c3t.comð·ßom0v¨A

90µ_è y~bbs.3c3t.comð·ßom0v¨A

85µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

89µ_è y~bbs.3c3t.comð·ßom0v¨A

91µ_è y~bbs.3c3t.comð·ßom0v¨A

93µ_è y~bbs.3c3t.comð·ßom0v¨A

95µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

3µ_è y~bbs.3c3t.comð·ßom0v¨A

40µ_è y~bbs.3c3t.comð·ßom0v¨A

--µ_è y~bbs.3c3t.comð·ßom0v¨A

50µ_è y~bbs.3c3t.comð·ßom0v¨A

--µ_è y~bbs.3c3t.comð·ßom0v¨A

50µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

4µ_è y~bbs.3c3t.comð·ßom0v¨A

30µ_è y~bbs.3c3t.comð·ßom0v¨A

--µ_è y~bbs.3c3t.comð·ßom0v¨A

35µ_è y~bbs.3c3t.comð·ßom0v¨A

--µ_è y~bbs.3c3t.comð·ßom0v¨A

35µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

5µ_è y~bbs.3c3t.comð·ßom0v¨A

20µ_è y~bbs.3c3t.comð·ßom0v¨A

--µ_è y~bbs.3c3t.comð·ßom0v¨A

20µ_è y~bbs.3c3t.comð·ßom0v¨A

--µ_è y~bbs.3c3t.comð·ßom0v¨A

20µ_è y~bbs.3c3t.comð·ßom0v¨A

《指南》修正了货车停车视距，纵坡大于2％，半径小于400米路段，应核查修正。上坡路段可以减小货车停车视距，下坡路段必须增大货车停车视距。
3、公路隧道横净距
当检修道（人行道，下同）高度大于0.1米，或检修道高度影响视线时，横净距（m1）应计算到检修道边缘；当隧道内壁布设有关设施影响视线时，横净距(m2)应计算至建筑限界边缘处；当隧道内壁未布设隧道设施或不影响视线时，横净距(m3)可计算至隧道内轮廓处。无论车辆在那个车道行驶，均假定车辆行驶轨迹与车道中心线重合，并假定视高处建筑限界至内轮廓距离为0.25米。依行驶方向为准，左转弯曲线隧道应计算左车道横净距，右转弯曲线应计算右车道横净距。
左车道横净距m＝(W/2－B)/2＋0.5＋L左[＋J左＋0.25]
………………………3-1
右车道横净距m＝(W/2＋B)/2－0.5＋L右[＋J右＋0.25]
………………………3-2
隧道提供的最大横净距计算结果见表5。左侧车道横净距小于右侧车道横净距，左转弯曲线隧道较右转弯曲线隧道不利于安全；左转弯隧道，为小客车提供的横净距大于为货车提供的横净距；右转弯曲线隧道，为小客车提供的横净距小于为货车提供的横净距。
表5

公路隧道提供的最大横净距（单位：m）

设计速度µ_è y~bbs.3c3t.comð·ßom0v¨A

m1µ_è y~bbs.3c3t.comð·ßom0v¨A

m2µ_è y~bbs.3c3t.comð·ßom0v¨A

m3µ_è y~bbs.3c3t.comð·ßom0v¨A

左侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

右侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

左侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

右侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

左侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

右侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

2.225 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.875 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.525 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.875 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.975 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.275 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.225 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.875 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.525 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.875 µ_è y~bbs.3c3t.comð·ßom0v¨A

100µ_è y~bbs.3c3t.comð·ßom0v¨A

1.975 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.275 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.725 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.025 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.975 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.275 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

80µ_è y~bbs.3c3t.comð·ßom0v¨A

1.975 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.025 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.725 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.775 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.125 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.975 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.025 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

60µ_è y~bbs.3c3t.comð·ßom0v¨A

1.975 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.025 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.725 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.775 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.125 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.975 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.025 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

80二µ_è y~bbs.3c3t.comð·ßom0v¨A

2.225 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.875 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.025 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.225 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.875 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.025 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.475 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.125 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.275 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

60二µ_è y~bbs.3c3t.comð·ßom0v¨A

1.850 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.500 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.650 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.000 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.850 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.500 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.650 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.000 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.100 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.750 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.900 µ_è y~bbs.3c3t.comð·ßom0v¨A

4.250 µ_è y~bbs.3c3t.comð·ßom0v¨A

40二µ_è y~bbs.3c3t.comð·ßom0v¨A

1.600 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.250 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.400 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.750 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.350 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.000 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.150 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.500 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.600 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.250 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.400 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.750 µ_è y~bbs.3c3t.comð·ßom0v¨A

40三µ_è y~bbs.3c3t.comð·ßom0v¨A

1.600 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.250 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.400 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.750 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.350 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.000 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.150 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.500 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.600 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.250 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.400 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.750 µ_è y~bbs.3c3t.comð·ßom0v¨A

30三µ_è y~bbs.3c3t.comð·ßom0v¨A

1.475 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.125 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.275 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.725 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.375 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.525 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.875 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.975 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.625 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.775 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.125 µ_è y~bbs.3c3t.comð·ßom0v¨A

20四µ_è y~bbs.3c3t.comð·ßom0v¨A

1.600 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.250 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.400 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.750 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.850 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.500 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.650 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.000 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.100 µ_è y~bbs.3c3t.comð·ßom0v¨A

1.750 µ_è y~bbs.3c3t.comð·ßom0v¨A

2.900 µ_è y~bbs.3c3t.comð·ßom0v¨A

3.250 µ_è y~bbs.3c3t.comð·ßom0v¨A

4、隧道视距平曲线半径
假定曲线隧道位于同一曲率半径的圆曲线上，曲率半径与视距、横净距的关系式为：
　……………………………4-1
式中： —实际横净距，米；
—计算车道中线处的曲线半径，米；
—（货车）停车视距，米。
依据cosα＝1－α2/2！＋α4/4！－……+(-1)nα2n/(2n)!，由公式4-1推导简化公式得4-2，可直接计算平曲线半径。两公式计算很相近，后者比前者一般大0.3～0.5米，误差可以忽略。
………………………………………4-2
隧道提供横净距越小，要求平曲线半径越大，比照路线规范，视距采用《标准》规定视距，可将检修道（m1）对应的曲率半径R1定义为隧道安全视距半径，将建筑限界(m2)对应曲率半径R2定义为隧道一般视距半径，将隧道内轮廓(m3)对应的曲率半径R3定义为隧道最小视距半径。
高速公路、一级公路为分离式单向行驶，只需考虑制动停车视距。双向行驶的二、三、四级公路，隧道路段一般禁止超车，也只考虑停车视距。表6显示货车视距半径一般大于小客车视距半径，拟定隧道曲线半径时，应采用货车视距曲线半径，但应区分左、右转弯曲线。同时考虑《指南》视距要求，确定隧道线形时，应参照表7拟定平面参数。

µ_è y~bbs.3c3t.comð·ßom0v¨A

表6µ_è y~bbs.3c3t.comð·ßom0v¨A
µ_è y~bbs.3c3t.comð·ßom0v¨A
公路隧道视距平曲线半径计算值（单位：米）µ_è y~bbs.3c3t.comð·ßom0v¨A

设计速度µ_è y~bbs.3c3t.comð·ßom0v¨A

安全视距半径R1µ_è y~bbs.3c3t.comð·ßom0v¨A

一般视距半径R2µ_è y~bbs.3c3t.comð·ßom0v¨A

最小视距半径R3µ_è y~bbs.3c3t.comð·ßom0v¨A

左侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

右侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

左侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

右侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

左侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

右侧车道µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

小车µ_è y~bbs.3c3t.comð·ßom0v¨A

货车µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

2478µ_è y~bbs.3c3t.comð·ßom0v¨A

4002µ_è y~bbs.3c3t.comð·ßom0v¨A

1564µ_è y~bbs.3c3t.comð·ßom0v¨A

1936µ_è y~bbs.3c3t.comð·ßom0v¨A

1853µ_è y~bbs.3c3t.comð·ßom0v¨A

2858µ_è y~bbs.3c3t.comð·ßom0v¨A

1289µ_è y~bbs.3c3t.comð·ßom0v¨A

1622µ_è y~bbs.3c3t.comð·ßom0v¨A

1709µ_è y~bbs.3c3t.comð·ßom0v¨A

2610µ_è y~bbs.3c3t.comð·ßom0v¨A

1218µ_è y~bbs.3c3t.comð·ßom0v¨A

1539µ_è y~bbs.3c3t.comð·ßom0v¨A

100µ_è y~bbs.3c3t.comð·ßom0v¨A

1620µ_è y~bbs.3c3t.comð·ßom0v¨A

2492µ_è y~bbs.3c3t.comð·ßom0v¨A

977µ_è y~bbs.3c3t.comð·ßom0v¨A

1117µ_è y~bbs.3c3t.comð·ßom0v¨A

1174µ_è y~bbs.3c3t.comð·ßom0v¨A

1705µ_è y~bbs.3c3t.comð·ßom0v¨A

795µ_è y~bbs.3c3t.comð·ßom0v¨A

926µ_è y~bbs.3c3t.comð·ßom0v¨A

1076µ_è y~bbs.3c3t.comð·ßom0v¨A

1543µ_è y~bbs.3c3t.comð·ßom0v¨A

749µ_è y~bbs.3c3t.comð·ßom0v¨A

876µ_è y~bbs.3c3t.comð·ßom0v¨A

80µ_è y~bbs.3c3t.comð·ßom0v¨A

766µ_è y~bbs.3c3t.comð·ßom0v¨A

1202µ_è y~bbs.3c3t.comð·ßom0v¨A

500µ_è y~bbs.3c3t.comð·ßom0v¨A

579µ_è y~bbs.3c3t.comð·ßom0v¨A

555µ_è y~bbs.3c3t.comð·ßom0v¨A

822µ_è y~bbs.3c3t.comð·ßom0v¨A

401µ_è y~bbs.3c3t.comð·ßom0v¨A

473µ_è y~bbs.3c3t.comð·ßom0v¨A

508µ_è y~bbs.3c3t.comð·ßom0v¨A

744µ_è y~bbs.3c3t.comð·ßom0v¨A

376µ_è y~bbs.3c3t.comð·ßom0v¨A

446µ_è y~bbs.3c3t.comð·ßom0v¨A

60µ_è y~bbs.3c3t.comð·ßom0v¨A

356µ_è y~bbs.3c3t.comð·ßom0v¨A

556µ_è y~bbs.3c3t.comð·ßom0v¨A

232µ_è y~bbs.3c3t.comð·ßom0v¨A

268µ_è y~bbs.3c3t.comð·ßom0v¨A

258µ_è y~bbs.3c3t.comð·ßom0v¨A

380µ_è y~bbs.3c3t.comð·ßom0v¨A

186µ_è y~bbs.3c3t.comð·ßom0v¨A

219µ_è y~bbs.3c3t.comð·ßom0v¨A

236µ_è y~bbs.3c3t.comð·ßom0v¨A

344µ_è y~bbs.3c3t.comð·ßom0v¨A

175µ_è y~bbs.3c3t.comð·ßom0v¨A

206µ_è y~bbs.3c3t.comð·ßom0v¨A

80二µ_è y~bbs.3c3t.comð·ßom0v¨A

680µ_è y~bbs.3c3t.comð·ßom0v¨A

1042µ_è y~bbs.3c3t.comð·ßom0v¨A

500µ_è y~bbs.3c3t.comð·ßom0v¨A

579µ_è y~bbs.3c3t.comð·ßom0v¨A

469µ_è y~bbs.3c3t.comð·ßom0v¨A

679µ_è y~bbs.3c3t.comð·ßom0v¨A

376µ_è y~bbs.3c3t.comð·ßom0v¨A

446µ_è y~bbs.3c3t.comð·ßom0v¨A

435µ_è y~bbs.3c3t.comð·ßom0v¨A

625µ_è y~bbs.3c3t.comð·ßom0v¨A

354µ_è y~bbs.3c3t.comð·ßom0v¨A

422µ_è y~bbs.3c3t.comð·ßom0v¨A

60二µ_è y~bbs.3c3t.comð·ßom0v¨A

380µ_è y~bbs.3c3t.comð·ßom0v¨A

602µ_è y~bbs.3c3t.comð·ßom0v¨A

265µ_è y~bbs.3c3t.comð·ßom0v¨A

301µ_è y~bbs.3c3t.comð·ßom0v¨A

247µ_è y~bbs.3c3t.comð·ßom0v¨A

361µ_è y~bbs.3c3t.comð·ßom0v¨A

193µ_è y~bbs.3c3t.comð·ßom0v¨A

226µ_è y~bbs.3c3t.comð·ßom0v¨A

227µ_è y~bbs.3c3t.comð·ßom0v¨A

328µ_è y~bbs.3c3t.comð·ßom0v¨A

180µ_è y~bbs.3c3t.comð·ßom0v¨A

213µ_è y~bbs.3c3t.comð·ßom0v¨A

40二µ_è y~bbs.3c3t.comð·ßom0v¨A

125µ_è y~bbs.3c3t.comð·ßom0v¨A

250µ_è y~bbs.3c3t.comð·ßom0v¨A

83µ_è y~bbs.3c3t.comð·ßom0v¨A

114µ_è y~bbs.3c3t.comð·ßom0v¨A

85µ_è y~bbs.3c3t.comð·ßom0v¨A

156µ_è y~bbs.3c3t.comð·ßom0v¨A

63µ_è y~bbs.3c3t.comð·ßom0v¨A

89µ_è y~bbs.3c3t.comð·ßom0v¨A

77µ_è y~bbs.3c3t.comð·ßom0v¨A

139µ_è y~bbs.3c3t.comð·ßom0v¨A

59µ_è y~bbs.3c3t.comð·ßom0v¨A

83µ_è y~bbs.3c3t.comð·ßom0v¨A

40三µ_è y~bbs.3c3t.comð·ßom0v¨A

125µ_è y~bbs.3c3t.comð·ßom0v¨A

250µ_è y~bbs.3c3t.comð·ßom0v¨A

83µ_è y~bbs.3c3t.comð·ßom0v¨A

114µ_è y~bbs.3c3t.comð·ßom0v¨A

85µ_è y~bbs.3c3t.comð·ßom0v¨A

156µ_è y~bbs.3c3t.comð·ßom0v¨A

63µ_è y~bbs.3c3t.comð·ßom0v¨A

89µ_è y~bbs.3c3t.comð·ßom0v¨A

77µ_è y~bbs.3c3t.comð·ßom0v¨A

139µ_è y~bbs.3c3t.comð·ßom0v¨A

59µ_è y~bbs.3c3t.comð·ßom0v¨A

83µ_è y~bbs.3c3t.comð·ßom0v¨A

30三µ_è y~bbs.3c3t.comð·ßom0v¨A

76µ_è y~bbs.3c3t.comð·ßom0v¨A

136µ_è y~bbs.3c3t.comð·ßom0v¨A

49µ_è y~bbs.3c3t.comð·ßom0v¨A

58µ_è y~bbs.3c3t.comð·ßom0v¨A

65µ_è y~bbs.3c3t.comð·ßom0v¨A

111µ_è y~bbs.3c3t.comð·ßom0v¨A

45µ_è y~bbs.3c3t.comð·ßom0v¨A

53µ_è y~bbs.3c3t.comð·ßom0v¨A

57µ_è y~bbs.3c3t.comð·ßom0v¨A

94µ_è y~bbs.3c3t.comð·ßom0v¨A

41µ_è y~bbs.3c3t.comð·ßom0v¨A

49µ_è y~bbs.3c3t.comð·ßom0v¨A

20四µ_è y~bbs.3c3t.comð·ßom0v¨A

31µ_è y~bbs.3c3t.comð·ßom0v¨A

40µ_è y~bbs.3c3t.comð·ßom0v¨A

21µ_è y~bbs.3c3t.comð·ßom0v¨A

18µ_è y~bbs.3c3t.comð·ßom0v¨A

27µ_è y~bbs.3c3t.comð·ßom0v¨A

33µ_è y~bbs.3c3t.comð·ßom0v¨A

19µ_è y~bbs.3c3t.comð·ßom0v¨A

17µ_è y~bbs.3c3t.comð·ßom0v¨A

24µ_è y~bbs.3c3t.comð·ßom0v¨A

29µ_è y~bbs.3c3t.comð·ßom0v¨A

17µ_è y~bbs.3c3t.comð·ßom0v¨A

15µ_è y~bbs.3c3t.comð·ßom0v¨A

表7

公路隧道视距平曲线半径建议值（单位：m）

设计速度µ_è y~bbs.3c3t.comð·ßom0v¨A

安全视距半径R1µ_è y~bbs.3c3t.comð·ßom0v¨A

一般视距半径R2µ_è y~bbs.3c3t.comð·ßom0v¨A

最小视距半径R3µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏曲线µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏曲线µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏曲线µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏曲线µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏曲线µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏曲线µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

4005µ_è y~bbs.3c3t.comð·ßom0v¨A

11600µ_è y~bbs.3c3t.comð·ßom0v¨A

1940µ_è y~bbs.3c3t.comð·ßom0v¨A

5610µ_è y~bbs.3c3t.comð·ßom0v¨A

2860µ_è y~bbs.3c3t.comð·ßom0v¨A

8285µ_è y~bbs.3c3t.comð·ßom0v¨A

1625µ_è y~bbs.3c3t.comð·ßom0v¨A

4705µ_è y~bbs.3c3t.comð·ßom0v¨A

2615µ_è y~bbs.3c3t.comð·ßom0v¨A

7565µ_è y~bbs.3c3t.comð·ßom0v¨A

1545µ_è y~bbs.3c3t.comð·ßom0v¨A

4460µ_è y~bbs.3c3t.comð·ßom0v¨A

100µ_è y~bbs.3c3t.comð·ßom0v¨A

2495µ_è y~bbs.3c3t.comð·ßom0v¨A

6975µ_è y~bbs.3c3t.comð·ßom0v¨A

1120µ_è y~bbs.3c3t.comð·ßom0v¨A

3125µ_è y~bbs.3c3t.comð·ßom0v¨A

1710µ_è y~bbs.3c3t.comð·ßom0v¨A

4770µ_è y~bbs.3c3t.comð·ßom0v¨A

930µ_è y~bbs.3c3t.comð·ßom0v¨A

2590µ_è y~bbs.3c3t.comð·ßom0v¨A

1545µ_è y~bbs.3c3t.comð·ßom0v¨A

4315µ_è y~bbs.3c3t.comð·ßom0v¨A

880µ_è y~bbs.3c3t.comð·ßom0v¨A

2450µ_è y~bbs.3c3t.comð·ßom0v¨A

80µ_è y~bbs.3c3t.comð·ßom0v¨A

1205µ_è y~bbs.3c3t.comð·ßom0v¨A

3145µ_è y~bbs.3c3t.comð·ßom0v¨A

585µ_è y~bbs.3c3t.comð·ßom0v¨A

1515µ_è y~bbs.3c3t.comð·ßom0v¨A

825µ_è y~bbs.3c3t.comð·ßom0v¨A

2150µ_è y~bbs.3c3t.comð·ßom0v¨A

475µ_è y~bbs.3c3t.comð·ßom0v¨A

1240µ_è y~bbs.3c3t.comð·ßom0v¨A

750µ_è y~bbs.3c3t.comð·ßom0v¨A

1945µ_è y~bbs.3c3t.comð·ßom0v¨A

450µ_è y~bbs.3c3t.comð·ßom0v¨A

1170µ_è y~bbs.3c3t.comð·ßom0v¨A

60µ_è y~bbs.3c3t.comð·ßom0v¨A

560µ_è y~bbs.3c3t.comð·ßom0v¨A

1110µ_è y~bbs.3c3t.comð·ßom0v¨A

270µ_è y~bbs.3c3t.comð·ßom0v¨A

535µ_è y~bbs.3c3t.comð·ßom0v¨A

385µ_è y~bbs.3c3t.comð·ßom0v¨A

760µ_è y~bbs.3c3t.comð·ßom0v¨A

225µ_è y~bbs.3c3t.comð·ßom0v¨A

440µ_è y~bbs.3c3t.comð·ßom0v¨A

350µ_è y~bbs.3c3t.comð·ßom0v¨A

690µ_è y~bbs.3c3t.comð·ßom0v¨A

210µ_è y~bbs.3c3t.comð·ßom0v¨A

415µ_è y~bbs.3c3t.comð·ßom0v¨A

80二µ_è y~bbs.3c3t.comð·ßom0v¨A

1045µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

585µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

685µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

450µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

630µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

425µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

60二µ_è y~bbs.3c3t.comð·ßom0v¨A

605µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

305µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

365µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

230µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

330µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

215µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

40二µ_è y~bbs.3c3t.comð·ßom0v¨A

255µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

160µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

95µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

145µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

85µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

40三µ_è y~bbs.3c3t.comð·ßom0v¨A

255µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

160µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

95µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

145µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

85µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

30三µ_è y~bbs.3c3t.comð·ßom0v¨A

140µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

60µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

115µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

55µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

100µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

55µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

20四µ_è y~bbs.3c3t.comð·ßom0v¨A

45µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

20µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

35µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

20µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

35µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

20µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

5、隧道断面加宽
隧道平曲线半径小于最小视距半径R3时，应采取措施加大隧道横净距。若线形改善困难时，应加大隧道断面尺寸或调整断面布设。若按《规范》设置了超高值不大于4%的平曲线，右转弯隧道横净距均满足视距要求，左转弯隧道应加大左侧横净距，加宽参考值见表8所示。表中0.55和1.65分别为80和100公里/小时的最大加宽值。

表8
曲线隧道横净距加宽参考表 （单位：米）

设计速度µ_è y~bbs.3c3t.comð·ßom0v¨A

0µ_è y~bbs.3c3t.comð·ßom0v¨A

0.25µ_è y~bbs.3c3t.comð·ßom0v¨A

0.5µ_è y~bbs.3c3t.comð·ßom0v¨A

0.75（0.55）µ_è y~bbs.3c3t.comð·ßom0v¨A

1.00µ_è y~bbs.3c3t.comð·ßom0v¨A

1.25µ_è y~bbs.3c3t.comð·ßom0v¨A

1.5µ_è y~bbs.3c3t.comð·ßom0v¨A

1.75（1.65）µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

2615µ_è y~bbs.3c3t.comð·ßom0v¨A

2400µ_è y~bbs.3c3t.comð·ßom0v¨A

2225µ_è y~bbs.3c3t.comð·ßom0v¨A

2070µ_è y~bbs.3c3t.comð·ßom0v¨A

1935µ_è y~bbs.3c3t.comð·ßom0v¨A

1820µ_è y~bbs.3c3t.comð·ßom0v¨A

1715µ_è y~bbs.3c3t.comð·ßom0v¨A

1620µ_è y~bbs.3c3t.comð·ßom0v¨A

100µ_è y~bbs.3c3t.comð·ßom0v¨A

1545µ_è y~bbs.3c3t.comð·ßom0v¨A

1410µ_è y~bbs.3c3t.comð·ßom0v¨A

1300µ_è y~bbs.3c3t.comð·ßom0v¨A

1200µ_è y~bbs.3c3t.comð·ßom0v¨A

1120µ_è y~bbs.3c3t.comð·ßom0v¨A

1045µ_è y~bbs.3c3t.comð·ßom0v¨A

980µ_è y~bbs.3c3t.comð·ßom0v¨A

950µ_è y~bbs.3c3t.comð·ßom0v¨A

80µ_è y~bbs.3c3t.comð·ßom0v¨A

750µ_è y~bbs.3c3t.comð·ßom0v¨A

680µ_è y~bbs.3c3t.comð·ßom0v¨A

625µ_è y~bbs.3c3t.comð·ßom0v¨A

620µ_è y~bbs.3c3t.comð·ßom0v¨A

--µ_è y~bbs.3c3t.comð·ßom0v¨A

60µ_è y~bbs.3c3t.comð·ßom0v¨A

350µ_è y~bbs.3c3t.comð·ßom0v¨A

--µ_è y~bbs.3c3t.comð·ßom0v¨A

6、纵坡路段视距平曲线半径
前面计算的平曲线视距半径，应为路线纵坡小于2%的视距平曲线半径。当行驶方向为上坡时，有助于车辆制动，当行驶方向为下坡时，加大了制动距离。《标准》修正了3％、4％、5％、6％的下坡路段货车停车视距，《指南》修正了2％、4％、6％的上、下坡货车停车视距。暂且只讨论高速公路和一级公路，且线性增加不同坡度修正值，不考虑路线上坡影响。下坡路段货车停车视距修正值见表9所示。依据《标准》和《指南》修正视距计算出的视距半径见表10和表11所示。
表 9

µ_è y~bbs.3c3t.comð·ßom0v¨A
纵坡路段货车停车视距修正值（单位：米）

设计速度µ_è y~bbs.3c3t.comð·ßom0v¨A

平坡路段µ_è y~bbs.3c3t.comð·ßom0v¨A

2％µ_è y~bbs.3c3t.comð·ßom0v¨A

3％µ_è y~bbs.3c3t.comð·ßom0v¨A

4％µ_è y~bbs.3c3t.comð·ßom0v¨A

5％µ_è y~bbs.3c3t.comð·ßom0v¨A

6％µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

标准µ_è y~bbs.3c3t.comð·ßom0v¨A

指南µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

245µ_è y~bbs.3c3t.comð·ßom0v¨A

417µ_è y~bbs.3c3t.comð·ßom0v¨A

12µ_è y~bbs.3c3t.comð·ßom0v¨A

66µ_è y~bbs.3c3t.comð·ßom0v¨A

20µ_è y~bbs.3c3t.comð·ßom0v¨A

85µ_è y~bbs.3c3t.comð·ßom0v¨A

28µ_è y~bbs.3c3t.comð·ßom0v¨A

101µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

100µ_è y~bbs.3c3t.comð·ßom0v¨A

180µ_è y~bbs.3c3t.comð·ßom0v¨A

301µ_è y~bbs.3c3t.comð·ßom0v¨A

5µ_è y~bbs.3c3t.comð·ßom0v¨A

46µ_è y~bbs.3c3t.comð·ßom0v¨A

10µ_è y~bbs.3c3t.comð·ßom0v¨A

59µ_è y~bbs.3c3t.comð·ßom0v¨A

15µ_è y~bbs.3c3t.comð·ßom0v¨A

71µ_è y~bbs.3c3t.comð·ßom0v¨A

20µ_è y~bbs.3c3t.comð·ßom0v¨A

112µ_è y~bbs.3c3t.comð·ßom0v¨A

µ_è y~bbs.3c3t.comð·ßom0v¨A

80µ_è y~bbs.3c3t.comð·ßom0v¨A

125µ_è y~bbs.3c3t.comð·ßom0v¨A

202µ_è y~bbs.3c3t.comð·ßom0v¨A

3µ_è y~bbs.3c3t.comð·ßom0v¨A

30µ_è y~bbs.3c3t.comð·ßom0v¨A

5µ_è y~bbs.3c3t.comð·ßom0v¨A

39µ_è y~bbs.3c3t.comð·ßom0v¨A

7µ_è y~bbs.3c3t.comð·ßom0v¨A

46µ_è y~bbs.3c3t.comð·ßom0v¨A

11µ_è y~bbs.3c3t.comð·ßom0v¨A

64µ_è y~bbs.3c3t.comð·ßom0v¨A

14µ_è y~bbs.3c3t.comð·ßom0v¨A

81µ_è y~bbs.3c3t.comð·ßom0v¨A

60µ_è y~bbs.3c3t.comð·ßom0v¨A

85µ_è y~bbs.3c3t.comð·ßom0v¨A

120µ_è y~bbs.3c3t.comð·ßom0v¨A

2µ_è y~bbs.3c3t.comð·ßom0v¨A

17µ_è y~bbs.3c3t.comð·ßom0v¨A

4µ_è y~bbs.3c3t.comð·ßom0v¨A

22µ_è y~bbs.3c3t.comð·ßom0v¨A

6µ_è y~bbs.3c3t.comð·ßom0v¨A

26µ_è y~bbs.3c3t.comð·ßom0v¨A

8µ_è y~bbs.3c3t.comð·ßom0v¨A

36µ_è y~bbs.3c3t.comð·ßom0v¨A

10µ_è y~bbs.3c3t.comð·ßom0v¨A

45µ_è y~bbs.3c3t.comð·ßom0v¨A

表10
《标准》纵坡修正后的视距半径表

设计速度（km/h）µ_è y~bbs.3c3t.comð·ßom0v¨A

2%µ_è y~bbs.3c3t.comð·ßom0v¨A

3%µ_è y~bbs.3c3t.comð·ßom0v¨A

4%µ_è y~bbs.3c3t.comð·ßom0v¨A

5%µ_è y~bbs.3c3t.comð·ßom0v¨A

6%µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏µ_è y~bbs.3c3t.comð·ßom0v¨A

R1µ_è y~bbs.3c3t.comð·ßom0v¨A

120 µ_è y~bbs.3c3t.comð·ßom0v¨A

4403 µ_è y~bbs.3c3t.comð·ßom0v¨A

2131 µ_è y~bbs.3c3t.comð·ßom0v¨A

4682 µ_è y~bbs.3c3t.comð·ßom0v¨A

2265 µ_è y~bbs.3c3t.comð·ßom0v¨A

4969 µ_è y~bbs.3c3t.comð·ßom0v¨A

2404 µ_è y~bbs.3c3t.comð·ßom0v¨A

100 µ_è y~bbs.3c3t.comð·ßom0v¨A

2633 µ_è y~bbs.3c3t.comð·ßom0v¨A

1180 µ_è y~bbs.3c3t.comð·ßom0v¨A

2777 µ_è y~bbs.3c3t.comð·ßom0v¨A

1245 µ_è y~bbs.3c3t.comð·ßom0v¨A

2925 µ_è y~bbs.3c3t.comð·ßom0v¨A

1311 µ_è y~bbs.3c3t.comð·ßom0v¨A

3077 µ_è y~bbs.3c3t.comð·ßom0v¨A

1379 µ_è y~bbs.3c3t.comð·ßom0v¨A

80 µ_è y~bbs.3c3t.comð·ßom0v¨A

1260 µ_è y~bbs.3c3t.comð·ßom0v¨A

607 µ_è y~bbs.3c3t.comð·ßom0v¨A

1300 µ_è y~bbs.3c3t.comð·ßom0v¨A

626 µ_è y~bbs.3c3t.comð·ßom0v¨A

1340 µ_è y~bbs.3c3t.comð·ßom0v¨A

645 µ_è y~bbs.3c3t.comð·ßom0v¨A

1423 µ_è y~bbs.3c3t.comð·ßom0v¨A

685 µ_è y~bbs.3c3t.comð·ßom0v¨A

1486 µ_è y~bbs.3c3t.comð·ßom0v¨A

716 µ_è y~bbs.3c3t.comð·ßom0v¨A

60 µ_è y~bbs.3c3t.comð·ßom0v¨A

582 µ_è y~bbs.3c3t.comð·ßom0v¨A

280 µ_è y~bbs.3c3t.comð·ßom0v¨A

609 µ_è y~bbs.3c3t.comð·ßom0v¨A

293 µ_è y~bbs.3c3t.comð·ßom0v¨A

637 µ_è y~bbs.3c3t.comð·ßom0v¨A

307 µ_è y~bbs.3c3t.comð·ßom0v¨A

665 µ_è y~bbs.3c3t.comð·ßom0v¨A

320 µ_è y~bbs.3c3t.comð·ßom0v¨A

694 µ_è y~bbs.3c3t.comð·ßom0v¨A

334 µ_è y~bbs.3c3t.comð·ßom0v¨A

R2µ_è y~bbs.3c3t.comð·ßom0v¨A

120 µ_è y~bbs.3c3t.comð·ßom0v¨A

3145 µ_è y~bbs.3c3t.comð·ßom0v¨A

1785 µ_è y~bbs.3c3t.comð·ßom0v¨A

3344 µ_è y~bbs.3c3t.comð·ßom0v¨A

1898 µ_è y~bbs.3c3t.comð·ßom0v¨A

3549 µ_è y~bbs.3c3t.comð·ßom0v¨A

2014 µ_è y~bbs.3c3t.comð·ßom0v¨A

100 µ_è y~bbs.3c3t.comð·ßom0v¨A

1801 µ_è y~bbs.3c3t.comð·ßom0v¨A

978 µ_è y~bbs.3c3t.comð·ßom0v¨A

1900 µ_è y~bbs.3c3t.comð·ßom0v¨A

1031 µ_è y~bbs.3c3t.comð·ßom0v¨A

2001 µ_è y~bbs.3c3t.comð·ßom0v¨A

1086 µ_è y~bbs.3c3t.comð·ßom0v¨A

2105 µ_è y~bbs.3c3t.comð·ßom0v¨A

1143 µ_è y~bbs.3c3t.comð·ßom0v¨A

80 µ_è y~bbs.3c3t.comð·ßom0v¨A

862 µ_è y~bbs.3c3t.comð·ßom0v¨A

496 µ_è y~bbs.3c3t.comð·ßom0v¨A

889 µ_è y~bbs.3c3t.comð·ßom0v¨A

512 µ_è y~bbs.3c3t.comð·ßom0v¨A

917 µ_è y~bbs.3c3t.comð·ßom0v¨A

528 µ_è y~bbs.3c3t.comð·ßom0v¨A

973 µ_è y~bbs.3c3t.comð·ßom0v¨A

560 µ_è y~bbs.3c3t.comð·ßom0v¨A

1017 µ_è y~bbs.3c3t.comð·ßom0v¨A

585 µ_è y~bbs.3c3t.comð·ßom0v¨A

60 µ_è y~bbs.3c3t.comð·ßom0v¨A

398 µ_è y~bbs.3c3t.comð·ßom0v¨A

229 µ_è y~bbs.3c3t.comð·ßom0v¨A

417 µ_è y~bbs.3c3t.comð·ßom0v¨A

240 µ_è y~bbs.3c3t.comð·ßom0v¨A

436 µ_è y~bbs.3c3t.comð·ßom0v¨A

251 µ_è y~bbs.3c3t.comð·ßom0v¨A

455 µ_è y~bbs.3c3t.comð·ßom0v¨A

262 µ_è y~bbs.3c3t.comð·ßom0v¨A

475 µ_è y~bbs.3c3t.comð·ßom0v¨A

273 µ_è y~bbs.3c3t.comð·ßom0v¨A

R3µ_è y~bbs.3c3t.comð·ßom0v¨A

120 µ_è y~bbs.3c3t.comð·ßom0v¨A

2872 µ_è y~bbs.3c3t.comð·ßom0v¨A

1694 µ_è y~bbs.3c3t.comð·ßom0v¨A

3053 µ_è y~bbs.3c3t.comð·ßom0v¨A

1801 µ_è y~bbs.3c3t.comð·ßom0v¨A

3240 µ_è y~bbs.3c3t.comð·ßom0v¨A

1911 µ_è y~bbs.3c3t.comð·ßom0v¨A

100 µ_è y~bbs.3c3t.comð·ßom0v¨A

1630 µ_è y~bbs.3c3t.comð·ßom0v¨A

925 µ_è y~bbs.3c3t.comð·ßom0v¨A

1719 µ_è y~bbs.3c3t.comð·ßom0v¨A

976 µ_è y~bbs.3c3t.comð·ßom0v¨A

1811 µ_è y~bbs.3c3t.comð·ßom0v¨A

1028 µ_è y~bbs.3c3t.comð·ßom0v¨A

1905 µ_è y~bbs.3c3t.comð·ßom0v¨A

1081 µ_è y~bbs.3c3t.comð·ßom0v¨A

80 µ_è y~bbs.3c3t.comð·ßom0v¨A

780 µ_è y~bbs.3c3t.comð·ßom0v¨A

468 µ_è y~bbs.3c3t.comð·ßom0v¨A

805 µ_è y~bbs.3c3t.comð·ßom0v¨A

483 µ_è y~bbs.3c3t.comð·ßom0v¨A

830 µ_è y~bbs.3c3t.comð·ßom0v¨A

498 µ_è y~bbs.3c3t.comð·ßom0v¨A

881 µ_è y~bbs.3c3t.comð·ßom0v¨A

528 µ_è y~bbs.3c3t.comð·ßom0v¨A

920 µ_è y~bbs.3c3t.comð·ßom0v¨A

552 µ_è y~bbs.3c3t.comð·ßom0v¨A

60 µ_è y~bbs.3c3t.comð·ßom0v¨A

360 µ_è y~bbs.3c3t.comð·ßom0v¨A

216 µ_è y~bbs.3c3t.comð·ßom0v¨A

377 µ_è y~bbs.3c3t.comð·ßom0v¨A

226 µ_è y~bbs.3c3t.comð·ßom0v¨A

394 µ_è y~bbs.3c3t.comð·ßom0v¨A

237 µ_è y~bbs.3c3t.comð·ßom0v¨A

412 µ_è y~bbs.3c3t.comð·ßom0v¨A

247 µ_è y~bbs.3c3t.comð·ßom0v¨A

430 µ_è y~bbs.3c3t.comð·ßom0v¨A

258 µ_è y~bbs.3c3t.comð·ßom0v¨A

表11
《指南》纵坡修正后的视距半径表

设计速度（km/h）µ_è y~bbs.3c3t.comð·ßom0v¨A

2%µ_è y~bbs.3c3t.comð·ßom0v¨A

3%µ_è y~bbs.3c3t.comð·ßom0v¨A

4%µ_è y~bbs.3c3t.comð·ßom0v¨A

5%µ_è y~bbs.3c3t.comð·ßom0v¨A

6%µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏µ_è y~bbs.3c3t.comð·ßom0v¨A

左偏µ_è y~bbs.3c3t.comð·ßom0v¨A

右偏µ_è y~bbs.3c3t.comð·ßom0v¨A

R1µ_è y~bbs.3c3t.comð·ßom0v¨A

120 µ_è y~bbs.3c3t.comð·ßom0v¨A

15553 µ_è y~bbs.3c3t.comð·ßom0v¨A

7525 µ_è y~bbs.3c3t.comð·ßom0v¨A

16800µ_è y~bbs.3c3t.comð·ßom0v¨A

8129 µ_è y~bbs.3c3t.comð·ßom0v¨A

17888µ_è y~bbs.3c3t.comð·ßom0v¨A

8656 µ_è y~bbs.3c3t.comð·ßom0v¨A

　µ_è y~bbs.3c3t.comð·ßom0v¨A

100 µ_è y~bbs.3c3t.comð·ßom0v¨A

9262 µ_è y~bbs.3c3t.comð·ßom0v¨A

4152 µ_è y~bbs.3c3t.comð·ßom0v¨A

9969 µ_è y~bbs.3c3t.comð·ßom0v¨A

4469 µ_è y~bbs.3c3t.comð·ßom0v¨A

10645 µ_è y~bbs.3c3t.comð·ßom0v¨A

4772 µ_è y~bbs.3c3t.comð·ßom0v¨A

13121µ_è y~bbs.3c3t.comð·ßom0v¨A

5882 µ_è y~bbs.3c3t.comð·ßom0v¨A

　µ_è y~bbs.3c3t.comð·ßom0v¨A

80 µ_è y~bbs.3c3t.comð·ßom0v¨A

4140 µ_è y~bbs.3c3t.comð·ßom0v¨A

1993 µ_è y~bbs.3c3t.comð·ßom0v¨A

4468µ_è y~bbs.3c3t.comð·ßom0v¨A

2151 µ_è y~bbs.3c3t.comð·ßom0v¨A

4731µ_è y~bbs.3c3t.comð·ßom0v¨A

2278 µ_è y~bbs.3c3t.comð·ßom0v¨A

5443µ_è y~bbs.3c3t.comð·ßom0v¨A

2621 µ_è y~bbs.3c3t.comð·ßom0v¨A

6161 µ_è y~bbs.3c3t.comð·ßom0v¨A

2966 µ_è y~bbs.3c3t.comð·ßom0v¨A

60 µ_è y~bbs.3c3t.comð·ßom0v¨A

1444 µ_è y~bbs.3c3t.comð·ßom0v¨A

695 µ_è y~bbs.3c3t.comð·ßom0v¨A

1551µ_è y~bbs.3c3t.comð·ßom0v¨A

747 µ_è y~bbs.3c3t.comð·ßom0v¨A

1640 µ_è y~bbs.3c3t.comð·ßom0v¨A

789 µ_è y~bbs.3c3t.comð·ßom0v¨A

1872µ_è y~bbs.3c3t.comð·ßom0v¨A

901 µ_è y~bbs.3c3t.comð·ßom0v¨A

2094 µ_è y~bbs.3c3t.comð·ßom0v¨A

1008 µ_è y~bbs.3c3t.comð·ßom0v¨A

R2µ_è y~bbs.3c3t.comð·ßom0v¨A

120 µ_è y~bbs.3c3t.comð·ßom0v¨A

11109 µ_è y~bbs.3c3t.comð·ßom0v¨A

6305 µ_è y~bbs.3c3t.comð·ßom0v¨A

12000µ_è y~bbs.3c3t.comð·ßom0v¨A

6811 µ_è y~bbs.3c3t.comð·ßom0v¨A

12777µ_è y~bbs.3c3t.comð·ßom0v¨A

7252 µ_è y~bbs.3c3t.comð·ßom0v¨A

　µ_è y~bbs.3c3t.comð·ßom0v¨A

100 µ_è y~bbs.3c3t.comð·ßom0v¨A

6337 µ_è y~bbs.3c3t.comð·ßom0v¨A

3440 µ_è y~bbs.3c3t.comð·ßom0v¨A

6821µ_è y~bbs.3c3t.comð·ßom0v¨A

3703 µ_è y~bbs.3c3t.comð·ßom0v¨A

7283 µ_è y~bbs.3c3t.comð·ßom0v¨A

3954 µ_è y~bbs.3c3t.comð·ßom0v¨A

8977 µ_è y~bbs.3c3t.comð·ßom0v¨A

4873 µ_è y~bbs.3c3t.comð·ßom0v¨A

　µ_è y~bbs.3c3t.comð·ßom0v¨A

80 µ_è y~bbs.3c3t.comð·ßom0v¨A

2833 µ_è y~bbs.3c3t.comð·ßom0v¨A

1631 µ_è y~bbs.3c3t.comð·ßom0v¨A

3057µ_è y~bbs.3c3t.comð·ßom0v¨A

1760 µ_è y~bbs.3c3t.comð·ßom0v¨A

3237 µ_è y~bbs.3c3t.comð·ßom0v¨A

1864 µ_è y~bbs.3c3t.comð·ßom0v¨A

3724 µ_è y~bbs.3c3t.comð·ßom0v¨A

2144 µ_è y~bbs.3c3t.comð·ßom0v¨A

4215 µ_è y~bbs.3c3t.comð·ßom0v¨A

2427 µ_è y~bbs.3c3t.comð·ßom0v¨A

60 µ_è y~bbs.3c3t.comð·ßom0v¨A

988 µ_è y~bbs.3c3t.comð·ßom0v¨A

569 µ_è y~bbs.3c3t.comð·ßom0v¨A

1061µ_è y~bbs.3c3t.comð·ßom0v¨A

611 µ_è y~bbs.3c3t.comð·ßom0v¨A

1122 µ_è y~bbs.3c3t.comð·ßom0v¨A

646 µ_è y~bbs.3c3t.comð·ßom0v¨A

1281 µ_è y~bbs.3c3t.comð·ßom0v¨A

737 µ_è y~bbs.3c3t.comð·ßom0v¨A

1433 µ_è y~bbs.3c3t.comð·ßom0v¨A

825 µ_è y~bbs.3c3t.comð·ßom0v¨A

R3µ_è y~bbs.3c3t.comð·ßom0v¨A

120 µ_è y~bbs.3c3t.comð·ßom0v¨A

10143 µ_è y~bbs.3c3t.comð·ßom0v¨A

5982 µ_è y~bbs.3c3t.comð·ßom0v¨A

10957 µ_è y~bbs.3c3t.comð·ßom0v¨A

6462 µ_è y~bbs.3c3t.comð·ßom0v¨A

11666 µ_è y~bbs.3c3t.comð·ßom0v¨A

6880 µ_è y~bbs.3c3t.comð·ßom0v¨A

　µ_è y~bbs.3c3t.comð·ßom0v¨A

100 µ_è y~bbs.3c3t.comð·ßom0v¨A

5734 µ_è y~bbs.3c3t.comð·ßom0v¨A

3254 µ_è y~bbs.3c3t.comð·ßom0v¨A

6171 µ_è y~bbs.3c3t.comð·ßom0v¨A

3503 µ_è y~bbs.3c3t.comð·ßom0v¨A

6590 µ_è y~bbs.3c3t.comð·ßom0v¨A

3740 µ_è y~bbs.3c3t.comð·ßom0v¨A

8122µ_è y~bbs.3c3t.comð·ßom0v¨A

4610 µ_è y~bbs.3c3t.comð·ßom0v¨A

　µ_è y~bbs.3c3t.comð·ßom0v¨A

80 µ_è y~bbs.3c3t.comð·ßom0v¨A

2563 µ_è y~bbs.3c3t.comð·ßom0v¨A

1538 µ_è y~bbs.3c3t.comð·ßom0v¨A

2766 µ_è y~bbs.3c3t.comð·ßom0v¨A

1659 µ_è y~bbs.3c3t.comð·ßom0v¨A

2929 µ_è y~bbs.3c3t.comð·ßom0v¨A

1757 µ_è y~bbs.3c3t.comð·ßom0v¨A

3369µ_è y~bbs.3c3t.comð·ßom0v¨A

2022 µ_è y~bbs.3c3t.comð·ßom0v¨A

3814 µ_è y~bbs.3c3t.comð·ßom0v¨A

2288 µ_è y~bbs.3c3t.comð·ßom0v¨A

60 µ_è y~bbs.3c3t.comð·ßom0v¨A

894 µ_è y~bbs.3c3t.comð·ßom0v¨A

536 µ_è y~bbs.3c3t.comð·ßom0v¨A

960 µ_è y~bbs.3c3t.comð·ßom0v¨A

576 µ_è y~bbs.3c3t.comð·ßom0v¨A

1015 µ_è y~bbs.3c3t.comð·ßom0v¨A

609 µ_è y~bbs.3c3t.comð·ßom0v¨A

1159µ_è y~bbs.3c3t.comð·ßom0v¨A

695 µ_è y~bbs.3c3t.comð·ßom0v¨A

1296 µ_è y~bbs.3c3t.comð·ßom0v¨A

778 µ_è y~bbs.3c3t.comð·ßom0v¨A

7、竖曲线视距半径
视距为竖曲线上的一段圆弧，视点（眼睛）与障碍物顶部的直线距离，可简称为视线距离，因竖曲线半径一般很大，往往是平曲线的很多倍，可以认为视距与视线距离相等。凸型竖曲线可能成为视线障碍，凹型竖曲线可能成为车灯的障碍，设置照明的隧道可不考虑凹型竖曲线的影响。
设眼睛视点高度为a，障碍物高度为b，经求证竖曲线的视距半径计算公式为6-1。《规范》货车竖曲线视距半径小于小客车半径，小客车视距半径多数大于路线极限最小竖曲线半径，小于路线一般最小半径；但《指南》小客车视距半径小于货车视距半径，货车视距半径大于路线一般最小半径。

R竖=(S / (a0.5+b0.5))2/ 2----------------6-1
为了便于运用，对于标准车型小客车、货车可分别简化为6-2和6-3近视计算公式：

R小=S2 / 4---------------6-2

R货=S2 / 6---------------6-3
8、结语
综上所述，隧道横净距越小，要求最小平曲线半径越大；单向双车道隧道，左车道横净距小于右车道横净距；依据车辆行驶方向，左转弯隧道的横净距小于右转弯隧道；无论左转或是右转，视距曲线半径均由货车控制。现行规范规定隧道左侧路缘带宽度小于右侧路缘带宽度，适应了驾驶行为，但不利于保证曲线隧道路段的视距要求，应给与关注。隧道曲线半径应尽可能大于R2。当隧道曲线半径大于安全视距半径R1时，可不考虑其它因素对视距的影响；当曲线半径小于安全视距半径R1时，应检查纵坡对视距的影响，并控制检修道高度；当小于R2时，应同时检查隧道内部设施对视距的影响；当小于R3时，应优先考虑加大平曲线半径，或加宽隧道左侧横净距。《指南》加大了视距要求，依据隧道路段驾驶习惯，山区高速公路的中、短隧道可不考虑《指南》提高要求，特长、长隧道曲线半径，宜采用《指南》对应的视距曲线半径。
限于水平，平面线形、平纵组合等因素未讨论，且文中难免有不妥之处，敬请批评指正。
参考文献
[1]中华人民共和国交通部.公路工程技术标准（JTGB01—2003）.北京.人民交通出版社.2004.
[2]中华人民共和国交通部.公路隧道设计规范（JTGD70—2004）.北京.人民交通出版社.2004.
[3]中华人民共和国交通部.公路项目安全性评价指南（JTG/TB05—2004）.北京.人民交通出版社.2005.
[4]中华人民共和国交通部.公路路线设计规范（JTG D20—2006）.北京.人民交通出版社.2007.
[5]中华人民共和国交通部.公路路线设计规范（JTJ 011—94）.北京.人民交通出版社.1995.
作者简介：
1、
韩熠：工作单位：陕西交通技术咨询有限公司，同济大学道路工程专业，本科，高级工程师，总经理。联系方式：西安市含光北路110号，陕西交通技术咨询有限公司，电话：(029)88423020。
2、
王跟民：陕西省林业勘察设计院公路分院，工程师。

TOP

上一主题| 下一主题

关闭安全选项

[文章] 公路隧道视距曲线半径的探讨 [复制链接]