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[文章] 公路隧道视距曲线半径的探讨 [复制链接]

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韩熠1®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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;®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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

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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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
[关键词]隧道  横净距  视距半径  加宽®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
1、视距影响因素及隧道建筑限界®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

表1®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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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)®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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序号®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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设计速度(km/h)®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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120®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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3®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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80®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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60®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.50 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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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˜

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序号®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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设计速度(km/h)®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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车道宽度W®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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侧向宽度L®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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最小人行道J®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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建筑限界净空®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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左侧LL®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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右侧LR®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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净宽®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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净高®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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80二级®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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40二级®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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9.00 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.25 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.75 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4.50 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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6®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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20四级®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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3.00×2®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.50 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.50 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.25 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.25 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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7.50 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4.50 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
2、标准车型与视距®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

表3®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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®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˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

序号®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

设计速度®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

标准停车视距®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

指南停车视距®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

标准货车®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

停车视距®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

指南货车®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

停车视距®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®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˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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5%®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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6%®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

7®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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8®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

9®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1®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˜

210®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

280®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

245®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

417®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

265®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

273®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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--®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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--®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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®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˜

®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˜

160®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

205®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

180®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

301®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

190®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

195®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®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˜

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®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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®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˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

80®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

110®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®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˜

125®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

202®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

130®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

132®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

136®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

139®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4®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˜

75®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

90®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˜

120®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

89®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

91®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

93®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˜

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®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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表4®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
二、三、四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˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

设计速度®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

标准停车视距®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

指南停车视距®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

标准货车®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

停车视距®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

指南货车®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

停车视距®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®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˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3®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˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

5%®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

6%®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

7®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

8®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

9®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1®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˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

110®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®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˜

125®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

202®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

130®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

132®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

136®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®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˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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®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˜

®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˜

75®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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90®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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89®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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91®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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93®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
3、公路隧道横净距®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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公路隧道提供的最大横净距(单位:m)
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120®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2.225 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1.875 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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3.525 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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3.875 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2.625 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4.275 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4.875 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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100®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1.975 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1.975 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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3.025 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4.025 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4.375 ®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˜

1.975 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.625 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.025 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.375 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.725 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.375 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.775 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4.125 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.975 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.625 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4.025 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4.375 ®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˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.225 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.875 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.025 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.375 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.225 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.875 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4.025 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4.375 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.475 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.125 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4.275 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4.625 ®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˜

1.850 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.500 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.650 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.000 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.850 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.500 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.650 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4.000 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.100 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.750 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.900 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4.250 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®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˜

1.600 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.250 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.400 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.750 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.350 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.000 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.150 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.500 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.600 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.250 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.400 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.750 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®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˜

1.600 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.250 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.400 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.750 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.350 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.000 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.150 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.500 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.600 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.250 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.400 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.750 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®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˜

1.475 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.125 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.275 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.625 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.725 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.375 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.525 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.875 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.975 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.625 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.775 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.125 ®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˜

1.600 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.250 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.400 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.750 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.850 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.500 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.650 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.000 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.100 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

1.750 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

2.900 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

3.250 ®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

4、隧道视距平曲线半径®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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:®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
 ……………………………4-1®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
式中: —实际横净距,米;®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
      —计算车道中线处的曲线半径,米;®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
—(货车)停车视距,米。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
………………………………………4-2®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

设计速度®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

安全视距半径R1®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

一般视距半径R2®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

最小视距半径R3®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

左侧车道®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

右侧车道®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

左侧车道®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

右侧车道®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

左侧车道®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

右侧车道®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

小车®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

货车®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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40®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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21®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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18®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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27®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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33®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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19®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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17®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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24®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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29®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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17®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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15®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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表7 ®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建议值(单位:m)
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设计速度®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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安全视距半径R1®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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一般视距半径R2®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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最小视距半径R3®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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左偏曲线®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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指南®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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120®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4005®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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11600®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1940®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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5610®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2860®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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8285®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1625®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4705®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2615®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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7565®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1545®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4460®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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100®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2495®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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6975®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1120®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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3125®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1710®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4770®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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930®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2590®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1545®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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4315®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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880®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2450®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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80®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1205®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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3145®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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585®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1515®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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825®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2150®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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475®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1240®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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750®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1945®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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450®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1170®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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60®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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560®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1110®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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270®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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535®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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385®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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760®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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225®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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440®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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350®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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690®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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210®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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415®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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80®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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160®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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95®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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145®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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85®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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30®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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140®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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60®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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115®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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55®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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100®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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55®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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20®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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45®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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20®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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35®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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20®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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35®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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20®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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5、隧道断面加宽®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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0.551.65分别为80100公里/小时的最大加宽值。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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曲线隧道横净距加宽参考表 (单位:米)®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.25®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.5®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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0.75(0.55)®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1.00®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1.25®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1.75(1.65)®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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120®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2615®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2400®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2225®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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2070®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1935®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1820®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1715®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1620®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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100®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1545®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1410®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1300®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1200®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1120®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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1045®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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980®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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950®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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80®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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750®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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680®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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625®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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620®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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60®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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350®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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6、纵坡路段视距平曲线半径®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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2®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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6®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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245®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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417®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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12®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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66®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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85®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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28®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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101®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜

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7、竖曲线视距半径®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
R
=(S / (a0.5+b0.5))2/ 2----------------6-1®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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:®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
R
=S2 / 4---------------6-2®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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R
=S2 / 6---------------6-3®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
8、结语®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
参考文献®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
[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.®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
[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.®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
[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.®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
[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.®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
[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.®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
作者简介®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
1、®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
2、®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
王跟民:陕西省林业勘察设计院公路分院,工程师。®è¡z;¨¼_¡bbs.3c3t.comC_‘ào®ÂS˜
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