基于压滤列车运行线的市域铁路通过能力计算方法

A Train Schedule Line Compression-filtration-based Method for Line Carrying Capacity Calculation of Suburban Railways

摘要:

针对城际列车、市域快慢车共线运行且不规律开行等场景，为了快速准确地计算市域铁路通过能力，借鉴国际铁路联盟UIC 406运行图压缩法但不依赖列车运行图，提出计算能力的压滤法。按一定次序逐一引入列车运行线，压缩列车与前车的间隙，视条件以在特定车站（提前）越行特定列车等方式规避原有障碍并继续压缩，如此反复直至不能再压缩，实现列车运行线的紧密铺画并得到线路通过能力。以某在建市域铁路为例，针对不同城际列车跨入时刻、不同快慢车比例，分别计算线路通过能力。结果表明：线路通过能力随城际列车跨入时刻的变化而无规律振荡，最早引入城际列车通常可实现较大能力；快慢车7：1至4：1时线路通过能力较小，越偏离这一比例范围线路通过能力越大。

Abstract:

Aiming at scenarios involving a mixed operation of intercity trains and suburban express/local trains with irregular scheduling， this study proposes a compression-filtration-based method to rapidly and accurately determine the line carrying capacity of suburban railways. The proposed method draws inspiration from the International Union of Railways （UIC） 406 timetable compression method but does not rely on predetermined train timetables. Train schedule lines are sequentially introduced in a predefined order， and the headway between consecutive trains are compressed. Existing operational conflicts are dynamically resolved through condition-based overtaking maneuvers at designated stations. This iterative process continues until no further compression is feasible， thereby achieving tightly packed train schedule lines and determining the line carrying capacity. Taking an under-construction suburban railway as a case study， this paper investigated the line carrying capacity under varying intercity train insertion times and express/local train ratios. The results demonstrate that the line carrying capacity exhibits irregular fluctuations with varying intercity train scheduling times， and the earliest insertion of intercity trains generally achieves higher capacity. Capacity is minimized when the express/local train ratio ranges between 7：1 and 4：1， increasing as the ratio deviates from this range.