Research on Comprehensive Construction Technology of Sliding Scaffolding with Circular Tube Supports for Grid Shell Structures

Sliding scaffolding has been widely used in grid shell structures with long spans and long lengths， such as airport piers， train stations， and exhibition centers， due to its advantages of convenient operation and good comprehensive economy. To address the defects and dificiencies of conventional sliding scaffolding， the following key construction technologies have been developed and summarized through targeted research and upgrades： 1） The construction technology of sliding scaffolding with supports has been introduced. By adopting methods such as alternating block sliding with internal circular tube supports or parallel sliding with external circular tube supports， the upper assembled grid shell structure is maintained in a multi-point supported state throughout the process. This method reduces vertical deformation and cumulative assembly errors of the grid shell structure during construction， thereby mitigating adverse effects on the structural performance. 2） A construction method for arc-shaped sliding of scaffolding has been proposed， enabling the application of sliding scaffolding in the installation of grid shell structures arranged in an arc shape and expanding the scope of sliding scaffolding in grid shell structure installation. 3） A temporary reinforcement method for circular tubes has been introduced. It enhances the bearing capacity of the rod by using steel profiles to install an outer sleeve， which increases the rod's turning radius， reduces its slenderness ratio， and thus improves its stability coefficient. These reinforcement methods offer the advantages of a simple process， convenient material selection， ease of implementation， and reusability.