一般地铁疏散计算大多是对疏散设施通行能力的分析,然而未能明确地铁车站建筑形式及站厅至站台提升高度的多样性、客流的复杂性等因素对地铁客流疏散是否存在影响以及产生何种程度的影响,需要结合仿真模拟软件进一步分析。主要基于BIM环境利用Pathfinder仿真软件,在满足规定疏散时间的条件下,研究不同建筑形式车站的不同客流量下同一提升高度的客流疏散情况和在同一建筑形式车站的相同客流量下不同提升高度的客流疏散情况,通过数据模拟并分析得到车站建筑形式对站台客流疏散效率影响不大且疏散效果随车站站台至站厅疏散设施提升高度的增加呈现先减小后增大的趋势,其分界点位于疏散设施提升高度值为19 m处。同时,疏散过程中拥堵会造成模拟结果与理论计算结果出现较大偏差,在工程设计时疏散设施要考虑一定程度上的冗余度。
The general metro evacuation calculation is mostly
about analysis of the capacity of evacuation facilities. However, the factors,
i.e. metro station construction form and the diversity of the height of the
station to the platform, the complexity of the passenger flow, etc., affecting
the evacuation of metro passenger flow and their influencing degrees are
unclear. Hence, further analysis should be carried out by combining simulation
software. Based on the BIM environment and Pathfinder simulation software, the
evacuation of passengers at the same lifting height under different passenger
flows of stations with different architectural forms and the evacuation of
passengers at different lifting heights under same passenger flow of stations
with same architectural form are studied when the evacuation time can be
guaranteed. The simulation data and analysis results show that the station
architectural form has little influence on the evacuation efficiency of the
platform passenger flow; the evacuation effect decreases first and then
increases with the increase of the height of the transit facilities, and the
demarcation point is at 19 m. Meanwhile, the emergence of congestion during the
evacuation process will cause a large deviation between the simulation results
and the theoretical calculation results. Therefore, the redundancy of
evacuation facilities should be considered to some extent.