高空超大悬挑混凝土结构模板支撑体系设计.pdf

2016 年 11 月上第 45 卷第 21 期施工技术CONSTUCTION TECHNOLOGY39DOI:10.7672/sgjs2016210039高空超大悬挑混凝土结构模板支撑体系设计与施工关键技术景剑1，王永泉2，郭正兴3(1 河海大学土木与交通学院，江苏南京210098;2 河海大学水利水电学院，江苏南京210098;3 东南大学土木工程学院，江苏南京210096)摘要为解决高空超大悬挑混凝土结构模板支撑体系设计与施工的技术难题，结合已成功实施的多个工程案例，提炼了高空超大悬挑混凝土结构模板支撑体系的判定指标和技术难点，并对其设计与施工过程中的关键技术要点进行了梳理，针对设计提出应重点关注 6 个方面:浇筑期间的钢筋混凝土自重取值;钢桁架的布置方式与结构形式;斜拉杆的选材与设计;模板支撑体系的变形控制;支模架体系选择和设计;高空模板支撑体系的风荷载。针对施工要点，提出应重点解决 6 大难题:预埋件的制作与安装;钢桁架的制作与安装;斜拉杆的制作与安装;支撑架和外作业架的搭设;混凝土浇筑过程中的现场测控;钢桁架的高空拆除。结合具体工程实际案例，对具体设计与施工关键技术进行解读，以期能够为国内外高空超大悬挑混凝土结构支模体系的设计与施工提供技术支持。关键词混凝土;悬挑;模板;支撑;设计;施工 中图分类号TU731.2 文献标识码A 文章编号1002-8498(2016)21-0039-07Design and Key Construction Technology of Formwork Support System forHigh-altitude Ultra-large Span Cantilevered Concrete StructureJing Jian1，Wang Yongquan2，Guo Zhengxing3(1 College of Civil and Transportation Engineering，Hohai University，Nanjing，Jiangsu210098，China;2 College of Water Conservancy and Hydropower Engineering，Hohai University，Nanjing，Jiangsu210098，China;3 School of Civil Engineering，Southeast University，Nanjing，Jiangsu210096，China)Abstract:In order to resolve the design and construction technical problems of formwork support systemfor the high-altitude ultra-large span cantilevered concrete structure，combining with several successfulengineering cases，the judging indices and technical difficulties were refined，and the key points in thedesign and construction process were proposedDuring the design process，six key points are putforward，such as the value of concrete weight during pouring，the layout and structure form of steel truss，the material and design of tension cable，the deformation control of formwork support system，theselection and design of formwork support system，the wind load of high formwork support system Duringthe construction process，six key points are put forward，such as the fabrication and installation ofembedded parts，the fabrication and installation of steel truss，the fabrication and installation of tensioncable，the erection of support frame