Abstract：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 its 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.
2006, Vol. 23 
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