Construction Technology and Joint Structure Optimization of Outward-Inclined Glass Curtain Walls

The structural form of public buildings such as large exhibition halls is unique， posing high requirements for glass curtain wall construction technology. The glass curtain wall of an elliptical inverted cone exhibition hall features large inclination angles， high installation heights， and large single-piece glass sizes. During the construction process， due to the characteristics of the glass curtain wall and limited installation space， there are difficulties such as the inability to use large machinery for vertical lifting of the glass curtain wall and the difficulty in positioning the outward-inclined glass during installation. Based on the characteristics of the outward-inclined curtain wall project of the first phase of Jinfeng City Center， in terms of lifting construction， a method was adopted where I-beams were welded onto structural steel trusses as sliding tracks， coupled with pulley blocks and electric hoists for glass curtain wall installation. This method allows for flexible movement of the glass in both vertical and horizontal directions during lifting， effectively solving the problem of the inability to directly lift the outward-inclined curtain wall. In terms of optimization design， the installation joints at the bottom of the glass were optimized by changing the fixed steel channels to adjustable steel channels， facilitating the lifting and positioning of glass. The installation joints on the side of the outward-inclined curtain wall were optimized by adding temporary aluminum alloy fixings， optimizing the connectors at the connection between the aluminum alloy pressure block and the joist， simplifying the form of the connectors， ensuring that the glass does not deform or self-explode without the aluminum alloy pressure block installed， without affecting the subsequent installation of the aluminum alloy pressure block， reducing the risk of damage to the outward-inclined glass， and facilitating glass installation.