铁路提速既有线简支梁桥加固问题研究

On How to Consolidate Simple-supported Railway Bridges of the Existing Railway to Adapt to Train Acceleration

通过对目前我国铁路既有线简支梁桥在铁路提速中出现的主要问题及其原因进行分析,发现主要是由简支梁桥横向刚度不足所致,并对目前简支梁桥的加固方法进行了介绍;在此基础上对今后我国高速铁路建设中简支梁桥的截面形式和结构型式提出了一些建议,有益于今后高速铁路桥梁建设。

After analyzing the main problems of the simple-supported railway bridges of the existing railway occurring after train acceleration, as well as the causes leading to them, the paper finds out that most of the problems result from the deficiency of the transverse rigidity of the simple-supported railway bridges, on the basis of which some of the present consolidating methods are introduced in the paper, with some forms of the cross-sections of the simple-supported railway bridge girders, and types of structure for express railways in our country suggested, which may be useful for the construction of express railways in the future.