The Study Of Carrying Capacity On Large High-speed Railway Station

In recent years,China’s high-speed railway network has been constantly improved,and has covered most big cities in China.With the increasing travel demand of passengers,the railway network capacity,especially the imbalance of high-speed railway passing capacity points and lines,has become increasingly prominent.At present,the calculation method of passing capacity of existing passenger stations is still used in high-speed railway stations,which fails to take into account the great differences between large high-speed railway passenger stations and existing passenger stations in running train types,running speed,train operation plan,train operation density and station operation time standard.The station capacity has not been better developed,and the capacity calculation of high-speed railway station has not formed a unified and mature theory and system method.Firstly,the paper analyzes the influence of different fixed equipment on the overall trafficability of the station.In the design of station yard,the specific layout of arrival departure track,throat area and bullet train section should be considered comprehensively,which can not be simply separated,and the fixed equipment interact and restrict each other to jointly determine the overall passing capacity of the station.Then,the paper analyzes the influence of high-speed railway station technical operation content flow,corresponding time standard,train interval time and other factors on the station capacity.The operation contents and corresponding time of trains with different operation types and different speed grades in the station are also different.Finally,the paper analyzes and calculates the trafficability of high-speed railway station,and based on this,puts forward the available trafficability which is more instructive to the actual production organization of the station.In order to solve the available trafficability of the station in a certain period of time,multiple constraints are imposed on the arrival departure track and throat route occupation.A comprehensive application model of the arrival departure track and throat capacity is proposed by integrating the arrival departure track capacity and throat capacity of the high-speed railway station,and the Lagrange relaxation algorithm is used to solve the problem.Based on the actual receiving and departure train operation plan of a large high-speed railway passenger station in a certain peak period of a day,the throughput capacity of the throat and arrival departure line of the high-speed railway station in different periods of the day is calculated first,then the data is brought into the comprehensive model constructed in the paper,and then the available throughput capacity of the peak period is obtained by applying the corresponding algorithm.By comparing the results,it is found that the value of utilization algorithm is small.One of the important reasons for this situation is that the value of the air cost coefficient in the process of solving the utilization algorithm is interfered by many human factors,so it is difficult to find an exact value to reflect the actual air cost time,and the comprehensive model can effectively avoid such defects.Comparing the results,it is found that the value of the utilization algorithm is small.One of the important reasons for this situation is that the value of the air cost coefficient in the process of solving the utilization algorithm is interfered by many human factors,so it is difficult to find an exact value to reflect the actual air cost time,and the comprehensive model can effectively avoid such defects.Finally,some coefficients are introduced to analyze and compare the usage of arrival departure line and throat area before and after the model treatment.The results show that compared with the use of arrival departure track,the use of throat switch group has not been significantly improved.The reason for this phenomenon is that the capacity of large high-speed railway passenger station,especially in peak hours,is more limited by the capacity of throat switch group.