提速干线编组站出发子系统内部匹配与协调关系

分析提速干线编组站货物列车到发时刻不均衡运营特征,根据编组站作业特点和要求,运用排队论和随机过程理论,对出发子系统转场和接车可靠性、临界密集出发时间进行计算分析。认为出发子系统允许的接车延误概率应控制在0.12以内;当区间通过能力利用率在繁忙时间达0.85以上时,出发场的到发线应在10股以上。提高出发子系统转场和接车可靠性的措施包括:提高无调比、适当增加出发场到发线数量、降低编组调车机车的作业负荷、减小出发时间间隔不均衡系数。给出一定出发强度下的临界密集发车时间计算式,便于指导运输组织工作。改善出发子系统匹配与协调关系的有效途径包括:合理配置列检组数、转线接车延误率控制在10%以内、密集到发期间区段通过能力利用率不能超过90%、降低衔接区间发车时间间隔变异系数、连续高密集发车时间不能超过临界发车时间、适当增加分类线及到发线数量、优化列车运行计划、平衡双向系统作业负荷、加强管理、优化运输组织。

The Matching and Coordinating Relationship of the Departure Subsystem in Marshalling Station on Trunk Line with Increased Speed

The paper analyzes the disproportion characteristics of arriving and departing time of freight trains in marshalling stations on trunk lines with increased speed.Based on the operation characteristics and demands,it uses theories of queuing and stochastic process to analyze computationally the reliability of changing yards and receiving trains and critical dense departing time in the subsystem according to the operating characters and demand of marshalling stations.It argues that the allowable probability of delaying accepting trains should be controlled below 0.12 and the receiving and departure trucks should be more than 10 when the section capacity utilization ratio is over 0.85.The reliability of changing yards and receiving trains in departure subsystem can be improved by increasing the percentage of wagons in transit without sorting,enhancing departure trucks property,lowering loads of classifying locomotives and reducing the disproportion coefficient.The paper also provides a formula to calculate the critical dense departing time under some certain departing intensity and to guide the station operating.It draws some conclusions to improve the matching and coordination relationship of departure subsystem in marshalling stations,such as setting inspector crews in reason,controlling the delay rate of receiving train when changing lines below 10%,the transit capacity rate of section under 90%,reducing the coefficient of variance of departing time interval of the linking sections,none period of dense departing trains continuously exceeding the critical dense departing time,adding classification trucks and departure trucks,optimizing operation plan,balancing operating loads of bidirectional subsystem,enforcing operating management,optimizing the operating of trains,and so on.