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(中國(guó)建筑第八工程局有限公司, 上海 200135)

摘要: 以國(guó)家會(huì)展中心(天津)工程二期項(xiàng)目為背景,13# ~ 16#展廳最后一榀四弦凹形桁架因施工場(chǎng)地受限的影響,無法使用原方案地面拼裝、分段吊裝的施工方法. 為解決此問題,擬選用原位拼裝、逐跨整體提升的施工方案.介紹了施工方案和提升系統(tǒng)設(shè)計(jì),并且采用有限元軟件對(duì)桁架的安裝及卸載過程進(jìn)行模擬分析,得到了提升過程中桁架自身和相關(guān)提升構(gòu)件的應(yīng)力和變形. 分析結(jié)果表明:桁架、提升支架、提升吊具、加固支撐預(yù)埋件的應(yīng)力和變形均處于合理的范圍內(nèi),可以滿足相關(guān)規(guī)范要求,說明在場(chǎng)地受限的條件下,原位拼裝、逐跨整體提升的施工方案可以克服場(chǎng)地困難,滿足施工要求.

關(guān)鍵詞: 國(guó)家會(huì)展中心(天津); 四弦凹形桁架; 原位拼裝; 逐跨整體提升

中圖分類號(hào):TU758. 11 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002?848X(2022)16?0045?05

DOI:10. 19701 / j. jzjg. 20201858

Construction technology on four?string concave truss of National Convention and ExhibitionCenter(Tianjin) project

ZHOU Lei, WANG Junwei, LI Chen, JIA Congliang, ZHANG Jiaxin

(China Construction Eighth Engineering Division Co. , Ltd. , Shanghai 200135, China)

Abstract: Taking the second phase of the National Convention and Exhibition Center (Tianjin) project as the background,the last four?string concave truss of exhibition hall 13#~ 16# cannot be assembled on the ground and hoisted in sections dueto the limited construction site. In order to solve this problem, it was proposed to choose the construction scheme of in?situassembling and overall lifting by span. The construction scheme and lifting system design were introduced, the finiteelement software was used to simulate and analyze the installation and unloading process of the truss, the stress anddeformation of the truss itself and related lifting members were obtained in the process of lifting. The analysis results showthat the stress and deformation of the trusses, lifting supports, lifting spares and embedded reinforcement supports are all ina reasonable range, which can meet the requirements of relevant codes. It indicates that the construction scheme of in?situassembly and overall lifting by span can overcome the site difficulties and meet the construction requirements under thecondition of limited site.

Keywords:National Convention and Exhibition Center ( Tianjin); four?string concave truss; in?situ assembling; overalllifting by span

第一作者:周磊,助理工程師,主要從事建筑鋼結(jié)構(gòu)工程施工工作,Email:1421126189@ qq. com.

[引用本文] 周磊,王俊偉,李晨,等. 國(guó)家會(huì)展中心(天津)工程四弦凹形桁架施工技術(shù)[ J]. 建筑結(jié)構(gòu),2022,52(16):45?49,124. ZHOU Lei, WANG Junwei, LI Chen, et al. Construction technology on four?string concave truss ofNational Convention and Exhibition Center(Tianjin) project[J]. Building Structure,2022,52(16):45?49,124.