There are 11 regulations that should be met by the quality acceptance of steel structure engineering in Chengdu

Category： Industry News

Time：2020-07-06

There are 11 regulations that should be met by the quality acceptance of steel structure engineering in Chengdu

The quality acceptance of the main structure of multi-storey and high-rise steel structures, underground steel structures, secondary structural parts such as purlins and wall frames, steel platforms, steel ladders, protective railings and other projects must comply with the following regulations.

1. Multi-storey and high-rise steel structure installation projects can be divided into one or several inspection batches according to floors or construction sections, and underground steel structures can be divided into inspection batches according to different underground layers.

2. The pre-assembly project of steel components can be divided into one or several inspection batches according to the division principle of steel component production engineering inspection batches.

3. The supporting stool or platform used for pre-assembly should be measured and leveled, and all temporary fixing and tensioning devices should be removed during inspection.

4. The quality of the pre-assembled steel components should meet the requirements of the design and the provisions of the

standard qualified quality, and the length and dimensions of the columns, beams, supports and other components should also include deformation values such as welding shrinkage allowance.

5. When installing columns, the positioning axis of each column should be led directly from the ground control axis, not from the axis of the lower column.

6. The floor level of the structure can be controlled according to the relative level or design level.

7. Installation measurement and correction, high-strength bolt installation, construction at negative temperature and welding process, etc. should be tested and evaluated before installation, and the corresponding construction process or plan should be formulated on this basis.

8. The detection of installation deviation should be carried out after the structure has formed a spatial stiffness and the connection is fixed.

9. During installation, the construction load of roof, floor, platform, etc.

must be controlled, and the construction load and ice and snow load are strictly forbidden to exceed the bearing capacity of beams, trusses, floor panels, roof panels, platform panels, etc.

10. After the formation of the spatial stiffness unit, the voids of the column floor and the top surface of the foundation should be timely carried out with secondary grout such as fine stone concrete grout.

11. The steel structure installation inspection batch should be accepted on the basis of the acceptance of the entry and the acceptance of sub-projects such as welding connection, fastener connection, and production.

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