广西某超高层超厚筏板基础综合施工技术

Comprehensive Construction Technology for Super Thick Raft Foundation of Super Tall Building in Guangxi

以广西某超高层项目为例,针对超厚筏板基础施工过程中、上部钢筋支撑高度高、自重大,大体积混凝土浇筑体量大且浇筑后水化热产生的内外温差难以控制、一次浇筑困难等工程特点,提出采用型钢支撑作为中、上部钢筋支撑体系,采用全溜槽工艺降低混凝土浇筑难度,通过设置冷却管系统达到控制内部温度、降低内外温差的作用,并采用整体分层连续浇筑工艺保证浇筑过程质量。论文详细阐述了超厚筏板基础整体施工过程中关键施工技术布置方案及施工要点,实践证明,各项技术的应用较好地降低了施工过程难度、保证了施工过程安全与质量,同时加快了基础施工的进度。

Takes a super high-rise project in Guangxi as an example.In view of the engineering characteristics of the super-thick raft foundation construction process,the upper steel support height is high,the self-weight,the mass concrete pouring volume is large,and the internal and external temperature difference generated by the hydration heat after pouring is difficult to control,and the one-time pouring is difficult.The section steel support system is proposed as the upper and middle reinforcement support system,the whole chute process is adopted to reduce the difficulty of concrete pouring,and by setting up the cooling pipe system to control the internal temperature and reduce the effect of the temperature difference between inside and outside,the whole layered continuous casting process is adopted to ensure the quality of casting process.In this paper,the layout scheme of key construction technologies and key points of construction in the whole construction process of super thick raft foundation are described in detail.Practice has proved that the application of various technologies reduces the difficulty of construction process,ensures the safety and quality of construction process,and speeds up the progress of foundation construction.