刘茂林

【摘 要】随着建筑业的发展，各种各样的脚手架应运而生，而悬挑脚手架以其搭设简便，安全可靠，成本低廉等优点被广泛应用于高层或多层建筑外架。常规的悬挑脚手架搭设是先安装悬挑钢梁，再搭设架体，此方法暂时缺失外架防护，工人在作业层施工时存在安全隐患，造成施工技术间断而影响工期。现有的施工方法无法满足施工安全防护和施工进度的需求。采用更上一层楼法是利用悬挑架下层末端立杆作为支撑，架空预搭上一层悬挑架体第一步架做防护架。预埋锚固环和安装固定悬挑钢梁，然后逐根将预搭架体立杆放松到挑梁上，最后依次往上搭设架体能确保悬挑层不缺失安全防护减少悬挑架搭设对施工进度的影响。

【关键词】预搭;悬挑架;后装

Construction technology of cantilever frame installed after pre-collecting the protective frame

Liu Mao-lin

（Guangcheng Construction Group Co.， Ltd Wenzhou Zhejiang 325000）

【Abstract】With the development of the construction industry， various scaffoldings have emerged， and the overhanging scaffolds are widely used in high-rise or multi-storey building frames because of their simple construction， safety and reliability， and low cost. The conventional cantilever scaffolding is to install the cantilevered steel beam and then set up the frame. This method temporarily lacks the outer frame protection. Workers have safety hazards during the construction of the working layer， resulting in intermittent construction technology and affecting the construction period. Existing construction methods cannot meet the requirements of construction safety protection and construction progress. The upper level method is to use the lower end of the cantilever frame as the support， and the first step of the overhead suspension frame is used as the protection frame. Pre-embed anchor ring and install fixed cantilever steel beam， then relax the pre-frame body pole to the pick-up beam one by one， and finally set up the frame body in turn to ensure that the cantilever layer does not lack safety protection and reduce the overhanging frame erection The impact of the schedule.

【Key words】Pre-patch;Cantilever;Post-loading

1. 工程概況

温州银行瓯海大楼建设工程，位于温州市瓯海区商汇路与娄东大街交叉口西北侧，地理位置十分优越。总建筑面积36497m2（含地下室8957m2），地上24层，地下2层。综合考虑了以往的施工经验，决定郡房1-4层采用普通落地脚手架，搭设高度为21.6m，5层楼板面开始采用16#工字钢悬挑脚手架，每3层（12m）为一挑，共8挑（5F、8F、11F、14F、17F、20F、23F）。悬挑脚手架搭设时缺失外架防护，存在安全隐患，本工程利用挑架下层末端立杆作为支撑，架空预搭上一层悬挑架体第一步架做防护架。

2. 工艺流程及施工要点

2.1 施工工艺流程（施工工艺流程见图1）。

2.2 操作要点。

2.2.1 施工准备。

（1）熟悉施工图、 编制悬挑脚手架体专项施工方案。使用BIM建模明确悬挑架体的层数和悬挑层钢梁的平面布置（悬挑层钢梁的平面布置见图2）。……