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我国铁路铺用25米轨以来,在接头构造方面,一直存在着轨缝问题,至今尚未彻底解决。早在1966年,铁道科学研究院就曾提出过“关于铺设25米钢轨地区温度限制的初步意见”〔见(66)铁科建字第33号文〕。在此之前,齐齐哈尔局境内也做过一些25米轨轨缝变化的实地测试。七十年代初期先后编制的现行《铁路工务规则》(草案)、《铁路工程技术规范》(试行)和《铁路铺轨、铺碴工程施工
Since the railway has been used for 25 meters in our country, there has been a problem of rail joints in the construction of joints, which has not yet been completely solved. As early as 1966, the Academy of Railway Sciences proposed the Preliminary Opinion on Temperature Limits in Laying 25 Meters of Rail (See (66) Textbook No. 33). Prior to this, there were also some field tests conducted in Qiqihaer Bureau on the variations of 25-meter orbit track seams. The existing “Rules for Railway Construction” (Draft), “Technical Specifications for Railway Engineering” (for Trial Implementation) and "Railway Derailment and Ballasting Construction