既有线提速小半径曲线平面改造方法研究

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

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。

To meet the increased railway transportation capacity and the needs of rapid modem economic de- velopment, 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 Project＂ as an example, this article discusses the design principles and ideas for transfor- mation of existing railway line. In combination with the engineering design process of this transformation project, according to the status quo of the existing railway and the characteristics of the plane, the discussion is focused on the reconstruction methods of small radius curve in plane transform. When the transformation is completed, the results show that the railway plane conditions can satisfy the speed-increase requirements of the Jiagedaqi to Tahe railway section, and achieves good results, which may provide reference for the speed-raising transforma- tion of the existing railway in the future.