Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
Steel structure building, many are some large span of the project, because the construction of this project is more difficult and complex, in the design of the time need to be combined with the actual construction to deal with, but in the installation of the installation may be some error with the design, so the large span of the construction project should be how to control the installation accuracy it.
Generally speaking, large-span buildings have higher requirements on the installation sequence, and if the installation sequence is not reasonably considered, then the steel components can not meet the needs of lifting, which may have a certain impact on the stability of the structure. When organizing the construction design, the correct installation sequence needs to be reasonably arranged, and the work needs to be unified and coordinated in factory processing, component transportation, on-site installation, etc., and it also needs to be strictly enforced during the construction process. In addition to the need to carefully formulate the installation sequence suitable for the project, but also to choose the regular construction team for installation, to avoid hidden dangers in the subsequent installation.
When lifting large-span steel beams, if the lifting points are not calculated correctly and the traditional two-point lifting is chosen, the steel beams and cables will be subjected to a large axial force due to the longer steel structure, the larger spacing of lifting points, as well as factors such as self-weight and variable load, and the steel beams and cables will be subjected to a large axial force, and it will be relatively easy to have lateral bending of steel beams and may even be seriously deformed.
Because the large-span building has the characteristics of large total tonnage of unloading, large workload of unloading calculation and analysis, wide distribution of unloading points, and large single-point unloading force, if the support force release is not reasonable, then it will destroy the structure of the building. Therefore, when unloading, it is generally based on the basic principle of system conversion program, structural calculation and analysis as the theoretical basis, deformation coordination as the core, real-time monitoring as the basic guarantee, and unloading strictly in accordance with the requirements of the two correct unloading methods, namely isometric method and equidistant method.
