Research On Evacuation Capacity Evaluation For Urban Rail Transit Transfer Hubs

The characters of urban rail transit hubs are closed, big and complex. Once there is an urgent accident, it's difficult to evacuate and always cause heavy casualties. In present, the design and evaluation methods on the hub's evacuate capacity exist disadvantages; The study of pedestrian dynamic microcosmic theory also achieved abundant achievements, but compared with actual situation still exist deviations. Based on national natural science fund project "Research on evolution law and mass pedestrian clustered crowded dynamics model under Complex traffic system" to study the evacuation capacity assessment, so as to achieve safely operation.First, figure out transfer hubs evacuation time and the number of safe evacuation for the construction safe evacuation standards. According to the survey data get the characteristics of hubs and the passengers. Analysis the factors of evacuation facilities attributes, evacuees characteristics and management organization which influences of evacuation ability. For evacuation facilities capacity calibration, achieve social force model and the most short circuit model, to simulation the influence of evacuation passageway width, number of sluice machine evacuation ability. Use of simulated data fitting SPSS, get the prevailing rate of evacuation channel and ticket barrier, compare to metro design specification, and the prevailing rate metro design specification facilities compare to traffic rate, fixing its values.In this paper, evacuation capacity is divided into emergency evacuation and big passenger evacuation, layout capability evaluation index system. Using the simulation software SRAIL which is developed by our groups, evacuation simulation method is studied from evacuation scene design, evacuating the simulation process steps, and evacuation environment simulation parameters sets. Finally set Beijing metro line 5 The Lama Temple station as an example, research the evacuation ability simulation assessment. Find out the problems which existed in evacuation process, combined with investigation and evacuation simulation put forward the improvement suggestions.The results of the study show that The Lama Temple station's evacuation ability can meet the requirement safe evacuation.