Research on Temporary Support-Free Reverse Construction Technology for Super High-Rise Inclined Suspension Structures
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摘要: 超高层倾斜悬挂结构作为一种较新颖的结构形式,可根据建筑功能和外观要求,灵活调整倾斜角度和悬挂方式。但其施工过程复杂,施工难度较大。为此,以三一重工华南总部项目为例,通过不同施工方案比选,提出了一种新型超高层倾斜悬挂结构施工方法——无支撑逆向施工法。首先进行外框斜柱和节点层结构安装,然后吊装吊挂柱,并采用倒链等措施临时固定其倾斜位置,再由下往上安装悬挂层结构,以实现无支撑安装。与常规的临时支撑顺向施工法和临时支撑逆向施工法相比,该方法虽技术难度相对较高,但无需搭设临时支撑,安全、造价和工期等均具优势。在此基础上,对该方法的施工过程进行模拟分析,以保证施工安全可靠,并为同类工程的施工提供参考。Abstract: As a relatively novel structural form, the super high-rise inclined suspension structure can flexiblly adjust the inclination angle and suspension method according to the requirements of building functions and appearance. However, its construction process is complex and poses significant challenges. Taking the South China headquarters project of Sany Heavy Industry Co. , Ltd. as an example, a novel construction method known as the temporary support-free reverse construction method is proposed for super high-rise inclined suspension structure through the comparison and selection of different construction schemes. This method involves first installation the inclined columns of the outer frame and the joint layer structure, then lifting the hanging columns and temporarily fixing it in its inclined position using measures such as chain blocks. next, the suspension layer structure is installed from the bottom to top to achieve temporary support-free installation. Compared with the conventional approaches, namely the temporary-supported sequential construction method and the temporary-supported reverse construction method, although this method has relatively high technical difficulty, it does not require the temporary supports, and has advantages in safety, cost and construction period. On this basis, the construction process of the proposed method was simulated and analyzed to ensure the construction safety and reliability, providing a reference for the construction of similar projects.
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