摘 要随着经济的进展和对外贸易的不断扩大，既有铁路的技术设施和运输能力往往不再能满足日益增长的运输量的要求；同时，因时间价值和时间观念的增强，旅客对提高行车速度、节约旅行时间的要求日益增强，加上铁路长期面对其他运输方式的激烈竞争，为谋求铁路自身的进展，客观上需要提高行车速度。而且，由于在长期的运营中，线路的平纵断面线型会产生较大的错动或变形，致使行车速度降低，旅客舒适条件下降。为此，我们有必要对陇海线进行改建来增大陇海线通过能力，提升行车速度等。本次设计主要运用 EXCEL，C 程序设计，CAD 软件等完成陇海线 K1688+800 至K1696+400 段既有线的平面曲线整正和放大纵断面图设计这两部分内容。在平面设计部分，根据既有线拨距资料和轨道资料，结合 EXCEL 计算曲线拨距，运用 C 程序编写寻优半径源代码再次计算拨距，最后对两种方法的计算结果进行比较分析。在纵断面设计中，运用 EXCEL 进行坡段设计，计算轨道起落道量，再根据表格计算结果绘制放大纵断面图。本次设计提交的最终成果主要有：设计说明书、曲线拨距计算表、源代码和放大纵断面图。关键词：既有线改建；平面曲线整正；放大纵断面图 AbstractWith the development of economy and the continuous expansion of foreign trade, both the technical facilities and transport capacity of the railway is often no longer meet the requirements of the growing transport volume;At the same time, due to an enhancement of the value of time and the concept of time, passengers' requirement to raise the speed of train and save travel time is increasingly enhancing, coupled with the fierce competition from other modes of transport the railway have been facing for a long time, to seek the development of the railway itself, objectively need to improve the running speed.Moreover, due to the long-term operation, the line will have a larger displacement or deformation both in longitudinal section and plane , resulting running speed decreased , and passenger comfort conditions lowered.Therefore, we need to rebuild the Longhai line to inc...
