国家会议中心二期展览区大跨度转换桁架卸载技术  

LARGE-SPAN TRANSFER TRUSS UNLOADING TECHNIQUE IN CHINA NATIONAL CONFERENCE CENTER PHASE Ⅱ

作　　者：王小瑞 付小敏 谢永伟 赵瑞林 WANG Xiao-rui;FU Xiao-min;XIE Yong-wei;ZHAO Rui-lin(Beijing No.3 Construction Engineering Co.,Ltd,100044,Beijing,China;Bejing Mechanized Construction Group Co.,Ltd,100045,Beijing,China)

机构地区：[1]北京市第三建筑工程有限公司,北京100044 [2]北京市机械施工集团有限责任公司,北京100045

出　　处：《建筑技术》2021年第5期560-563,共4页Architecture Technology

摘　　要：国家会议中心二期展览区转换桁架是目前国内规模最大的转换桁架体系,也是国内首次带桁架层混凝土和上部结构同时卸载的转换桁架结构。卸载施工中,针对转换桁架卸载重量重、面积大、点位多等特点,采用砂箱排砂的方式进行分区分级卸载。经施工模拟、施工监测和对比分析,卸载过程中结构的位移、应力等理论值与实测值吻合良好,证明该卸载方案切实可行。The transfer truss project in the exhibition area of China National Conference Center phase Ⅱ is the largest transfer truss system in China and it is also the first transfer truss structure that truss concrete and upper structure were unloaded simultaneously.During the unloading construction,considering the characteristics of the transfer truss,such as big weight,big volume and multiple construction points,etc.,sand box discharge method was used for divided and segmented unloading.After construction simulation,construction supervision and comparative analysis,the structural displacement and stress condition during unloading complied with the measured values.It proved that this unloading method is feasible.

关 键 词：转换桁架 砂箱 分级卸载 施工监测 

分 类 号：TU74[建筑科学—建筑技术科学]