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内容提要:本文论述了我国铁路部分区间复线的发展过程,说明绝大多数部分区间复线是在复线施工过程中形成的,作为加强区间通过能力的一种措施,采用的不多。根据九个区段,不同复线区间比例的图解资料,分析了部分区间复线提高平图能力、列车旅速的幅度及缩短旅行时间、减少起停车次数的百分率;对单线、部分区间复线区段平图列车旅速通用计算式进行了探讨。文章阐明了采用部分区间复线的条件。认为部分区间复线既可作为修建复线工程的可能顺序,也可作为从单线到复线逐步提高输送能力的有效措施。
Abstract: This article discusses the development process of double-track railway in some sections of China’s railway and shows that most of the double-track railway in some sections is formed during the construction of double-track railway. As a measure to strengthen the passing capacity of the railway, it is not used much. According to the graphical data of the proportions of nine sections and different double-track sections, the paper analyzes the ability of some section double-track lines to increase the level-plot capability, the range of train speed and the travel time, and reduce the percentage of stopping times. The general formula of train speed is discussed. The article clarifies the condition of using double-line in some sections. It is considered that some of the interval double-track can be used as a possible sequence for the construction of double-track projects and also as an effective measure to gradually increase the transmission capacity from single-track to double-track.