山区高速公路螺旋展线隧道圆曲线半径分析  

Study on Minimum Tunnel Radius of Helix Line Development in Mountain Highway

作　　者：李峰伟 

机构地区：[1]河南省交通规划设计研究院股份有限公司,郑州450052

出　　处：《交通科技》2017年第6期75-78,共4页Transportation Science & Technology

摘　　要：为保证螺旋展线方案隧道平面线形的安全,应确定不需要加宽隧道内轮廓的圆曲线最小半径,以新晋高速公路块村营至营盘段为依托,考虑汽车在隧道内行驶特点和规律及影响隧道内视距的因素,计算满足隧道内螺旋展线停车视距的最小平曲线半径。通过保证视距的临界曲线半径验算和技术经济比较,寻找具有代表性且经济合理、技术安全的隧道螺旋展线方案。In order to ensure the helix line development scheme of the tunnel alignment safety,the minimum radius of circular curve without the need to widen the inner contour of the tunnelis determined.Based on Kuaiying to Yingpan section of Xinjin expressway,the vehicle characteristics and rules and influence factors of tunnel sight distance in tunnel are taken into account to calculatethe minimum curve radius satisfying the spiral development and stopping sight distance in the tunnel.Through the calculation of the critical curve radius and the comparison of technology and economy,a representative,economicreasonable and safe technique for the helix line expansion is found.

关 键 词：山区高速公路 螺旋展线 隧道 最小圆曲线半径 

分 类 号：U412.366[交通运输工程—道路与铁道工程]