高寒及高海拔地区公路螺旋隧道应用及视距评价  

Application and Visual Distance Evaluation for Spiral Highway Tunnel in Frigid and High-altitude Area

作　　者：乔建刚[1] 郑少华 王艳宁[1] 王文欣[1] QIAO Jian-gang;ZHENG Shao-hua;WANG Yan-ning;WANG Wen-xin(Tianjin Municipal Engineering Design and Research Institute)

机构地区：[1]天津市市政工程设计研究院,天津300000

出　　处：《佳木斯大学学报（自然科学版）》2018年第6期831-833,871,共4页Journal of Jiamusi University：Natural Science Edition

摘　　要：为了研究螺旋隧道方案在高寒及高海拔地区公路爬坡较大段落的实用性,例举了一处工程案例,对案例长大纵坡方案与螺旋隧道方案进行对比,并对案例螺旋隧道分别按照规范横净距及修正后横净距进行了视距评价;螺旋隧道方案降低了纵坡坡率,且由于隧道洞身的遮蔽避免了路面积雪及结冰,降低了运营期间安全风险;螺旋隧道具有一定的安全优势,可作为高寒及高海拔地区公路建设有价值的比选方案。To study the practicability of the spiral tunnel scheme in large climbing highway sections,especially in frigid and high-altitude areas,introduced a project case and compared it with a large longitudinal slope scheme.For the case of spiral tunnel,the sight distance evaluation was separately performed according to the horizontal distance and its revised value by guidelines for design of highway tunnel.Spiral tunnel can reduce longitudinal gradient,and avoid snow accumulation and icing on pavement due to tunnel body's shadow,so the safety-risk during operation was reduced.For a certain advantage of safety,spiral tunnel scheme is expected to be a valuable alternative for highway construction in frigid and high-altitude areas.

关 键 词：高寒 高海拔 螺旋隧道 视距评价 

分 类 号：U452.2[建筑科学—桥梁与隧道工程]