成昆铁路既有桥梁改路基方案研究  

Study on the Scheme of Changing the Existing Bridge of Chengdu-Kunming Railway to Subgrade

作　　者：李井元[1] 丁兆锋 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]中铁磁浮交通投资建设有限公司,武汉430060

出　　处：《高速铁路技术》2017年第5期57-59,共3页High Speed Railway Technology

摘　　要：成昆铁路增建二线在既有西来埝铁路中桥处,受上方眉山市西来埝公路桥孔跨限制,既有线与增建二线线间距控制,以及铁路桥下道路和灌溉渠正常使用等影响,工程方案较难确定。本文对增建二线方案进行了研究,通过技术比选最终确定采用桥改路基方案,即既有线与增建二线一并采用路基的通行方式替代采用桥梁的通行方式,该方案具有充分的可行性和足够的安全性,可供类似工程参考借鉴。It is difficult to determine the pass scheme of the second new railway of the existing Chengdu-Kunming railway at Xilainian bridge. Because the span of the Xilainian highway bridge in Meishan is limited,the distance between the existing line and second line is controlled and the road and irrigation channel under the railway bridge must be used normally. Based on the research on the second new line,the scheme of changing the existing bridge to subgrade is finally selected through comparison and selection of technologies. The existing railway and second railway will be operated together by roadbed instead of bridge. The scheme has sufficient feasibility and security. The research results of this paper can provide reference for similar projects in the future.

关 键 词：既有铁路 桥梁改路基 方案比选 

分 类 号：U445.6[建筑科学—桥梁与隧道工程]