Analysis of key points of steel structure planning and construction

Device precision control: messy space steel structure should be measured and controlled in the installation, because steel structure construction measurement control as a part of the construction skills, the rationality and advanced nature of the project construction plan, from a lot of measurement and control data information analysis results and get reaction and proof. About the large-span steel structure, because in the construction process, the deformation and stress state of the structure and after forming are very different, so the need to use the total support tire frame to ensure the accuracy of the structure.

Disassembly control: because the large-span steel structure has the characteristics of large total tonnage of unloading, wide distribution of unloading points, large single-point unloading force, large amount of unloading accounting analysis and operation, if the release of supporting force is unreasonable, it will damage the structure or make the scaffolding gradually unstable. Therefore, the unloading of steel structure in Fujian must take the system conversion plan as the principle, the structural accounting analysis as the basis, the structure safety as the main purpose, the deformation coordination as the center, the real-time monitoring as the guarantee, in strict accordance with the equiratio method and equidistance method of unloading requirements.

Hoisting plan: When hoisting large-span steel beams, if reasonable lifting point calculation is not carried out, the traditional two-point hoisting is still selected. Because the steel beam structure is long, the distance of lifting point is large, and the self-weight and variable load action and other factors, the steel beam and cable are subjected to great axial force, which is easy to present the lateral zigzgle of the steel beam, and even more severe deformation. The construction site of long-span steel structure should strengthen the management, add the professional knowledge training of workers, so that they have a more concrete understanding of the mechanical characteristics of components and hoisting knowledge. Strengthen construction organization planning to carry on reasonable demonstration of lifting plan, in order to select a more reasonable lifting plan.

Installation order: Because the steel structure in Fujian has a high requirement on installation order, if the installation order is not properly considered, the steel components do not meet the requirements of hoisting, which may affect the safety of the structure. During the construction organization and planning, the order of the devices should be arranged reasonably, and the processing, transportation of components and on-site devices should be coordinated, which should be strictly implemented in the construction process. In addition to carefully formulating the order of installation for appropriate projects, experienced construction teams should also be selected for installation to prevent quality hazards.