受限空间下双层阶梯式钢结构桁架倒序安装技术  

Reverse Installation Technology of Double-layer Stepped Steel Truss in Confined Space

作　　者：梅许江 张玉建 梁丰韬 余少乐 别军皓 邹坤 朱荣珅 MEI Xujiang;ZHANG Yujian;LIANG Fengtao;YU Shaoe;BIE Junhao;ZOU Kun;ZHU Rongshen(Hangzhou Center For Health Development,Hangzhou 310001,Zhejiang,China;China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200120,China)

机构地区：[1]杭州市卫生健康事业发展中心,浙江杭州310001 [2]中国建筑第八工程局有限公司,上海200120

出　　处：《建筑施工》2023年第12期2433-2436,共4页Building Construction

基　　金：上海市科学技术委员会启明星计划(21QB1406400);中国博士后科学基金(2022T150612)。

摘　　要：宁波国际会议中心双层钢结构位于地下室底板上空的建筑内部,大型设备不能进入,且结构断面呈现倒阶梯形,常规施工方法不能满足要求。结合现场实际条件,提出了“不等跨部分高空散装、等跨部分二次整体提升”多方式组合安装倒序施工方法。同时,对支撑钢格构柱、提升支架、混凝土楼板加固等进行了受力分析与施工过程模拟,验证了倒序安装技术的安全性与可行性。工程实践表明,该施工方法高效可靠,可为类似工程提供参考。The double-layer steel structure of the Ningbo International Convention Center is located inside the building above the basement floor,where large equipment cannot enter and the structural section presents an inverted staircase shape,making conventional construction methods unable to meet the requirements.Combining with the actual conditions on site,a multi-mode combined installation and reverse construction method of"unequal span parts in high-altitude bulk,equal span parts in secondary overall lifting"is proposed.At the same time,the stress analysis and construction process simulation of supporting steel lattice columns,lifting brackets,concrete floor reinforcement,etc.are carried out to verify the safety and feasibility of the reverse installation technology.Engineering practice shows that this construction method is efficient and reliable,and can provide reference for similar projects.

关 键 词：楼板加固 二次整体提升 倒序安装 多方式组合安装 

分 类 号：TU755[建筑科学—建筑技术科学]