低等级农村公路小半径曲线黄土隧道通视条件计算研究  

Research on the Visibility Conditions of Small Radius Curved Loess Tunnels on Low-class Rural Roads

作　　者：高昌 路平 王东 GAO Chang;LU Ping;WANG Dong(Shanxi Province Communications Planning Surveying and Designing Institute Co.Ltd.,Taiyuan 030032,China)

机构地区：[1]山西省交通规划勘察设计院有限公司,太原市030032

出　　处：《公路》2025年第1期21-24,共4页Highway

摘　　要：规范要求对于低等级农村公路隧道平面线形应保证两端洞口的通视条件,但缺少相应的计算方法。通过对低等级农村公路小半径曲线隧道的平纵面通视条件研究,推导出适用于小半径曲线隧道平纵面通视条件的计算方法,确定了在保证两端洞口通视的条件下,可在曲线上设置的最大隧道长度,并建立了隧道两端洞口纵向通视检验公式。The specification requires that for low-class rural roads,the tunnel plan geometry should ensure visibility conditions at both portal,but lacking corresponding calculation methods.In the paper,through the study of horizontal and vertical visibility conditions,a visibility calculation method of small radius curve tunnels on low-class rural roads is derived,the maximum tunnel length that can be set on the curve under the condition of ensuring visibility is determined,so as to establish a visibility test formula at both portal.

关 键 词：低等级农村公路 小半径曲线隧道 隧道视距 两端洞口 

分 类 号：U491.21[交通运输工程—交通运输规划与管理]