Research On Key Techniques About Security Assessment Of Large Passenger Flow Of Urban Rail Transit

Urban rail transit has gradually become the main modal of urban public transport,with the advantages of large capacity,high punctuality,convenient,comfortable,efficient,environmental protection.With the network development of urban rail,the attraction of urban rail transit to the travelers enhances,making traffic pressure increases,leading to large passenger flow happen occasionally.Large passenger flow can threat to safe operation of urban rail transit station,so it is necessary to strengthen the evaluation about operation safety state of urban rail station under large passenger flow,in order to improve the safety management of urban rail transit with large passenger flow,which has the important practical significance.Because urban rail station is the main place to occur large passenger flow and safe hidden trouble,the research content is defined in urban rail traffic in the station operating safety assessment technology research.About the evaluation of operation safety state of urban rail station under large passenger flow,the study includes mainly the following several aspects:a)By using the data processing method,the travel path recognition technology based on the credit card data is studied.Then a large passenger flow recognition model is constructed according to the passenger flow rule and the train operation rule.From the macroscopic and microscopic two angles,large passenger flow characteristics system is built:strength,size,time,and space.b)Combining the network theory with the concept of large passenger flow,based on the analysis of the factors influencing urban rail station safety operation and the relationship between network and large passenger flow,the viewpoint is forwarded that important influence factors of the station operation security under the large passenger flow state include local network structure,transportation capacity,and the characteristics of large passenger flow.Then the operation safety assessment index system of urban rail station from the network structure,transmission capacity,large passenger flow condition,equipment,environment and management is built.c)Based on Entropy value method and the matter-element,the operating safety assessment methods of urban rail station under the large passenger flow and uses entropy method for determining the weights of evaluation indexes is established.Then real time security early warning is researched,including the warning level classification,the realization process and the system structure design of early warning.Urban rail transit in Shanghai as an example,through identifying stations under large passenger flow,47 stations occurred large passenger flow during 08:00:00am-08:10:00am on March 1,2016,mainly distributing on line 1,line 2,line 8 and line 9.Then the built assessment method is used to evaluate the stations under large passenger flow,and the results showed that the security level of the stations under large passenger flow is generally poor,two-thirds in C?D level.