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为了测定铁路技术站到发车流时空上的不均衡性,分析了到发车流时间、列车到发数量、技术站衔接方向的特点,提出了到发车流不均衡性的计算方法。通过分析技术站到发车流的时空不均衡性对技术站的影响,考虑了不同衔接方向的车流结构、转化范围与到达间隔时间,设定了线路方向、列车数量等相关参数。应用最大方差比值法,计算了到发车流时间与不同衔接方向到发车流数量的不均衡程度,基于基尼系数,计算了不同时间段车流到发数量的不均衡程度。从空间、时间、数量3个角度将到发车流的三维不均衡特性进行分解,描述了到发列车数量与时间、空间转换的关系,建立了铁路技术站到发车流的不均衡三维度量方法,并以贵阳南站为例进行了实例验证。研究结果表明:当接车数量为67列、计算时间为12h、接车数水平设置为4时,不同衔接方向到发车流数量的不均衡程度为0.21,到发车流时间的不均衡程度为0.03,不同时间段车流到发车流数量的不均衡程度为0.13。车流总体比较均衡,符合贵阳南站的实际情况。
In order to determine the time-space imbalance between railway technology station and departure grid, the characteristics of departure grid arrival time, train arrival number and technical station connection direction are analyzed, and the calculation method to the unbalance of departure grid is proposed. By analyzing the impact of technical station to departure flow on the technical station, the traffic flow structure, conversion range and arrival interval of different convergence directions are considered, and the relevant parameters such as the line direction and the number of trains are set. The maximum variance ratio method is used to calculate the imbalance between the departure flow time and the departure flow number in different convergence directions. Based on the Gini coefficient, the imbalance between traffic flow and arrival quantity is calculated. This paper decomposes the three-dimensional unbalanced characteristics of departure traffic flow from three aspects of space, time and quantity to describe the relationship between the number of arriving vehicles and time and space conversion, and establishes an unbalanced three-dimensional measurement method from railway technical station to departure flow. Taking Guiyang South Railway Station as an example, an example is given. The results show that when the number of vehicles to be picked up is 67, the calculation time is 12h and the number of pick-up vehicles is set to 4, the imbalance degree between the different connecting directions to the starting flow is 0.21, and the unbalanced time to the starting flow is 0.03 , The unbalanced degree of the traffic flow to the starting flow at different time periods is 0.13. Overall traffic flow is more balanced, in line with the actual situation of Guiyang South Railway Station.