Calculation Of Throat Carrying Capacity Of High-speed Railway Station Based On Segment Unlocking

With the operation of high-speed railways in my country,the problem of the mismatch of high-speed railway station and interval capacity is very prominent,especially the throat route where multiple lines meet has become the main bottleneck restricting station capacity.Compared with the section,the station yard has a large horizontal width,more interference in the route of receiving and departure trains,and long travel distance in the throat area.The operation time is long,and at the same time,it is affected by the entry and exit of the trains in the EMU Depot,so the throat carrying capacity is more restrictive.Therefore,based on the existing research of domestic and foreign scholars,this paper starts from the calculation of the throat carrying capacity,analyzes the dynamic and static influence factors of the throat carrying capacity,and based on the established station pattern,taking the throat route as the research object,proposes high-speed railway station throat carrying capacity calculation model based on segmented unlocking.Aiming to provide a certain reference for the layout or design of the station and throat area.(1).This paper starts with the throat carrying capacity of high-speed railways,and analyzes its dynamic and static influence factors.The main factors that affect the throat carrying capacity of a given high-speed railway passenger station are train diagram,train braking speeds outside the station,and station operations planning,arrival and departure track utilization planning,intervention of staff,and unlocking methods of stations.(2).Based on the research of graphic method,analytical calculation method,and simulation method,the calculation thought of the throat carrying capacity is proposed under segmented unlocking.The calculation of the throat carrying capacity is described in detail from the four dimensions of characteristic analysis,basic principles,calculation steps,and existing problems.(3).In order to make the train clear the throat quickly,provide time and space conditions for the subsequent train operation,improve the throat carrying capacity.consider segment unlocking,aiming at the maximum number of incoming and outgoing trains per unit time in the throat area and the balance of the use of arrival and departure lines,the theory capacity calculation model of the throat is constructed.(4).According to the throat carrying capacity calculation model,a tabu search algorithm is introduced to solve the problem.And,the minimum time of the end of the latest train operation is used as calculation indicators.In addition,combining the characteristics of the problem,following the principle of the most beneficial to the subsequent throat route,the initial route allocation plan is generated.And,the disturbance operator is used to construct the neighborhood solution,and the solution space is divided in units of subnets,thereby improving the solution convergence speed.(5).Combined with examples(Xi’an North*Zhengxichang),the station topology is divided into relay collection sections,the existing train flow is used as the input flow.And,obtain the throat theory of the high-speed railway station under the specified train arrival and departure order through the throat carrying capacity calculation model.Finally,with the help of graph method is to analyze quantitatively calculation value.