The Critical Rainfall Intensity For Safe Evacuation From Subway Station

At present, the subway has already become a kind of new and highly urban travelerwelcome mode of transportation, has convenient and quick, not traffic jam, don’t delay allsorts of advantages, such as making more and more cities began to build the subway, there aremore and more people choose to the subway as their means of transportation. But the subwaystation is too narrow, the characteristics of the space is relatively closed to make the stationmanagement personnel in the face of sudden emergencies don’t have enough ability to copewith the situation, so the crowd evacuation and escape disaster become a critical problem.Based on Shenzhen metro line6Xitou subway station during flood situation of pedestrianevacuation as an example, the study of dynamics characteristics of evacuation behavior andstation space environment. In reference to domestic and foreign scholars on line based on thestudy of crowd evacuation process, combined with the flood of the station environment,pedestrian evacuation characteristics of a particular area of subway station, the author of thispaper is studied. Specific content is as follows:For the crowd evacuation process of subway station, underground space by invading theground water by analyzing features of water conservancy, underground space safetyevacuation time is determined. Line on pedestrian evacuation based on the analysis of thetypical model, discusses the advantages and disadvantages of several key model and itsmodeling process, and analysis of pedestrian evacuation behavior and psychology.In summary analysis of the characteristics of subway station space structure and theadvantages and disadvantages of various line flow model on the basis of, in view of thepassenger flow of subway station under the condition of special organization method, basedon the lattice gas model, establish platform considering station hall stairs special location,choice of export line change of crowd evacuation model. Which explicitly pointed out thatconsidering the pedestrian psychological situation update rules, and analyze the stairs areaalone, set up a special update rules in the stairs is long and narrow area, finally determined thepedestrian movements in local area.This article established the pedestrian evacuation model as the foundation, to Xitoustation of Shenzhen metro line6as an example, with the aid of Anylogic simulation software,the flood situation within the station of passenger evacuation simulation. Without consideringthe pedestrian choice changes and consider pedestrians export choose to change the twopremise, respectively to do stream of people evacuation process is simulated. In addition, inthis way can more intuitively anticipate various special phenomenon appeared in the processof evacuation, allowing the station manager to prepare the appropriate response. The simulation results show that: with the evacuation model of software performance, can bettershow the station with evacuation line flow movement.This study established the heterogeneous lattice gas model is commonly used in biasedrandom walk lattice gas model on the basis of increased pedestrians certain psychologicalbehavior, to the real description of the station platform layer do stream of people evacuationprocess, improve the level of subway security has a certain reference significance.