大连北站大跨度张弦桁架施工技术  

Construction Technology on a Large-span Truss String Structure in Dalian North Railroad Station

作　　者：王玉生[1] 高良 黄利顺 

机构地区：[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

出　　处：《施工技术》2012年第5期20-22,共3页Construction Technology

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榀桁架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。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.

关 键 词：火车站 钢结构 屋架 张弦桁架 张拉 插板 节点 

分 类 号：TU758.11[建筑科学—建筑技术科学]