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发表于 2009-06-27 09:29 |只看楼主

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
韩熠1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
王跟民2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

（ 1.陕西交通技术咨询有限公司，陕西西安 710068；â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.陕西省林业勘察设计院，陕西西安 710082；）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

［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1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
高速、一级公路隧道建筑限界横断面组成一览表（单位：米）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

序号â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

设计速度（km/h）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

车道宽度Wâ.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

侧向宽度Lâ.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

最小检修道Jâ.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

建筑限界净空â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左侧LLâ.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右侧LRâ.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左侧â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右侧â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

净宽â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

净高â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.75×2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.75 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.25 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.75 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

11.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.75×2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.75 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

10.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.75×2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.75 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

10.25 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.75×2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.75 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

9.75 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

表2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
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）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

序号â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

设计速度（km/h）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

车道宽度Wâ.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

侧向宽度Lâ.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

最小人行道Jâ.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

建筑限界净空â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左侧LLâ.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右侧LRâ.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左侧â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右侧â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

净宽â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

净高â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80二级â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.75×2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.75 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

10.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60二级â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.50×2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.75 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

9.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

40二级â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.50×2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.25 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.75 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

9.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

40三级â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.50×2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.25 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.75 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

9.00 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

30三级â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.25×2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.25 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

7.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20四级â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.00×2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.25 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

7.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.50 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

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3â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
高速、一级公路停车视距及货车停车视距（单位：米）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

序号â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

设计速度â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准停车视距â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南停车视距â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

停车视距â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

停车视距â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

《标准》修正停车货车视距â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

7％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

8％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

9％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

210â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

280â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

245â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

417â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

265â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

273â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

--â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

160â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

205â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

180â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

301â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

190â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

195â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

200â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

--â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

110â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

140â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

125â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

202â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

130â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

132â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

136â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

139â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

75â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

90â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

85â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

89â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

91â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

93â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

95â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

表4

二、三、四级公路停车视距及货车停车视距（单位：米）

序号â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

设计速度â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准停车视距â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南停车视距â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

停车视距â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

停车视距â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

《标准》下坡修正停车货车视距â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

7％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

8％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

9％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

110â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

140â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

125â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

202â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

130â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

132â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

136â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

139â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

75â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

90â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

85â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

89â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

91â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

93â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

95â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

40â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

--â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

50â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

--â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

50â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

30â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

--â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

35â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

--â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

35â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

--â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

--â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

《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â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

m1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

m2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

m3â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.225 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.875 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.525 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.875 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.975 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.275 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.225 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.875 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.525 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.875 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.975 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.275 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.725 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.025 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.975 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.275 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.975 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.025 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.725 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.775 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.125 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.975 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.025 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.975 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.025 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.725 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.775 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.125 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.975 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.025 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80二â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.225 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.875 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.025 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.225 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.875 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.025 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.475 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.125 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.275 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60二â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.850 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.500 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.650 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.000 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.850 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.500 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.650 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.000 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.100 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.750 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.900 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4.250 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

40二â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.600 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.250 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.400 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.750 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.350 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.000 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.150 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.500 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.600 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.250 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.400 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.750 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

40三â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.600 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.250 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.400 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.750 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.350 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.000 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.150 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.500 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.600 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.250 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.400 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.750 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

30三â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.475 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.125 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.275 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.725 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.375 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.525 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.875 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.975 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.625 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.775 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.125 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20四â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.600 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.250 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.400 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.750 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.850 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.500 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.650 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.000 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.100 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.750 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2.900 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3.250 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

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。

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

表6â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
公路隧道视距平曲线半径计算值（单位：米）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

设计速度â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

安全视距半径R1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

一般视距半径R2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

最小视距半径R3â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右侧车道â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

小车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

货车â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2478â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4002â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1564â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1936â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1853â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2858â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1289â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1622â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1709â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2610â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1218â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1539â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1620â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2492â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

977â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1117â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1174â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1705â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

795â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

926â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1076â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1543â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

749â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

876â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

766â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1202â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

500â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

579â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

555â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

822â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

401â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

473â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

508â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

744â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

376â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

446â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

356â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

556â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

232â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

268â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

258â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

380â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

186â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

219â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

236â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

344â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

175â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

206â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80二â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

680â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1042â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

500â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

579â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

469â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

679â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

376â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

446â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

435â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

625â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

354â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

422â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60二â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

380â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

602â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

265â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

301â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

247â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

361â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

193â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

226â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

227â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

328â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

180â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

213â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

40二â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

125â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

250â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

83â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

114â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

85â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

156â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

63â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

89â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

77â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

139â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

59â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

83â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

40三â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

125â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

250â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

83â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

114â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

85â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

156â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

63â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

89â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

77â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

139â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

59â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

83â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

30三â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

76â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

136â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

49â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

58â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

65â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

111â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

45â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

53â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

57â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

94â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

41â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

49â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20四â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

31â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

40â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

21â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

18â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

27â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

33â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

19â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

17â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

24â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

29â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

17â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

15â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

表7

公路隧道视距平曲线半径建议值（单位：m）

设计速度â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

安全视距半径R1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

一般视距半径R2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

最小视距半径R3â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏曲线â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏曲线â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏曲线â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏曲线â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏曲线â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏曲线â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4005â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

11600â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1940â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5610â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2860â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

8285â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1625â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4705â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2615â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

7565â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1545â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4460â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2495â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6975â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3125â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1710â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4770â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

930â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2590â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1545â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4315â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

880â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2450â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1205â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3145â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

585â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1515â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

825â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2150â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

475â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1240â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

750â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1945â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

450â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1170â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

560â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1110â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

270â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

535â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

385â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

760â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

225â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

440â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

350â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

690â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

210â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

415â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80二â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1045â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

585â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

685â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

450â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

630â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

425â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60二â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

605â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

305â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

365â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

230â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

330â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

215â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

40二â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

255â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

160â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

95â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

145â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

85â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

40三â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

255â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

160â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

95â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

145â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

85â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

30三â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

140â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

115â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

55â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

55â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20四â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

45â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

35â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

35â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

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â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.25â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.5â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

0.75（0.55）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.00â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.25â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.5â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1.75（1.65）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2615â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2400â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2225â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2070â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1935â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1820â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1715â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1620â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1545â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1410â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1300â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1200â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1045â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

980â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

950â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

750â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

680â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

625â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

620â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

--â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

350â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

--â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

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

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬
纵坡路段货车停车视距修正值（单位：米）

设计速度â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

平坡路段â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6％â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

标准â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

指南â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

245â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

417â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

12â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

66â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

85â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

28â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

101â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

180â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

301â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

46â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

10â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

59â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

15â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

71â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

20â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

112â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

125â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

202â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

30â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

39â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

7â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

46â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

11â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

64â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

14â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

81â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

85â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

17â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

22â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

26â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

8â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

36â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

10â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

45â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

表10
《标准》纵坡修正后的视距半径表

设计速度（km/h）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

R1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4403 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2131 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4682 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2265 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4969 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2404 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2633 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1180 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2777 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1245 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2925 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1311 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3077 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1379 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1260 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

607 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1300 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

626 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1340 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

645 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1423 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

685 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1486 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

716 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

582 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

280 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

609 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

293 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

637 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

307 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

665 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

320 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

694 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

334 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

R2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3145 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1785 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3344 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1898 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3549 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2014 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1801 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

978 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1900 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1031 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2001 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1086 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2105 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1143 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

862 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

496 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

889 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

512 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

917 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

528 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

973 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

560 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1017 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

585 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

398 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

229 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

417 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

240 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

436 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

251 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

455 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

262 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

475 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

273 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

R3â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2872 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1694 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3053 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1801 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3240 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1911 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1630 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

925 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1719 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

976 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1811 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1028 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1905 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1081 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

780 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

468 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

805 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

483 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

830 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

498 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

881 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

528 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

920 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

552 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

360 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

216 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

377 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

226 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

394 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

237 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

412 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

247 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

430 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

258 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

表11
《指南》纵坡修正后的视距半径表

设计速度（km/h）â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6%â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

左偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

右偏â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

R1â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

15553 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

7525 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

16800â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

8129 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

17888â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

8656 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

　â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

9262 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4152 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

9969 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4469 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

10645 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4772 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

13121â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5882 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

　â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4140 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1993 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4468â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2151 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4731â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2278 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

5443â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2621 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6161 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2966 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1444 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

695 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1551â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

747 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1640 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

789 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1872â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

901 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2094 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1008 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

R2â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

120 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

11109 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6305 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

12000â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6811 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

12777â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

7252 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

　â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

100 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6337 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3440 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

6821â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3703 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

7283 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3954 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

8977 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4873 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

　â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

80 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2833 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1631 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3057â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1760 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3237 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

1864 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

3724 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2144 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

4215 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

2427 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

60 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

988 â.JÎé7jìbbs.3c3t.comõÎ\Dí#¬

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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。

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