The Study On Evacuation Of Subway-mall Underpass And Underground Expressway

The subway transportation as an important part of city infrastructure facilities have the advantages of safety, high efficiency, environmental friendly and develop rapidly in recent years. Due to the overall city planning needs, some underpasses of the subway station can lead straight to malls. These underpasses of subway-mall usually have high pedestrian volume and are disadvantageous for pedestrian evacuation. Underground expressway with advantages of flexible line, fast, less limited by environment make full use of underground space, although it may break out of fire by motor vehicle accidents. In summary, there will be important practical value and realistic significance to make study on pedestrian evacuation of subway-mall underpass and underground expressway.This paper takes Beijing four different subway-mall underpasses and underground expressway as the main object of study. Investigation of pedestrian features had been carried in four different and typical subway-mall underpasses and obtain the basic parameters of pedestrian characteristics. Evacuation computer simulation models of subway-mall underpass and underground expressway are established by using two different software of STEPS and LEGION. By analyzing and contrasting the results of simulation, obtain pedestrian distribution, pedestrian density curve, pedestrian speed curve and curve of evacuation time in different scenarios. Relevant research provides theoretical foundation for evacuation design and provides reference for fire warning and emergency evacuation in disasters, it has certain application value.