城市道路平面交叉口与隧道出口最小安全间距探讨

A discussion of the minimum safe distance between the plane intersection of the urban road and the exit of the tunnel

平面交叉口和隧道作为城市道路的重要组成部分,其合理的安全间距值直接影响城市道路构造物的设置位置和交通运行质量。该文通过界定城市道路平面交叉口与隧道出口最小安全间距的定义,分析城市道路平交口与隧道出口安全间距的各种影响因素,提出了不同设计速度道路平交口与隧道出口的最小安全间距值,可为同类工程设计提供参考。

The plane intersection of the urban road and the tunnel, as an important part of the urban road, the setting position of the urban road structures and the quality of traffic operations were directly affected by its reasonably safe spacing values. In this paper, the minimum safe distance between the road intersection and the exit of the tunnel were definified, and various of factors affecting the safe distance between the plane road in- tersection and the tunnel were also analyzed, finally the minimum safe distance between the different design speed of road intersection and the exit of the tunnel were propouded, which could be introduced into actual engineering design.