装配式框架结构中预制梁叠合层预制保护层免高空支模施工技术

Construction Technology of Prefabricated Protective Layer for Prefabricated Beam Stacked Layers in Assembled Frame Structures without Overhead Supporting Moulds

装配式建筑中预制梁安装通常会存在叠合层上部钢筋碰撞的问题,同时由于预制梁与预制板叠合层交接位置需支设侧模封闭,常常造成工期延误,高空支模施工也增大了安全风险以及施工成本。为解决装配式框架结构中预制梁叠合层上部钢筋碰撞以及侧模难封闭等问题,本文以D市QZ项目为例,基于文献调研和实际项目研究,提出了一种预制梁叠合层预制保护层免高空支模施工技术,解决后期封闭预制梁叠合层与预制板交接位置在现场高空支模的难题,同时缩短了安装预制梁后节点处理钢筋错位碰撞的时间。该方法不仅节约了施工工期和成本,同时提高了整个施工工程的安全性,以期为相应装配式工程项目提供参考借鉴。

Prefabricated beams in assembly buildings usually have the problem of collision of the upper reinforcement of the stacked layer,and at the same time,because the prefabricated beams and prefabricated panels need to be supported at the location of the stacked layer to be closed by side moulds,which often causes delays in the construction period,and the construction of overhead moulds increases the safety risk and the construction cost.In order to solve the problems of collision of upper reinforcement of prefabricated beams and difficult closure of side moulds in assembled frame structure,this article takes the QZ project in D city as an example,based on literature research and actual project research,proposes a construction technology for prefabricated beam composite layer prefabricated protective layer without high-altitude formwork support,which solves the problem of high-altitude formwork support at the junction of the closed prefabricated beam composite layer and the prefabricated slab on site in the later stage.At the same time,it shortens the time for node treatment of steel bar misalignment and collision after installing the prefabricated beam.It also saves the construction period and cost,and improves the safety of the whole construction project,in order to provide reference for similar assembly projects.