既有线提速小半径曲线平面改造方法研究

为了满足铁路运能增加和现代经济快速发展的需求，新建铁路的同时对既有线铁路的提速改造也是非常必要的，而平面改造中小半径曲线已成为既有线提速的一个瓶颈问题。以“哈尔滨至漠河铁路扩能改造工程”加格达奇至塔河段的方案研究为例，讨论了关于既有线提速改造的设计原则及思路；结合该区段工程的设计改造过程，根据铁路的平面既有现状及特点，重点介绍了平面改造中小半径曲线的改造方法。结果表明：改造完成后的铁路平面条件能很好地满足该区段的提速要求，取得了良好的效果，为今后既有铁路提速改造提供了一定的参考。

Study on Plane Transformation of Small Radius Curve for Existing Railway Speed-raising

To meet the increased railway transportation capacity and the needs of rapid modern economic development,in addition to building some new railways,the transformation of the existing railways speed-raising is also necessary.The plane transformation of medium and small radius curves has become one of the bottlenecks in the speed-raising of existing lines.Taking the research program of Jiagedaqi to Tahe section in Harbin to Mohe Railway Reconstruction Projectas an example,this article discusses the design prin...