Cause analysis of scaffold collapse and explanation of preventive measures?

Scaffolding collapse

(1) The operators are weak in safety awareness and violate the rules. The scaffolder did not wear safety helmet and safety belt correctly according to the regulations when erecting and dismantling scaffolding. Many workers think that they are experienced and careless, and that as long as they are careful, they will not have an accident without wearing a helmet and a seat belt, leading to a fall accident. In addition, underestimation of possible dangers and failure to find safety protection at the construction site in time will also lead to accidents.

(2) Scaffolding does not meet the specification requirements. The industry standard of the Ministry of Construction, Safety Technical Specification for Fastening Steel Pipe Scaffolding in Building Construction (JJ130-2001), is a mandatory standard, which puts forward many new requirements in scaffold design and calculation, erection and demolition, frame structure and so on. However, in some construction sites, the phenomenon of irregular scaffolding is still widespread, resulting in many workers' casualties.

(3) The scaffold erection and dismantling scheme is not comprehensive, and the safety technical disclosure is not targeted. Safety technical disclosure still stays at the level of "safety helmet must be worn when entering the construction site", which lacks pertinence. Operating by personal experience in engineering construction will inevitably lead to hidden dangers of accidents and violation of operating rules and technical specifications, and even lead to casualties. Safety inspection is not in place, and hidden dangers of accidents are not found in time. In addition, the project manager, foreman and full-time safety officer failed to find problems in time during regular safety inspection and peacetime inspection, or failed to make timely rectification and correction after finding problems, and were responsible for the accident. Preventive measures:

Collapse rescue exercise

Operators should hold relevant certificates, and carry out safety technical disclosure. Scaffolding can only be put into use after it is qualified. Strictly control the relevant building materials used in the project, and prohibit unqualified materials from being put into use. Strengthen the preparation and review of formwork operation technical scheme, recheck the rigidity and strength of formwork support, and strictly control the construction load, especially the concentrated load on the floor shall not exceed the design requirements.

If the deflection of the cantilever steel beam rooted by scaffolding exceeds the specified value, the rear anchorage point of the cantilever steel beam should be strengthened, and the steel beam should be tensioned with steel support and U-shaped bracket and then pushed against the roof. There is a gap between the embedded reinforcing ring and the steel beam, which must be tightened with a horse wedge. Check the wire ropes hanging at the outer ends of steel beams one by one, and tighten them all to ensure uniform stress. If the unloading system of scaffolding is damaged locally, it should be repaired immediately according to the unloading method formulated in the original plan, and the deformed parts and bars should be corrected.

Large scaffolding must prepare technical scheme, strengthen daily patrol inspection, and take emergency measures in time for deformation or foundation settlement. Focus on the supervision and inspection of mass concrete pouring operation process, assign special personnel to patrol, and report and handle any abnormality in time. Strengthen the safety inspection of scaffolding before use after heavy wind and rain, and take timely remedial measures for foundation settlement and vertical pole suspension. Strengthen the daily inspection of Rachel support of independent scaffolding, and urge the rectification in time when abnormal conditions are found. When the scaffold is dismantled, it is forbidden for non-operating personnel to do any work on the scaffold.

I believe that after the above introduction, everyone has a certain understanding of the cause analysis and preventive measures of scaffold collapse. Welcome to Zhong Da for more information.

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