施工技术 2012年5月上 20 CONSTRUCTION TECHNOLOGY 第41卷第364期 大连北站大跨度张弦桁架施工技术 王玉生，高良2，黄利顺2 《1.中铁建工集团有限公司北京分公司，北京100070；2.浙江精工钢结构有限公司，浙江绍兴312030) [摘要]大连北站屋架主体为跨度72m的预应力张弦桁架结构，主桁架间距为21.5~28.45m.由于桁架跨度及间 距均较大，张拉过程中容易出现整体稳定性差及结构构件横向失稳现象.通过合理的张拉施工工艺有效地保证了 单福桁架3根拉索张拉同步性，同时采用特殊的插板节点处理以及合理的张拉施工顺序，很好地解决了预应力张 拉施工过程中的一些难点问题. [关键词]火车站；钢结构；屋架：张弦桁架；张拉；插板；节点 [中图分类号]TU758.11 [文献标识码]A [文章编号]1002-8498(2012)09-0020-03 Construction Technology on a Large-span Truss String Structure in Dalian North Railroad Station Wang Yusheng' Gao Liang Huang Lishun2 (1.Beijing Branch China Railway Construction Engineering Group Beijing 100070 China; 2.Zhejiang Jinggong Steel Building Co.Ld.Shaoxing.Zhejiang 312030 China) Abstract:The roof of Dalian North Railroad Station is a 72m-span prestressed truss string structure whose distance is about 21.5m to 28.45m.Because of large span and distance of main trusses so their. whole stability is poor during tensioning.By using reasonable tensioning construction process the stretching synchronism of the three cables in one truss is effectively ensured.Meanwhile some difficulties during the prestressed tensioning construction are well resolved by application of special plug plate connections and rational stretch-draw construction sequences. Key words:railroad stations;steel structures;roofs;truss string structures;tension;plug-plate;joints 1工程概况 大连火车北站位于哈大线终点，地处辽东半岛 南端的辽宁省大连市，是连接海陆空运输的枢纽 (见图1).该站房屋架主体为预应力钢结构张弦桁 架结构(-⑤轴)，张弦主桁架跨度为72m 主桁 图1大连北站 架间距为21.5-28.450m 共9福.由于主桁架间 Fig.1 Dalian...
大连北站大跨度张弦桁架施工技术.pdf
