公路隧道长陡人行横通道内疏散时间仿真研究

Study on Evacuation Time in Long and Steep Crossing Passages of Highway Tunnels

在公路隧道改扩建过程中,由于工程地质条件和可用空间的限制,新旧隧道间所设横通道出现长且陡的状况,对人员疏散造成影响。针对新旧公路隧道间长陡人行横通道内人员疏散状况,文章采用仿真模拟法,研究横通道长度、坡度及间距对人员疏散特性的影响规律。研究发现:(1)长陡人行横通道内群体疏散过程中存在"梗塞体"现象,造成群体疏散平均时间增大;(2)人行横通道长度和坡度的存在对疏散造成负面影响,该影响随长度和坡度的增加而加剧。为缓解该负面影响,横通道内部可设置休息平台及指示标志。

In the process of reconstruction and expansion of highway tunnels,due to the limitation of engineering geological conditions and available space,it is inevitable to set the long and steep cross passage between the new and old tunnels,which has an impact on the evacuation of people.Aiming at the evacuation situation in the long and steep cross passage between the new and old highway tunnels,this paper used simulation method to study the influence of the length,slope and spacing of the cross passage on the evacuation characteristics.Results show that:(1)in the process of group evacuation in the long and steep cross passage,the phenomenon of"block body"exists,which causes the increase of the average time of group evacuation;(2)the existence of length and gradient of pedestrian cross passage has a negative impact on evacuation,and it increases with the increase of length and gradient.In order to alleviate the negative impact,a rest platform and an indication sign can be set inside the cross passage.