在华主席党中央抓纲治国的英明决策指导下,工农业生产突飞猛进,给铁路建设提出了更多更高的任务和要求,其中不但要修筑大量新干线,而且要大量改造既有干线和修建相当多的复线;不但要增加铁路的运输能力,而且要改善铁路的运营条件,提高列车运行速度和列车牵引定数。对铁路设计人员来说,要完成上述任务,首先要提高设计速度和设计质量,目前现有铁路改建平面计算方法不能满足上述要求,园曲线半径和缓和曲线长度 Under the wise policy decision of the Central Party Committee of the Chinese Central Committee in grasping the rule of the state and governing the country, rapid progress has been made in industrial and agricultural production, putting more and higher tasks and demands on the railway construction. Not only will it have to build a large number of Shinkansen lines, but also transform a large number of existing trunk lines and structures A considerable number of double-track; not only to increase the transport capacity of the railway, but also to improve the operating conditions of the railway to improve train speed and train traction set number. For railway designers, to accomplish the above tasks, we must first improve the design speed and design quality, the existing railway reconstruction plan can not meet the above requirements, the radius of the curve of the curve and the length of the relaxation curve