考虑站型组合的市域轨交线路通过能力计算方法

A Calculation Method for Line Carrying Capacity of Suburban Rail Transit Considering Station Layout Combination

摘要:

快慢车模式下，恰当的越行有助于提高市域轨道交通线路通过能力，但并非所有车站都具备越行条件。为定量把握线路通过能力与包含站型组合在内的众多因素的关系，提出一种线路通过能力计算方法。在掌握各站站型、列车停站方案、列车区间运行时分、列车间隔时间、快慢车开行次序，明确越行发生条件的基础上，按次序逐一引入快慢车，计算列车在每个车站的到发/通过时刻并及时调整被该列车越行的列车的运行时刻，之后引入下一列车，直至线路通过能力饱和。计算案例限定了设有到发线的中间站总数，结果表明，针对不同的快慢车开行比例，站型组合对线路通过能力均有影响，但影响程度不同。计算线路通过能力时应考虑到站型组合的约束。

Abstract:

With express and local trains in mixed operation mode， appropriate overtaking maneuvers can enhance the line carrying capacity of suburban rail transit systems； however， not all stations are equipped with overtaking facilities. To quantitatively analyze the relationship between line carrying capacity and multiple factors including station layout combinations， a line carrying capacity calculation method is proposed. Based on predefined parameters—station layouts， train stopping plans， train running times in sections， trains interval times， and express/local train scheduling priorities—and with the conditions for overtaking clearly defined， the method sequentially introduces express/local trains， calculates arrival/departure or passing times of each train at each station， dynamically adjusts timetables of overtaken trains， and iterates until line carrying capacity saturation is achieved. Case studies with a fixed number of intermediate stations equipped with receiving-departure tracks demonstrate that station layout combinations universally affect line carrying capacity under varying express/local train ratios， but their impacts differ in magnitude. The results emphasize the necessity of incorporating station layout constraints into line carrying capacity calculations.