现浇钢筋混凝土无梁空心楼盖抗浮施工技术研究  

Research on Anti-Floating Construction Technology of Cast-in-Place Reinforced Concrete Beamless Hollow Core Building Cover

作　　者：陈仲武 CHEN Zhongwu(China Railway 20th Bureau Group Municipal Engineering Co.Ltd.,Lanzhou Gansu 730000,China)

机构地区：[1]中铁二十局集团市政工程有限公司,甘肃兰州730000

出　　处：《铁道建筑技术》2024年第10期180-183,共4页Railway Construction Technology

基　　金：中铁二十局集团有限公司科技研发项目(YF202217)。

摘　　要：现浇混凝土无梁空心楼盖结构采用填充模盒,由于填充模盒质量较轻,施工过程易出现上浮现象,采用普通施工方案难以有效控制上浮。以衡水第一中学兰州分校新校区项目为例,提出锚固互锁体系控制填充模盒上浮处置方案:在模盒上用两根钢筋十字交叉压住模盒,交叉点位于模盒平面正中的圆孔部位,用铁丝通过圆孔将压筋拉结在底模的下背楞上,充分利用压筋的压力和铁丝的拉结力平衡混凝土浇筑过程中产生的浮力,形成锚固互锁体系。经现场监测验证,采集10个监测单元数据,最大上浮高差7 mm,全部满足规范要求。施工完成后,进行质量检查验收,连续跨内所有模盒标高全部验收合格,说明锚固互锁体系控制填充模盒上浮方案可行。Cast-in-place concrete beamless hollow floor cover structure using filler mold boxes,due to the filler mold box quality is light,floating phenomenon is prone to occur during the construction process,using ordinary construction program is difficult to effectively control the floating.For this reason,this paper takes the new campus project of Hengshui First Middle School Lanzhou Branch as an example,and proposes the anchoring interlocking system to control the uplift of the infill mold box disposal program:two steel bars are pressed onto the mold box in a cross shape,with the cross point located in the middle of the mold box plane holes.The wire is used to tie the pressure bar through the hole to the back flute of the bottom mold,and the pressure of the pressure bar and the tensile force of wire are fully utilized to balance the buoyancy generated in the process of concrete pouring to form an anchoring interlocking system.After on-site monitoring and verification,10 monitoring units were collected,and the maximum uplift height difference was 7 mm,all of which met the specification requirements.After the completion of construction,quality inspection and acceptance are conducted,and all the elevations of all the mold boxes in the continuous span are accepted,indicating that the anchorage interlocking system to control the uplift of the filled mold boxes is feasible.

关 键 词：无梁空心楼盖 填充模盒 抗浮控制 锚固互锁体系 

分 类 号：TU745.9[建筑科学—建筑技术科学]