浅谈京广线郑州至武汉间提速消除限速区段的必要性

研究目的：京广线作为我国南北运输的主要通道，在客货运输中起着国民经济大动脉作用，而位于京广线中段的郑州至武汉间铁路在路网中的作用更是举足轻重。消除郑州至武汉间仅存的两个限速区段，提高郑武全段乃至京广全线的通过能力及客货列车运行速度，进一步适应客货运输的发展需求，提高铁路在运输市场的竞争力。 研究方法：通过分析郑州至武汉间铁路历经6次大提速改造之后仍然存在的主要薄弱环节：运输能力紧张，运输数量不能适应发展需求及运行速度偏低，运输质量不能满足市场需求等，论证消除限速区段的必要性；通过对两个限速区段改造方案的研究，论证消除限速区段的可行性。 研究结果：消除郑州至武汉间孟庙——人和站南及长台关——陈家河间两个限速区段技术上是可行的，经济上是合理的。 研究结论：消除孟庙——人和站南限速区段对长台关——陈家河段同时实施落坡及提速改线工程，既能满足郑州至武汉间全段客车提速的要求，也能适应既有线未来大量货物列车的运输需求，宜尽早实施。

DISCUSS ON THE NECESSITY OF ELIMINATING VELOCITY RESTRICT SEGMENTS FOR SPEED -UP IN ZHENGZHOU-WUHAN RAILWAY

Research purpose: As a national North-South main transportation line, Jing-Guang railway performs the national economic artery function in the transport of both passengers and goods, and it's central part-Zhengzhou to Wuhan-counts a lot in the national railway networks. The velocity and the passing ability of trains running between Zhengzhou and Wuhan section, and even all of the Jing-Guang railway, can be enhanced by means of eliminating only two remained velocity restrict segments in this section, to make railway more suitable to developments of both passengers and goods transport, and to uplift the railway's competing power in national transport ion markets. Research method: By analyzing still existing weaknesses after six large scale speed-up reconstructions of Zhengzhou-Wuhan section of Jing-Guang railway, such as inadequacy of the transport ability and lower train velocity, inappropriate transport quantity for developments and quality for the national economic markets, necessities of eliminating the only two remained velocity restrict segments are demonstrated. And through research into two engineering plans of reconstruction, the feasibilities of eliminating those two remained velocity restrict segments are discussed. Research results: With above analysis, the paper eliminates the two remained velocity restrict segments, from Menmiao to south of Renhe and Changtaiguan to Chenjiahe. And it is feasible in technologies and reasonable in economies. Research conclusion: Eliminating velocity restrict segments from Menmiao to south of Renhe and Changtaiguan to Chenjiahe, at the same time sloping down the gradient, can not only satisfy the requirements of passenger trains speed-up between Zhengzhou and Wuhan, but also suit a huge future goods transport demand for existent railways, so elimination of these two velocity restrict segments is the sooner the better.