新型高空悬挑型模板支撑体系设计与施工
2020-03-31陈熙文尤金鹏
陈熙文 尤金鹏



摘 要:本文以颐华城.学府里项目为例,介绍了一种“悬挑型钢主受力、花篮螺杆及钢筋上拉辅助受力”高空悬挑型模板支撑系统,悬挑工字钢固定于边梁或剪力墙上,利用上拉钢筋辅助受力,再在悬挑工字钢上起双排支模架及外架,该技术采用预埋套筒螺栓形式避免普通工字钢穿墙造成的渗漏隐患及减少屋面构架施工周期,并为解决不同结构形式高层对新型工艺的利用保证结构质量、降低施工难度奠定基础。
关键词:悬挑型模板支撑体系 上拉钢筋 花篮螺杆 套筒螺栓
Abstract: Taking Yihuacheng Xuefuli project as an example, this paper introduces a kind of high-altitude cantilever formwork support system of "cantilever section steel main force, basket screw and reinforcement pull-up auxiliary force". The cantilever I-beam is fixed on the side beam or shear wall, and the pull-up reinforcement is used to assist the force, and then the double row formwork support and external frame are erected on the cantilever I-steel. The technology adopts the embedded sleeve bolt form to avoid the common work It also lays a foundation for solving the problem of high-rise buildings with different structural forms, ensuring structural quality and reducing construction difficulty.
Key Words: Cantilever formwork support system; Pull-up reinforcement; Basket screw; Sleeve bolt
湖南省岳阳市平江县颐华城.学府里住宅工程为框架剪力墙结构,建筑面积28.4万m2,由16栋32层住宅组成,层高3m,总高度96.8m;主楼形状为矩形,在屋面女儿墙四周设计有净宽1m跨度的挑檐,其平面、剖面如图1、图2所示。
根据工程情况,全剪外墙采用铝合金模板及附着式升降脚手架挑檐距地高度在96.8m以上,且附着式升降脚手架不具备挑檐施工防护条件,该部分施工基本均采用传统楼板预埋穿4~6m工字钢搭设支模架及外架,浪费工字钢并存在留穿墙孔洞渗漏风险,而且新型花篮螺杆式工字钢目前仅用于悬挑外架。经论证及验算,采用“悬挑型钢主受力、花篮螺杆及钢筋上拉辅助受力”的悬挑型模板支撑体系施工技术,取得良好的经济效益和社会效益。
1 悬挑支模架方案的确定
在32层板预埋螺栓预埋件(外径φ32里面焊接φ20螺母),屋面板施工完成后起16#国标悬挑工字钢钢,在屋面边梁预埋上拉钢筋(直径为18mm)预埋件。……
