施工技术 2015年10月下 90 CONSTRUCTIONTECHNOLOGY 第44卷第20期 DOI:10. 7672/sgjs2015200090 大跨非预应力弦索桁架结构安装工艺 张艳芳',孙长安” (1.山西建筑职业技术学院工程管理系,山西大原030006;2.中建城市建设发展有限公司,北京100037) 【摘要】预应力张弦桁架结构因其结构自重轻、承载力大的特点,在国内大跨度厂房等建筑中应用越来越广泛,但 是因其在施工时,钢索张拉需要工序较多,对工期和造价产生较大影响。
主要介绍非预应力弦索桁架结构,其采用 的优点,还降低了现场的施工难度、简化了施工工序还有效降低了施工造价,笔者针对此种结构的加工与安装工艺 予以研究探讨,并以巨力索具厂房结构施工为例进行深人分析。
[关键词]钢结构;非预应力;弦索结构;安装 [中围分类号】TU758 【文献标识码]A [文章编号]1002-8498(2015)20-0090-03 TheInstallationProcess of Large Span Non-prestressed String Truss Structure ZhangYanfang',Sun Chang'an (1.Department of Engineering Management, Shanxi Architetural College,Taiyuan,Shanxi 030006,China; 2.CSCEC City Construction Development Co.,Lud.,Bejing 100037,China) Abstract:Because of its structure characteristics of light weight and large bearing capacity of prestressed string truss structure,it is widely used in large span structure. But because of the many tensioning process during steel cable construction,it has great influence on the construction period and cost. This paper mainly introduces the non-prestressed string truss structure,which applies rigid connection of both ends and the hinge connection in the middle of the structure, and a piece of string (steel bar) at the steel truss structure that is beautiful and light,also reduces degree of dificulty of the site construction and makes the construction process simply and reduces the construction cost effectively. This paper discusses the processing and installation technology of this kind of structure,and takes a cable factory construction for example. Key words:steel structures; non-prestressed; string truss structure; installation 1工程概况 2安装方案对比 非预应力张弦桁架结构采用两端刚接、中间铰 1)高空散拼法在钢拱下部搭设满堂红脚手 接与下部不需要施加预应力的钢棒进行联合受力。
架,将钢桁架分为若干单元节在地面制作,高空拼 巨力索具车间长80.5m,宽80m,柱距16m,分接。
由于桁架带有倾角,且中间节点为铰接,高空 别由四边形桁架柱、桁架梁组成,桁架柱与桁架梁拼接难度大,安全质量不易保证。
周转材料消耗占 之间为刚接节点,析架跨度80.5m,桁架下弦底标高 用多,施工工期长,高空作业期长。
为20.000m,桁架之间通过次桁架连接形成整体。
2)整体吊装法地面整体制作、整体吊装一次 该桁架柱质量为17t,桁架梁质量为35t,桁架就位。
减少了高空作业,施工质量易保证;工期较 总重324t,如图1所示。
连接节点构造如图2...