With the growing complexity of urban passenger transport demand in China, in order to facilitate the rapid assessment on the carrying capacity for coordinated operation of multi-routing and express/local trains in urban (suburban) railways, an assessment method based on timetable structure reasoning and key control point analysis is proposed. First, based on known overtaking stations and turnback track settings, key control points of the railway corridor are identified through structural reasoning of the timetable, and a general formula for the minimum cycle of the timetable is derived. Second, a calculation method for the number of local trains on minor routes is introduced to propose a minimum cycle assessment method under the combination of multi-routing and express/local trains. Then, a control point-based search algorithm is designed to solve the maximum transport capacity using a combined search strategy. Finally, the model's effectiveness is verified through field case analysis of multi-type lines. The results indicate that in the single-routing mode, when the ratio of express/local trains combination is 1∶1, it has the lowest carrying capacity of 13 trains · h-1. In the multi-routing mode, when the ratio of express/local trains combination is 1∶1, it also has the lowest carrying capacity, but as the number of local trains or minor-route trains increases, the carrying capacity significantly improves. When the ratio of the operation number between major-route local trains, major-route express trains, and minor-route local trains ranges from 1∶2∶0 to 1∶2∶3, the carrying capacity increases from 14 trains · h-1 to 19 trains · h-1. This method establishes a theoretical framework for evaluating the coordinated operation capacity of multi-routing express/local trains in urban (suburban) railways, which can serve the route planning and transport organization decision.
该试验线路共设18个车站,采用下行方向从左至右依次编号为A—R的排序方式,其中车站D,H和M设置为越行站,H和R为折返站。运营列车采用4节编组的市域D型列车,城市外围区段设计速度为200 km · h-1,中心区段设计速度为120 km · h-1,列车控制系统采用CBTC系统,线路站间距与区间运行时分等具体参数见表1。
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