公路短隧道通透率计算方法及其影响因素

根据短隧道行车的视觉特点,分析了短隧道通透率与观察视场之间的关系,以此为基础,建立了直线短隧道和曲线短隧道的通透率与隧道结构参数之间的关系,得到了不同结构短隧道的通透率随长度和半径等参数的变化关系,并与采用图像处理法对仿真建模和实际工程的短隧道通透率进行比较验证。结果表明,采用基于隧道结构的短隧道通透率的计算方法不仅准确便捷,并且完全不受隧道建设工期影响,在隧道设计及建设之初就可得到准确的短隧道通透率,使得采用短隧道通透率进行隧道照明节能设计成为可能,可促进我国隧道照明节能与安全技术的进步。

Calculation Method and Influence Factors of Intervisibility for Short Tunnel

Based on visual characteristic of short tunnel driving, the relation between intervisibility and observation field is analyzed, and the model of intervisibility which is based on structural parameters of straight and curved short tunnel is built. Then, the change rule of intervisibility along with structural parameters of tunnel such as length or radius is deduced, which is compared and verified by image processing method for simulation modeling and actual project. The result shows that based on tunnel structure, the calculation method of short tunnel is not only accurate and convenient, but is not influenced by tunnel construction period. The intervisibility of short tunnel can be get at the beginning of the design and construction for tunnel. Therefore, it is possible for tunnel lighting energy saving design when intervisibility is employed, that can promote the progress of tunnel lighting energy saving and safety technology in our country.