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一、概述 六十年代初出现了高速铁路。七十年代初又出现了重载铁路。为了适应繁忙重载铁路的发展,许多国家对线路轨道结构作了相应的改造,将常规线路每延米轨道结构的重量从2000kg增加到5000kg(60kg级的轨道结构),对线路的技术条件要求更高了。六十年代以后逐渐出现了开大“天窗”进行综合机械化、自动化作业,对线路作业的组织和工艺提出了新要求。
I. Overview High-speed rail appeared in the early 1960s. The beginning of the seventies again appeared heavy rail. In order to adapt to the development of heavy heavy haul railways, many countries have made corresponding modifications to the line rail structure, increasing the weight of conventional rail lines per kilometer rail structure from 2000 kg to 5000 kg (60 kg grade rail structure). The technical requirements of the line Higher. After the 1960s, a large “skylight” was opened to carry out comprehensive mechanization and automation operations, putting forward new requirements on the organization and workmanship of the line operations.