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首页 » 监理论坛|监理工程师论坛 » 公路水运监理论坛 » 公路隧道视距曲线半径的探讨
监理 - 2009/6/27 9:29:00

  ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
韩熠1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
王跟民2
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( 1.陕西交通技术咨询有限公司,陕西 西安 710068;,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.陕西省林业勘察设计院,陕西西安 710082;),FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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[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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
[关键词]隧道  横净距  视距半径  加宽,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
1、视距影响因素及隧道建筑限界,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

表1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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高速、一级公路隧道建筑限界横断面组成一览表(单位:米),FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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序号,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

设计速度(km/h),FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

车道宽度W,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

侧向宽度L,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

最小检修道J,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

建筑限界净空,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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左侧LL,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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右侧LR,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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左侧,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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右侧,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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净宽,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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净高,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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120,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.75×2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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11.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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100,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.75×2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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10.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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80,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.75×2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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10.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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60,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.75×2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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9.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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表2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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),FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

 

序号,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

设计速度(km/h),FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

车道宽度W,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

侧向宽度L,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

最小人行道J,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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建筑限界净空,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

 

左侧LL,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

右侧LR,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

左侧,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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右侧,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

净宽,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

净高,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

 
 

1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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80二级,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.75×2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

10.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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60二级,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.50×2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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9.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

40二级,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.50×2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

9.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

40三级,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.50×2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.75 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

9.00 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

 

5,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

30三级,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.25×2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

7.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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6,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

20四级,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.00×2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

0.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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0.25 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

7.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4.50 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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二级公路设计速度为8060公里/小时,隧道内人行道(兼检修道)最小宽度为1.0,净宽分别为1110,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,小于《标准》规定最小值,本文采用《标准》7.5的建筑限界。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
2、标准车型与视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
计算车型分别选择小客车和货车,小客车宽度B1.8,货车宽度B2.5,驾驶员位于车辆左侧0.5处。前方障碍物高均为0.1。停车视距以小客车为标准,目高为1.2,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。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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

表3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
高速、一级公路停车视距及货车停车视距(单位:米),FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

序号,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

设计速度,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

标准停车视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

指南停车视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

标准货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

停车视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

指南货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

停车视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

《标准》修正停车货车视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5%,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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6%,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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7,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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8,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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9,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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120,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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210,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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280,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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245,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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417,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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265,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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273,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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100,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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160,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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205,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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180,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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301,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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190,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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195,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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200,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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80,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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110,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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140,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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125,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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202,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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130,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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132,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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136,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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139,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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60,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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75,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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90,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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85,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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120,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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89,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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91,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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93,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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95,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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表4,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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二、三、四级公路停车视距及货车停车视距(单位:米)
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序号,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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设计速度,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

标准停车视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

指南停车视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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标准货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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停车视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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指南货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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停车视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

《标准》下坡修正停车货车视距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5%,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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6%,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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7,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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8,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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9,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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80,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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110,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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140,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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125,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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202,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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130,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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132,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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136,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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139,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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60,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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75,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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90,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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85,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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120,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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89,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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91,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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93,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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95,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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40,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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40,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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50,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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50,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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50,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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50,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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50,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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50,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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30,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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30,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

35,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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35,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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35,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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35,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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35,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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35,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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35,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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《指南》修正了货车停车视距,纵坡大于2%,半径小于400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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
3、公路隧道横净距,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
当检修道(人行道,下同)高度大于0.1,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。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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
左车道横净距m(W/2B)/20.5L[J0.25],FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
………………………3-1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
右车道横净距m(W/2B)/20.5L[J0.25],FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
………………………3-2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
表5,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
公路隧道提供的最大横净距(单位:m)
,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

设计速度,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

m1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

m2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

m3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

左侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

右侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

左侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

右侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

左侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

右侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

120,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.225 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.875 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.525 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.875 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.975 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.275 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.225 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.875 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.525 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.875 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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100,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.975 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.275 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.725 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.025 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.975 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.275 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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80,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.975 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.025 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

2.725 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.775 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.125 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

2.975 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

2.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.025 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

60,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

1.975 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

1.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.025 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

2.725 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.775 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.125 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.975 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.025 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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80,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.225 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.875 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.025 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.225 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

2.875 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4.025 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.475 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.125 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4.275 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

60,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

1.850 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

1.500 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

2.650 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.000 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

2.850 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

2.500 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.650 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4.000 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

3.100 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.750 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.900 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4.250 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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40,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.600 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.250 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.400 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.750 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.350 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.000 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.150 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.500 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.600 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.250 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.400 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.750 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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40,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.600 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.250 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.400 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.750 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.350 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.000 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.150 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.500 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.600 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.250 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.400 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.750 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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30,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.475 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.125 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.275 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.725 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.375 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.525 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.875 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.975 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.625 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.775 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.125 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.600 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.250 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.400 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.750 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.850 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.500 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.650 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.000 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2.100 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1.750 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

2.900 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3.250 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

4、隧道视距平曲线半径,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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:,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
 ……………………………4-1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
式中: —实际横净距,米;,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
      —计算车道中线处的曲线半径,米;,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
—(货车)停车视距,米。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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0.30.5,误差可以忽略。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
………………………………………4-2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

表6,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
公路隧道视距平曲线半径计算值(单位:米)
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,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

设计速度,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

安全视距半径R1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

一般视距半径R2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

最小视距半径R3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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左侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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右侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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左侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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右侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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左侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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右侧车道,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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小车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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货车,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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120,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2478,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4002,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1564,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1936,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1853,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2858,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1289,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1622,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1709,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2610,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1218,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1539,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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100,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1620,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2492,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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977,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1117,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1174,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1705,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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795,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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926,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1076,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1543,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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749,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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876,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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80,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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766,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1202,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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500,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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579,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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555,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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822,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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401,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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473,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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508,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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744,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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376,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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446,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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60,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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380,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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602,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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265,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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301,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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361,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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193,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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226,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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328,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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180,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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213,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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40,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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125,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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250,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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83,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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114,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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85,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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156,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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63,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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89,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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77,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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139,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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59,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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83,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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40,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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125,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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250,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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83,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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114,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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85,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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156,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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63,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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89,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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77,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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139,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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59,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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83,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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30,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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76,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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136,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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49,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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65,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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94,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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41,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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19,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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17,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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24,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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29,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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17,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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15,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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表7 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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公路隧道视距平曲线半径建议值(单位:m)
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一般视距半径R2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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最小视距半径R3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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120,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4005,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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11600,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2860,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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8285,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1625,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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7565,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4460,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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100,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2495,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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6975,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4770,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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930,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2590,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1545,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4315,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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880,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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625,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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620,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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60,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

350,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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--,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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6、纵坡路段视距平曲线半径,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
9,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
纵坡路段货车停车视距修正值(单位:米),FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

设计速度,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

平坡路段,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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6,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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标准,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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指南,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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标准,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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指南,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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标准,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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指南,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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标准,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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指南,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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标准,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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指南,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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标准,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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指南,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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120,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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245,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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417,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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12,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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66,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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85,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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28,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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101,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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100,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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180,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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301,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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46,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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10,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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59,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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15,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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71,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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20,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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112,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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80,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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125,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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202,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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30,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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39,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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7,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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46,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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11,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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64,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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14,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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81,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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60,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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85,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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120,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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17,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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22,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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6,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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26,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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8,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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36,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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10,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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45,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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10,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
《标准》纵坡修正后的视距半径表,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

设计速度(km/h),FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2%,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3%,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4%,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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5%,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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6%,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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左偏,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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右偏,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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R1,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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120 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4403 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2131 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4682 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2265 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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4969 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2404 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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100 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2633 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1180 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2777 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1245 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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2925 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1311 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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3077 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1379 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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80 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1260 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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607 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1300 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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626 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1340 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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645 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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1423 ,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2

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7、竖曲线视距半径,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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R
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为了便于运用,对于标准车型小客车、货车可分别简化为6-26-3近视计算公式:,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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8、结语,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
参考文献,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
[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.,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
[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.,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
[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.,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
[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.,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
[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.,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
作者简介,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
1、,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
2、,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
王跟民:陕西省林业勘察设计院公路分院,工程师。,FPSf%ý+bbs.3c3t.como÷¶¦¥3T€2
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