我国正在设计修建的特大跨度铁路桥梁及其技术特点

本文介绍我国目前正在设计研究和建设的4座长大跨度重载高速铁路桥梁的结构设计及其技术特点。文章指出,中国高速铁路与世界先进国家相比还有较大的差距,中国的铁路桥梁在跨度和结构类型上也受国家财力的制约远远落后于经济发达国家。中国幅员辽阔,地形条件差异大,过去的铁路线路技术标准也不尽相同;又加之中国铁路活荷载及高速铁路活荷载有别于世界其它国家的铁路活载标准。因此,中国工程师必须在借鉴国外先进技术的同时,探索设计适合中国铁路实际情况的大跨度桥梁。

Super Long Span Railway Bridges under Design and Construction in China and Their Technical Characteristics

The introductions are given in this paper to structure designs and their technical characteristics of four long span bridges under design and construction for heavy-haul and high-speed railway.It is pointed out that compared with the developed countries,the high-speed railway in China has large gaps and the railway bridge in China is far backward in span and structure type because of the limitation of financial resource.The previous technical standards of railway track are various due to the vast territory and big differences of landform conditions in China.In addition,the live loads of railway and high-speed railway are different than those of other countries,so it is necessary to seek and design the suitable long span bridge for the railway condition in China based on learning the advanced technologies of foreign countries.