Factors affecting the use of grid steel structure

Category： Industry News

Time：2020-07-08

What are the reasons that will cause quality problems in the use of grid steel structure?

1. Due to load changes, overdue service, and changes in specifications and procedures, the bearing capacity of the structure is insufficient;

2. Due to various accidents, the component is deformed, twisted, disabled, dented, etc., resulting in weakened component cross-section, member warping, connection cracking, etc.;

3. Deformation, cracking and warpage of components or connections caused by temperature difference;

4. Corrosion due to the erosion of chemical substances and electrochemical corrosion lead to the weakening of the cross-section of steel structure components;

5. Others include errors in design, production and construction, as well as illegal use and operation during service.

Grid steel structure

is widely used in modern engineering, if the damage will directly affect the safety problem, so after the factors that lead to steel structure damage are clear, corresponding measures should be made in time to avoid greater problems.

So what problems do we need to pay attention to before the construction of the steel structure grid:

1. Before installation, the axis and elevation of the grid support should be inspected. The grid axis and elevation position must meet the design requirements and the provisions of relevant standards.

2. Before installation, the strength of the concrete on the top of the column

should be inspected, and the strength of the concrete at the top of the column must meet the design requirements and the provisions of the current relevant standards of the country before installation.

3. When using the overall lifting or partial lifting method, the lifting equipment should be inspected, and the lifting speed, lifting lifting point, high-altitude closing and adjustment should be tested, which must meet the requirements of construction organization design.

4. When using the high-altitude bulk method, a full house of red scaffolding should be erected, and the position and elevation of each fulcrum should be arranged. When using the bolt ball high-altitude bulk method, the temporary fulcrum should be designed and arranged, and the location and number of the temporary fulcrum should be determined by verification.

5. When using strip and block installation, when the workbench slip method, the ground workbench and sliding equipment should be inspected, and the test sliding test should be carried out.

6. When the high-altitude slip method is adopted, the sliding track pulley should be inspected, and the horizontal slope of the slip should meet the requirements of the construction design.

7. The temporary fulcrum of high-altitude bulk should be selected with jacks, so that the temporary fulcrum can gradually adjust the height of the grid. When the temporary bracket is removed at the end of the installation, it can be lowered synchronously between the fulcrums and unloaded in stages.

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