The overall lifting method of grid steel structure: an efficient choice for building construction

In large-scale construction projects, grid steel structures are widely used due to their unique advantages, and the overall lifting method, as an important technology for the construction of grid steel structures, provides strong guarantees for the successful implementation of many complex building projects. The following will provide a detailed introduction to the method and analyze its key points in depth.
Introduction to Overall Enhancement Method
The overall lifting method is a construction method in which the grid steel structure is assembled as a whole on the ground, and then lifted to the design elevation position by lifting equipment. This method cleverly utilizes the convenience of ground operations, greatly reducing the amount of high-altitude work and effectively improving construction efficiency and safety.
At the beginning of construction, select a suitable site on the ground and build a flat and stable assembly platform. Construction personnel assemble the members and nodes of the grid accurately one by one, just like building a precise model, based on precise design drawings. During this process, the quality of each connection point is strictly controlled to ensure that the assembled grid structure is stable and meets the design requirements.
After the grid is assembled on the ground, it enters the lifting stage. The rational selection and arrangement of equipment improvement is a key step. Common lifting equipment includes hydraulic jacks, electric hoists, etc., which are connected to the grid structure through lifting frames set around or at specific locations. These lifting devices work together under the unified command of the control system to smoothly lift the grid to the predetermined height.
Key analysis
Enhance equipment selection and layout
Accurately calculate the load-bearing capacity and quantity of equipment to be lifted based on the weight, size, and lifting height of the grid. The layout of the lifting equipment should be evenly distributed to ensure that the stress on each part of the grid is balanced during the lifting process, and to avoid local stress concentration that may cause structural deformation. For example, for large circular grids, lifting equipment can be evenly arranged along the circumference to ensure the stability of the lifting.
Structural verification and reinforcement
It is crucial to conduct comprehensive and detailed structural verification of the grid structure before upgrading. Not only should the stress situation of the truss under its own weight be considered, but also factors such as dynamic loads and wind loads that may occur during the lifting process should be fully taken into account. According to the verification results, necessary reinforcement treatment should be carried out on the weak parts to enhance the overall stiffness and stability of the grid structure, ensuring that it can withstand various forces during the lifting process.
Synchronous control
The synchronization of each lifting point is the core point to ensure the safety of the grid structure during the overall lifting process. Minor asynchronous lifting can cause excessive internal forces and deformation in the grid structure, and even lead to structural damage. Therefore, advanced synchronous control systems must be adopted to monitor the displacement and force situation of each lifting point in real time. Once a deviation is detected in a certain lifting point, the system can quickly and automatically adjust to ensure that all lifting points maintain synchronous lifting.
Temporary support setup
After the grid is raised to the design elevation, reliable temporary supports need to be installed. The function of temporary support is to bear part or all of the load of the grid before the connection between the grid and the permanent support structure is completed, ensuring that the grid is in a stable state. The position, quantity, and bearing capacity of temporary supports should be determined based on the characteristics of the grid structure and stress analysis, and their verticality and elevation should be strictly controlled during installation to ensure the reliability of the support.
Emergency plan formulation
Although the overall lifting method has undergone detailed planning and calculation before construction, it may still face various unexpected situations during the construction process, such as equipment failures, sudden weather changes, etc. Therefore, it is essential to develop a comprehensive emergency plan. The emergency plan should cover various possible risks, clarify the emergency response process and division of responsibilities, and provide necessary emergency materials and equipment to ensure that quick and effective response measures can be taken in emergency situations, ensuring construction safety and project progress.
The overall lifting method of grid steel structure occupies an important position in modern construction due to its unique advantages. However, to ensure the smooth implementation of this method, it is necessary to deeply understand and strictly control each key point, achieve scientific planning and precise construction, and thus achieve efficient and safe construction goals, laying a solid foundation for building high-quality construction projects.