青藏铁路格拉段区间通过能力的研究

Study on the Carrying Capacity of Golmud—Lhasa Section of Qinghai—Tibet Railway

按照青藏铁路格拉段运输组织的要求,旅客列车必须在白天发到。因此,此区段的列车运行图结构具有纵向按区间分段,横向按时间分带,客、货列车分时运行的特点。在对列车对数(或组对数)与列车交会次数、列车交会占用中间站数和区间数、及其对应区间最大列车运行图周期等因素相互关系进行理论分析计算的基础上,根据不同对数列车集中交会占用时间带的控制范围,分别推算出客、货列车最大行车量。计算结果表明:在预留3 h维修天窗的条件下,按站间闭塞普通运行图的客、货列车最大行车量分别为6对;按虚拟自动闭塞追踪运行图的客、货列车最大行车量分别为10对。以理论计算可能达到的最大客、货列车行车量为目标所铺画的模拟列车追踪运行图,其结果与理论推算结果基本一致,验证了该计算方法的适用性。

According to the requirements of traffic organization for Golmud-Lhasa section of Qinghai- Tibet railway, passenger trains have to run at daytime, which causes its train diagram to have several disparate parts divided vertically by stations and horizontally by time, and both passenger and freight trains mostly run within their own time zone. In allusion to this characteristic, the relations between number of trains and such factors as number of meeting, number of stations and sections occupied for meeting, and period in corresponding train diagram are analyzed, based on which the maximum numbers of passenger and freight trains are reckoned. The result is, with 3 hours of maintenance time, the possible maximum numbers of passenger and freight trains are 6 pairs respectively when blocked by stations, and 10 pairs respectively for virtual automatic block. Stimulated train diagram for virtual automatic block verifies the applicability of the calculating method.