基于法国规范的公路隧道最小平曲线取值研究

结合阿尔及利亚某高速公路隧道路段平面设计经验，研究法国规范体系下隧道路段平曲线最小半径；从平曲线半径、停车视距等规范规定入手，分析得出最小平曲线值计算方法。分析表明:影响隧道路段平曲线最小半径值的因素有视点位置的选择、隧道洞身尺寸、纵坡值等；设计中需结合纵坡值，对左右幅停车视距进行单独验算，以确保行车安全。

Research on the Value of Minimum Curve Radius of Highway Tunnel Based on French Code

Combined with plane design experience of a highway of the tunnel sections in Algeria, the minimum radius of the tunnel section plane curve under French code system is studied. Starting from French code regulations on the radius of the plane curve and the stopping sight distance, the factors that need to be considered in the calculation of the minimum radius of the plane curve to meet stopping sight distance have been analyzed and the calculation method of the minimum radius of the plane curve value has been obtained. The analysis shows that the factors affecting the minimum radius of the flat curve of the tunnel section include the choice of view point, tunnel size, longitudinal slope value, etc. The left and right parking sight distances should be checking calculated separately to ensure the safety of driving combining with longitudinal slope value in the design process.