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一、前言为适应铁路运量的增长,提高线路通过能力和运行速度,各铁路局自1958年起先后铺設了一些大号碼道岔,至1961年底,計有:上海铁路局設計的10.337米割线型尖軌三次抛物线20号道岔;哈尔濱铁路局設計的9.084米直线型尖軌园曲线18号道岔;铁路专业设计院設計的12米半切线型尖軌园曲绕18号道岔,以及根据60年全国铁路第一次大号碼道岔技术会議确定的統一参数,由铁路专业設計院設計的11.2米半切线型尖軌园曲线18号道岔和11.2米尖軌三次拋物线18号道岔;铁道科学研究院設計的
I. INTRODUCTION In order to meet the growth of railway traffic volume and increase the capacity and speed of transmission lines, various railroad turnouts have been laid successively since 1958. By the end of 1961, there were: 10.337 meters designed by Shanghai Railway Bureau Cut off the sharp point of the third-order parabola 20 turnout; Harbin Railway Bureau designed 9.084 m linear curve Track 18 Park Turnout; Railway Design Institute of Design 12 m semi-tangent curved rail around Park Turn 18 Turnout, and according to 60 years of national railway first large-size turnout technology conference to determine the uniform parameters, designed by the Railway Design Institute of 11.2 m semi-tangent tip rail Park Curve 18 turnout and 11.2 m rail track parabolic 18 turnout; Railway Institute of Science design