How to ensure the construction safety of demolitio

2022-07-26
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How to ensure the construction safety of demolition works

with the acceleration of urban modernization in China, the demolition of old buildings is also increasing. The structure of demolished buildings has also developed from brick and wood structure to mixed structure, frame structure, slab structure, etc., and from house demolition to the demolition of buildings or structures such as chimneys, water towers, bridges, wharves, etc. Therefore, the relationship between the load on the sample and the time is important: the demolition and construction of static machines and decadent machines (structures) have become an industry in recent years. The demolition project is one of the auxiliary stages of the construction project. Previously, it was paid limited attention, and safety accidents occurred frequently in the demolition project. At the same time, because demolition projects are often contracted to unqualified units or individuals, the construction personnel lack basic safety protection facilities and labor protection articles during the construction process, and can not get due pension and compensation after the accident, causing irreparable pain and economic losses to the families of the victims, and bringing adverse statistical impact and additional burden to the government and society

Article 11 of the regulations on the administration of work safety of construction projects clearly stipulates that the construction unit shall, 15 days before the construction of the demolition project, submit to the competent construction administrative department or other relevant departments for the record the certificates of the construction unit's qualifications, the descriptions of the buildings, structures to be demolished and the adjacent buildings that may be endangered, the demolition construction organization plan, and the measures for stacking and removing wastes. The Ministry of construction also takes the construction safety of demolition works as one of the special governance works, which shows that the government and all social parties attach great importance to the construction safety of demolition works

I. strengthen the qualification management of demolition engineering construction enterprises

1 Regional construction administrative departments shall establish and improve systems for demolition projects (buildings and structures) within their jurisdiction, implement unified management, clarify responsibilities, strengthen supervision and inspection, and ensure the safety of demolition construction

    2. For the construction of demolition works, the filing system shall be implemented. The construction unit shall, 15 days before the construction of the demolition project, submit the qualification certificate of the construction unit, the description of the buildings, structures to be demolished and the adjacent buildings that may be endangered, the demolition construction organization plan, and the measures for stacking and removing wastes to the construction administrative department or other relevant departments for the record

    3. The construction enterprise of demolition project must have the professional contracting qualification of demolition project, undertake the project according to the corresponding level regulations, and strictly prohibit the contracting of projects and subcontracting projects beyond the level. If it is necessary to change the construction team, the Bayer expert group on site shall be filed again with 8 senior technical experts from overseas who are good at transportation, construction and industrial utilization

II. Make preparations before demolition

1 The demolition construction enterprise must first prepare the safety construction organization design. The construction law stipulates that "for engineering projects with strong professionalism, construction organization design shall be prepared and safety technical measures shall be taken." The construction organization design must formulate orderly construction sequence and targeted safety technical measures. During the construction process, if the construction method must be changed and the construction sequence must be adjusted, the construction organization design must be modified and supplemented first

    2. Before the construction of demolition works, the construction personnel must receive professional safety training and pass the examination before they are allowed to work. At the same time, safety education shall be provided to the construction personnel, who shall be organized to learn the safety operation procedures when encountering fire, and be familiar with the as built drawings of the demolished buildings (or structures), so as to understand the structure, building conditions, water and electricity, equipment and pipelines of the buildings. The person in charge of the construction site shall make detailed disclosure to the staff participating in the demolition according to the construction organization design and safety technical regulations

    3. Before the construction of demolition works, materials and equipment within the scope of demolition and collapse shall be removed first; Cut off or relocate the main lines such as electric wires, gas pipelines, water pipes and heat supply equipment from the branch lines of the building: check the surrounding dilapidated houses and temporarily reinforce them if necessary; Give public notices to the surrounding people. Set up fences and warning signs around the demolition danger area, assign special personnel to supervise, and prohibit non demolition personnel from entering the construction site

    4. For the demolition of buildings that produce, use and store hazardous chemicals, the fire protection and safety departments shall participate in the review, formulate plans to ensure safety, and implement the demolition works after approval

    5. When preparing to demolish the project by controlled blasting, it must be carried out in strict accordance with the blasting safety regulations, and the blasting design must be carried out to strictly calculate the initiation point, detonator, dosage and blasting procedure, so as to ensure the absolute safety of surrounding buildings and personnel. Prepare technical and safety measures for blasting demolition and submit them to the superior department and the public security department for approval. During blasting, the buildings dumped by their own weight shall be subject to strict calculation to ensure safety. In addition to the dead weight, the instability degree of the non explosive part under the maximum wind force in the most unfavorable direction shall also be considered in the calculation

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