Elevation errors of common mistakes in the installation of aluminum formwork by aluminum formwork manufacturers

Elevation errors of common mistakes in the installation of aluminum formwork by aluminum formwork manufacturers

Elevation error phenomenon: When measuring, it is found that there is an error between the elevation of the concrete structure layer standard and the embedded parts, the elevation of the reserved holes and the design elevation of the construction drawing.

Reason analysis: There are no elevation control points or too few control points on the floor, and the control net cannot be closed; the root of the vertical formwork is not leveled. There is no elevation symbol on the top of the template, or construction is not performed according to the symbol. There are too many retests of the high-rise building elevation control line, and the cumulative difference of aluminum formwork manufacturers is large. The embedded parts and reserved holes are not fixed firmly, and the construction method is not paid attention to during the construction. The stair step template does not consider the thickness of the decorative layer.

Prevention measures: each floor is equipped with a satisfactory elevation control point, and the roots of the vertical formwork must be leveled. An elevation symbol is set on the top of the template, and the construction shall be strictly followed. The elevation of the floors constructed by aluminum formwork manufacturers is controlled by the first floor ±0.00 elevation, and it is forbidden to measure upwards layer by layer to avoid cumulative errors. When the construction height exceeds 30m, another elevation control line should be set up, and the elevation test points of each floor should be no less than 2 for review. The embedded parts and reserved holes should be compared with the drawings before installation, and they should be accurately fixed at the design position after confirming that they are correct. If necessary, they should be fixed by electric welding or framing. The aluminum formwork manufacturers should follow them when pouring concrete. The surrounding layer is evenly poured, and it is forbidden to hit and vibrate the embedded part template. The thickness of the decorative layer should be considered when installing the stair step template.