L68B2 Mast SectionRisk Factors and Control of Metal Structure Connections and Upwelling Process of Tower Suspension
Tower crane is a large mechanical equipment, its operational safety can not be underestimated. The current tower hoists are mostly fixed models, and they are frequently demolished. There are many sources of danger in the installation and demolition of Tower hoists, such as foundation, installation site, and large lifting, etc.. All parts of the installation process must be strictly follow the operating rules. operation. This paper focuses on the control of the metal structure connection and the risk source of the lifting process.
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Metal structural connection of the tower crane
There are usually two ways to connect the metal structure of the tower crane, namely high-strength bolt connection and pin shaft connection. The high strength bolt connection of the tower crane is based on friction to transfer the internal force of the structure. The connection surface is required to be clean and has a high friction coefficient. The tightening moment value is very important, especially the pre-tightening moment. The purpose of pre-tightening is to enhance the reliability and tightness of the connection to prevent gaps or relative slippage in the connection after loading to ensure the final installation quality. The following should be noted in the installation of high-strength bolts:
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