津保铁路矮塔斜拉桥设计关键技术研究  

Research of Key Technology in Design of Extradosed Cable-stayed Bridge on Tianjin-Baoding Railway

作　　者：张海[1] 吴大宏[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300142

出　　处：《铁道标准设计》2013年第11期55-58,共4页Railway Standard Design

摘　　要：以津保铁路矮塔斜拉桥为背景,着重对关键技术:纵向钢束的布置、支座布置方案、塔上锚固方案、索梁锚固区及墩底局部效应进行分析。通过研究得到以下结论:该矮塔斜拉桥满足铁路运行安全要求;两支座体系有效的发挥了支座的作用,适用于该桥的设计;索鞍分丝管技术更适用于斜拉桥;根据局部分析提出索梁锚固区及墩底镂空段的局部加强措施。Taking the extradosed cable-stayed bridge on Tianjin-Baoding Railway as the example, this paper analyzed emphatically the key technologies, including the arrangement of longitudinal prestressed steel tendons, the arrangement of bearings, the scheme of anchorage on the pylon, the anchorage zone of the cable beam, the local effect at pier bottom. The research draws the conclusion as below： this extradosed cable-stayed bridge can meet the requirement of railway operation safety; the two-bearing system can effectively play the role of bearing, and can be suitable for this bridge ; the technology of cable saddle with steel tubes is more suitable for cable-stayed bridge. Finally, based on local analysis, the local strengthening measures for the cable beam anchorage zone and for the hollow zone at pier bottom were put forward.

关 键 词：·铁路桥 矮塔斜拉桥 静力分析 细部分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]