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前言 随着我国社会主义革命和社会主义建设事业的发展,铁路交通运输的客货运量日益增长,为了满足政治、经济、国防的要求,除新建铁路外,对既有铁路技术改造以加强其运输能力具有重要的意义。同时,既有铁路由于标准低,设备落后,或因某些地段病害严重难予处理,或随着铁路运量的不断增长,机车轴重的加大,行车速度的提高,也常需改建。既有铁路的技术改造,首先是既有线的改建,包括:信号、通信、闭塞方式的改进,增设或移设会让站,改变牵引种类和机车车辆类型及相应的延长车站股道,落坡和改善线路平面,改建
Preface With the development of our country’s socialist revolution and socialist construction, the volume of passenger and freight transport by railways has been increasing. In order to meet the requirements of politics, economy and national defense, in addition to the construction of new railways, the existing railway technologies have been transformed to enhance their transport Ability is of great importance. At the same time, the existing railways often need to be rebuilt due to low standards, backward equipment, serious treatment of diseases in some areas, or the continuous increase of railway traffic volume, the increase of axle load and the increase of traffic speed. The existing railway technical transformation, the first is the reconstruction of existing lines, including: signal, communication, blocking the way to improve, add or move will make the station, change the type of traction and rolling stock type and the corresponding extension of the station shares Road, And improve the line plane, remodeling