102
DOI:10.7672/sgjs2015140102
施工技术
CONSTRUCTION TECHNOLOGY
2015年7月下第44卷第14期
苏州国际金融中心地下室外框柱安装技术*
花书汶，唐忠靖，方振亚，姜成昆，童斯超，钱俊
（中建钢构江苏有限公司，江苏靖江214532）
【摘要】随着超高层建筑高度不断提升，其地下室结构也越来越复杂，带来超大质量钢构件难吊装和厚板焊接难度较大等问题。并因超高层建筑大多临近地铁，对基坑支护要求非常严格，导致基坑支护及栈桥覆盖大面积地下室。通过对基坑支护及栈桥与地下室外框柱的影响关系及厚板焊接变形规律进行分析，采用合理而科学的吊装和焊接
技术顺利完成了地下室外框柱的施工，确保了良好的施工质量。【关键词］地下工程；地下室：支护：栈桥；外框柱；吊装：焊接
［中图分类号］TU758.1
【文献标识码］A
[文章编号】1002-8498(2015)14-0102-03
TheInstallationTechnologyofOuterFrameColumnsinthe
BasementofSuzhouInternationalFinancialCentre
Hua Shuwen,Tang Zhongjing,Fang Zhenya,Jiang Chengkun,Tong Sichao, Qian Jun
(China Construction Steel Structure Jiangsu Co. , Lid. , Jingjiang, Jiangsu 214532, China)
Abstract : With the rising height of super tall buildings, basement structures are more and more complex, which bring difficult issues such as hard hoisting for large weight steel components and hard welding for thick plate steels. And as most of super tall buildings are near subways, foundation excavation supports are very strictly required, which leads foundation excavation supports and trestles to cover a large area in the basement.By analyzing the relationship of foundation excavation supports and trestles and outer frame columns in the basement, as well as the deformation rule of welding for thick plate steels, reasonable and scientific hoisting and welding technology is used to complete the construction of outer frame columns in the basement successfully, ensuring good quality of the construction.
Key words: underground; basement; supports; trestle; outer frame column; hoists; welding
1工程概况
苏州国际金融中心工程位于苏州市工业园区 271号地块，建筑高度450m。本工程地下5层，底
板标高-22.650m，塔式起重机为TC7052。
地下室外框柱分布在主楼B5~B1层，翼缘板厚70mm，腹板厚40mm，共3种截面类型，分别为十字柱、王字柱、品字柱。外框柱竖向共分为5节，每节平面内共17根，单根最大质量32.8t.最大分段高度5.4m
外框柱单体质量大，其中部分吊装受基坑支护及栈桥阻挡影响，吊装是其中难点；板厚大导致焊接热输人大，变形是质量控制要点。外框柱分布如图1所示。
*“十二五"国家科技支撑计划（2011BAJ09B00）
【作者简介］花书汶，助理工程师，E-mail：119282614@qq-com[收稿日期］2014-07-25；［修订日期】2014-11-29
装式起重机TC7052.臂长50m
图1地下室外框柱平面布置
Fig.1Plan of the basement frame column
2地脚螺栓施工
地脚螺栓施工防止阻挡土建钢筋绑扎，放弃制作支架进行预埋这一常规措施，采用双层限位板点焊在钢筋支撑架上进行预埋，并加斜撑防止定位板移动。此施工方法既不影响土建钢筋绑扎，又抢先