Utilization of carrying capacity of intercity railway station considering different turnaround modes
With the characteristics of public transportation operation,the train arrival and departure operations in terminal stations of intercity railways were mainly operated in a turnaround manner.To control the scale of the stations and to fully utilize the carrying capacity of intercity railway stations,it was necessary to discuss the utilization of the carrying capacity of intercity railway stations under different turnaround modes.The operations of trains in stations were generalized into two categories,namely"moving"and"dwelling".A series of continuous"moving-dwelling-moving"process was generalized as an"operation sequence",which described the operation process of station-front or station-behind turnaround trains.Based on the principle of timetable-based capacity calculation method,the carrying capacity utilization analysis model of intercity railway station was constructed,by which the operation plan of the station was compressed.The optimal solution obtained from the model can be regarded as the scheme with minimum occupation time of the station equipment with the given number of trains.The minimum occupation time was compared with the actual operation time,to calculate the capacity utilization rate of the station.Considering different turnaround train combinations and different headway time,experiments were designed to identify the station capacity bottleneck location.The results of the case analysis are shown as follows.According to the current station headway time standard,when only the station-front turnaround mode is applied,as the station-front turnaround trains account for 48.5%of the total number of receiving and departing trains,the capacity bottleneck of the station shifts from the switch groups to the arrival and departure lines.When the station-front and station-behind turnaround modes are both applied,as the station-behind turnaround trains account for 50%of the total number of turnaround trains,the capacity bottleneck of the station shifts from the arrival and departure lines to the turnaround lines.The research results can provide reference for station yard layout,arrangement of equipment and selection of turnaround mode for stations.
万方数据
维普
