How to Standardize the Construction Requirements of Welded Ball Space Frame Structures

In modern architecture, welded spherical grid structures are widely used in large venues, commercial complexes, and other buildings due to their excellent spatial load-bearing performance and aesthetically pleasing designs. However, their complex construction processes necessitate standardized requirements to ensure structural safety and stability.

1. Requirements for the Construction Preparation Stage

(1) Design Drawing Review

Before construction, the technical team must review the drawings, focusing on confirming the following: the structure of the space frame, how the nodes are constructed, the materials used, and the weld standards. This ensures a complete understanding of the design concept.

If any discrepancies are found in the dimensions or difficulties in constructing the nodes, these should be immediately documented and communicated with the design unit for confirmation. Work should only proceed after approval to avoid rework later.

(2) Material Quality Control

The quality of key materials such as welded balls, rods and welding materials directly affects the quality of the project. The material, specifications and surface quality of the welded balls must meet the design, and a quality certificate must be provided upon arrival and a visual inspection must be conducted; the material and specifications of the rods should be consistent with the design, and the surface should be flat; the welding materials should be selected according to the base material and process, and quality testing should be carried out upon arrival.

(3) Construction Site and Equipment Preparation

The construction site should be flat and firm with good drainage to facilitate the transportation of equipment and materials. The processing, stacking and assembly areas should be planned reasonably to ensure a smooth construction process. Equipped with high-performance welding machines, cutting machines, and other equipment, and thoroughly inspected and tested before construction to ensure that the requirements for construction accuracy and efficiency are met.

2. Welded Sphere Fabrication and Space FrameStructuresAssembly Requirements

(1) Welded Sphere Node Fabrication

Making of the cutting surface: Ensure the cut is flat; Drilling position is accurate, hole diameter and depth conform to the design, and milling surface is smooth; Clean impurities from the ball surface before welding to ensure welding quality.

(2) Member Processing and Corrosion Protection

Material is cut according to the design to ensure the member length and straightness meet the standards; Correct and process the ends to ensure geometric dimensions; Perform hot-dip galvanizing, painting, and other anti-corrosion treatments according to the design to improve durability.

(3) Space Frame Structures Assembly and Welding

Ground assembly is strictly constructed according to the drawings to ensure accuracy; Full penetration welds are made at the nodes, welding parameters are controlled to avoid defects; After welding, non-destructive testing such as ultrasonic and magnetic particle testing is performed to ensure weld quality.

(4) Lifting and Installation of the Space Frame Hydraulic equipment will be used for overall or segmented lifting, with strict control over speed and synchronization; the position will be adjusted after lifting; fixed nodes will be installed to ensure the stability of the space frame.

3. Quality Inspection and Acceptance Requirements

(1) Process Quality Inspection A quality inspection system will be established during construction. Construction teams will conduct self-inspections, and quality inspectors will conduct specialized inspections, focusing on the processing of welded spheres, the assembly of the space frame, and the quality of welding, etc., and inspection records will be kept.

(2) Completion Acceptance Requirements After construction is completed, acceptance will be conducted according to standards and specifications, and the construction unit will submit complete documentation. Acceptance personnel will comprehensively inspect the appearance, dimensions, connections, and structural performance. Load tests will be conducted if necessary, and acceptance will only proceed if the indicators meet the standards. Strict adherence to the construction requirements for welded sphere space frames throughout the entire process is essential to creating a safe and reliable project.

4. Conclusion

The construction requirements for welded sphere space frames are stringent. During construction, standardized management is required in many aspects, including material selection, construction technology, quality control, and safety measures. Through scientific design, strict construction management, and advanced construction technology, the structural safety and construction quality of welded spherical grid structures can be ensured, providing a reliable guarantee for the long-term use of the project.