English：

The public construction project of the media port of the “Belt and Road Initiative” culturalexchange center can be divided into two parts: north and south. The north side is the main body, and thesteel structure frame⁃support structure is adopted. The south side is the overall cantilever structure,which is 37. 5m long and is a large⁃span cantilever steel structure. It is difficult to construct; therefore,the steel structure assembly is completed by using the method of bracket support⁃high altitude in⁃situdocking. Meanwhile, the construction layout problem of the temporary support system was solved bystrictly controlling the construction technology and installation sequence of the steel structure andanalyzing the numerical simulation of the whole construction process. The strength, deformation, andstability of the temporary support system under different complex working conditions, and the overallstress and deformation of the steel structure, have been checked to ensure the accuracy and safety of theinstallation and unloading of the large⁃span cantilever steel structure.