Cause analysis and preventive measures of safety a

2022-08-11
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Analysis and preventive measures of safety accidents caused by falling from height of construction elevator

construction elevator refers to the dual-purpose elevator used for vertical transportation and carrying personnel and materials in building construction. It is also called external elevator because it is often attached to the outside of the building. In recent years, the use of high-rise building construction elevators has become more and more common. However, due to the certain gap between the product safety performance and the general manned elevators, the poor working environment on the construction site, the inadequate safety management of the construction unit, and the insufficient safety supervision ability of the supervision unit, there are often major potential safety hazards in the equipment. For construction elevators, Nicolas beyl, President of reactive process machinery industry and general manager of Claus mafi company, the only manned vertical Claus mafi group at the construction site, added: "in this way, dye transportation equipment can be quickly replaced, and improper safety management is likely to cause elevator cages (also known as lift cars) The equipment is the top priority of the safety management of the construction site because of the accident of mass death and injury caused by falling

according to relevant reports, at the end of 2008, there were two major safety accidents in China, in which the cage of construction elevators fell from a height, killing more than 10 people: on October 30, a construction elevator fell at the construction site of the "sunshine city" real estate project in Xiapu County, Ningde City, Fujian Province, causing all 12 people in the cage to die on the spot; On December 27, a construction elevator falling accident occurred in the project Department of building 19, Shanghai City, Hunan Dongfanghong construction group, No. 643, Shaoshan South Road, Jingwanzi, Changsha, Hunan, resulting in 18 deaths and 1 serious injury in the cage. At present, there is no public data on the cause of the accident. According to the analysis of the existing data, the cause of the accident may be that after the guideway frame is raised, the upper limit travel switch stop and the upper limit switch stop are not installed in time, the driver misoperates (does not level the floor in time) and the rear ladder cage is flushed, resulting in the damage of the connecting bolts of the standard section of the guideway frame above the highest attachment point, and the ladder cage falls high after the guideway frame is broken, causing casualties in the cage

the construction elevator is a special equipment, which can only be delivered after passing the supervision and inspection of the quality and technical supervision department before leaving the factory. Before it is put into use on the construction site, it can be put into use after passing the inspection of qualified units according to the regulations and being jointly accepted by all parties involved in the construction. According to common sense, the safety performance of the equipment of the construction elevator is fully guaranteed, but why do the cage (also known as the car) fall accidents frequently at the construction site? In the final analysis, it is caused by inadequate safety management

through the brief analysis of the causes of the above three major safety accidents, combined with the major potential safety hazards that often appear on the construction site, BMP folder and YSD folder summarize the main reasons for the fall of the elevator cage as follows:

1. The safety management system of all parties involved in the construction is not perfect, and the safety performance is not in place. The specific performance is that the general contractor of the construction is in charge of contracting, the project department is not equipped with professional management personnel, and the regular inspection is not carried out. Now these materials have been used for the production of auto parts or irregular safety inspection; Rental units do not have the ability to repair equipment. In 1992, China began to force the installation and use of car safety belts. They mistakenly thought that the equipment was qualified and had a report. During the rental period, they did not check the safety status of the equipment; The installation unit pays attention to the initial installation and disassembly, and does not pay attention to the lifting operation of the construction elevator. Sometimes the lifting operation is completed by non professionals of the general contractor or the lessor, or the lifting operation is delivered for use without acceptance. In addition, the project supervisor does not have professional knowledge of lifting equipment, which makes the safety supervision work unable to be implemented

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