准移动闭塞列车安全间隔时间的计算

Calculation of Time Interval between Two Trains in Moving Block Signal System

准移动闭塞是一种既能保证行车安全，又能提高运输效率的信号制式。本文在简略介绍准移动闭塞特点的基础上，推导出了城市轨道交通工程项目设计中移动闭塞、常规自动闭塞和准移动闭塞的列车安全间隔时间计算公式，并根据本文得到的计算结果提出准移动闭塞中定位单元长度的优化设计推荐值及有关结论。

Moving like block is a kind of signal system which can ensure running safety and raise transportation efficiency. On the basis of the brief introduction about the foundation and characteristics of moving like block, this paper makes detailed discussion about the safety time interval between two trains, offers computation formulas, lists some calculation results and analyzes them.