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发表于 2009-06-27 09:29 |只看楼主

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
韩熠1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
王跟民2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

（ 1.陕西交通技术咨询有限公司，陕西西安 710068；®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.陕西省林业勘察设计院，陕西西安 710082；）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

［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1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
高速、一级公路隧道建筑限界横断面组成一览表（单位：米）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

序号®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

设计速度（km/h）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

车道宽度W®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

侧向宽度L®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

最小检修道J®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

建筑限界净空®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左侧LL®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右侧LR®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左侧®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右侧®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

净宽®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

净高®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.75×2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.25 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

11.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.75×2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

10.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.75×2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

10.25 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.75×2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

9.75 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

表2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
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）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

序号®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

设计速度（km/h）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

车道宽度W®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

侧向宽度L®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

最小人行道J®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

建筑限界净空®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左侧LL®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右侧LR®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左侧®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右侧®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

净宽®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

净高®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80二级®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.75×2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

10.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60二级®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.50×2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

9.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

40二级®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.50×2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.25 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

9.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

40三级®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.50×2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.25 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

9.00 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

30三级®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.25×2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.25 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

7.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

6®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20四级®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.00×2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.25 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

7.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.50 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

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3®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
高速、一级公路停车视距及货车停车视距（单位：米）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

序号®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

设计速度®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准停车视距®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南停车视距®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

停车视距®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

停车视距®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

《标准》修正停车货车视距®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

6%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

7％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

8％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

9％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

210®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

280®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

245®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

417®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

265®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

273®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

--®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

160®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

205®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

180®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

301®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

190®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

195®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

200®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

--®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

110®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

140®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

125®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

202®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

130®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

132®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

136®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

139®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

75®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

90®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

85®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

89®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

91®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

93®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

95®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

表4

二、三、四级公路停车视距及货车停车视距（单位：米）

序号®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

设计速度®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准停车视距®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南停车视距®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

停车视距®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

停车视距®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

《标准》下坡修正停车货车视距®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

6%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

7％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

8％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

9％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

110®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

140®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

125®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

202®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

130®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

132®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

136®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

139®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

75®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

90®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

85®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

89®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

91®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

93®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

95®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

40®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

--®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

50®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

--®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

50®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

30®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

--®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

35®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

--®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

35®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

--®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

--®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

《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®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

m1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

m2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

m3®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.225 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.875 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.525 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.875 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.975 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.275 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.225 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.875 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.525 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.875 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.975 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.275 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.725 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.025 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.975 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.275 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.975 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.025 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.725 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.775 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.125 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.975 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.025 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.975 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.025 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.725 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.775 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.125 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.975 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.025 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80二®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.225 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.875 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.025 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.225 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.875 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.025 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.475 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.125 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.275 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60二®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.850 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.500 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.650 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.000 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.850 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.500 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.650 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.000 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.100 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.750 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.900 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4.250 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

40二®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.600 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.250 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.400 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.750 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.350 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.000 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.150 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.500 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.600 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.250 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.400 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.750 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

40三®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.600 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.250 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.400 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.750 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.350 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.000 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.150 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.500 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.600 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.250 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.400 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.750 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

30三®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.475 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.125 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.275 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.725 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.375 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.525 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.875 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.975 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.625 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.775 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.125 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20四®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.600 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.250 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.400 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.750 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.850 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.500 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.650 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.000 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.100 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.750 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2.900 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3.250 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

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。

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表6®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
公路隧道视距平曲线半径计算值（单位：米）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

设计速度®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

安全视距半径R1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

一般视距半径R2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

最小视距半径R3®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右侧车道®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

小车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

货车®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2478®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4002®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1564®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1936®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1853®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2858®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1289®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1622®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1709®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2610®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1218®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1539®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1620®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2492®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

977®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1117®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1174®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1705®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

795®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

926®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1076®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1543®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

749®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

876®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

766®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1202®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

500®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

579®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

555®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

822®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

401®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

473®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

508®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

744®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

376®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

446®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

356®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

556®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

232®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

268®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

258®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

380®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

186®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

219®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

236®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

344®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

175®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

206®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80二®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

680®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1042®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

500®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

579®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

469®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

679®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

376®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

446®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

435®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

625®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

354®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

422®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60二®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

380®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

602®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

265®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

301®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

247®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

361®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

193®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

226®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

227®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

328®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

180®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

213®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

40二®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

125®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

250®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

83®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

114®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

85®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

156®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

63®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

89®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

77®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

139®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

59®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

83®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

40三®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

125®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

250®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

83®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

114®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

85®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

156®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

63®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

89®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

77®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

139®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

59®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

83®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

30三®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

76®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

136®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

49®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

58®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

65®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

111®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

45®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

53®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

57®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

94®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

41®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

49®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20四®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

31®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

40®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

21®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

18®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

27®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

33®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

19®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

17®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

24®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

29®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

17®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

15®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

表7

公路隧道视距平曲线半径建议值（单位：m）

设计速度®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

安全视距半径R1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

一般视距半径R2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

最小视距半径R3®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏曲线®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏曲线®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏曲线®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏曲线®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏曲线®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏曲线®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4005®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

11600®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1940®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5610®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2860®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

8285®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1625®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4705®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2615®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

7565®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1545®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4460®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2495®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

6975®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3125®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1710®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4770®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

930®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2590®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1545®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4315®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

880®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2450®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1205®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3145®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

585®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1515®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

825®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2150®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

475®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1240®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

750®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1945®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

450®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1170®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

560®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1110®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

270®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

535®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

385®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

760®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

225®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

440®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

350®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

690®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

210®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

415®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80二®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1045®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

585®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

685®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

450®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

630®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

425®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60二®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

605®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

305®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

365®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

230®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

330®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

215®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

40二®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

255®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

160®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

95®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

145®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

85®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

40三®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

255®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

160®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

95®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

145®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

85®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

30三®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

140®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

115®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

55®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

55®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20四®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

45®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

35®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

35®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

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®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.25®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.5®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

0.75（0.55）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.00®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.25®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.5®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1.75（1.65）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2615®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2400®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2225®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2070®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1935®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1820®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1715®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1620®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1545®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1410®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1300®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1200®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1045®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

980®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

950®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

750®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

680®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

625®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

620®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

--®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

350®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

--®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

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

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS
纵坡路段货车停车视距修正值（单位：米）

设计速度®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

平坡路段®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

6％®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

标准®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

指南®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

245®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

417®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

12®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

66®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

85®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

28®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

101®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

180®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

301®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

46®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

10®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

59®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

15®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

71®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

20®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

112®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

125®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

202®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

30®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

39®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

7®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

46®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

11®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

64®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

14®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

81®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

85®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

17®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

22®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

6®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

26®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

8®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

36®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

10®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

45®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

表10
《标准》纵坡修正后的视距半径表

设计速度（km/h）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

6%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

R1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4403 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2131 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4682 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2265 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4969 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2404 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2633 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1180 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2777 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1245 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2925 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1311 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3077 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1379 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1260 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

607 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1300 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

626 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1340 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

645 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1423 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

685 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1486 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

716 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

582 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

280 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

609 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

293 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

637 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

307 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

665 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

320 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

694 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

334 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

R2®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3145 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1785 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3344 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1898 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3549 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2014 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1801 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

978 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1900 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1031 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2001 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1086 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2105 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1143 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

862 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

496 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

889 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

512 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

917 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

528 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

973 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

560 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1017 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

585 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

398 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

229 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

417 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

240 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

436 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

251 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

455 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

262 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

475 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

273 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

R3®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2872 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1694 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3053 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1801 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3240 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1911 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1630 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

925 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1719 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

976 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1811 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1028 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1905 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1081 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

780 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

468 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

805 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

483 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

830 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

498 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

881 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

528 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

920 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

552 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

60 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

360 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

216 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

377 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

226 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

394 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

237 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

412 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

247 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

430 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

258 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

表11
《指南》纵坡修正后的视距半径表

设计速度（km/h）®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

3%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

6%®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

左偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

右偏®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

R1®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

120 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

15553 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

7525 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

16800®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

8129 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

17888®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

8656 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

　®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

100 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

9262 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4152 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

9969 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4469 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

10645 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4772 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

13121®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5882 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

　®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

80 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4140 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

1993 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4468®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2151 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

4731®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2278 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

5443®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2621 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

6161 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

2966 ®è¡z;¨¼_¡bbs.3c3t.comC_ào®ÂS

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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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