When the height of the scaffolding exceeds 5 meters, it is classified as high formwork, which requires the preparation of a special construction plan. High formwork has a high safety hazard due to its large height and span.
Among high-formwork accidents, formwork collapse is one of the most common and extremely harmful accidents, accounting for about 30% to 50% of major construction accidents. In order to prevent such accidents, the following key points should be noted:
1. The formwork system must be able to withstand large horizontal loads, such as the horizontal thrust of the pumping concrete pipeline and wind load. If these loads exceed the bearing range of the formwork, it may cause the horizontal surface layer of the formwork to collapse.
2. The longitudinal, transverse, and horizontal scissor braces of the formwork system must be set reasonably. If the setting is unreasonable, it will cause uneven force on the overall high formwork or excessive local load, thus causing collapse.
3. The step distance of the formwork system poles cannot be too large. Too large a step distance will greatly reduce the overall formwork stress. If the pouring is carried out according to the conventional construction, the high formwork is likely to collapse.
4. The buildings and environmental complexity around the foundation pit will also have an impact on the overall construction site, which requires special attention.
Through these preventive measures, the occurrence of high-formwork accidents can be greatly reduced to ensure construction safety.
Post time: Mar-26-2025