In recent years, due to the chaos in the construction and leasing market, illegal acts of producing and selling inferior steel pipes and fasteners have become prominent. A large number of unqualified steel pipes and fasteners have flowed into the construction site. In addition, the construction unit’s irregular use has seriously endangered the construction safety of the building. Recently, the Ministry of Construction, the General Administration of Quality Supervision, Inspection and Quarantine and Industry, and the State Administration for Industry and Commerce jointly issued the “Notice on the Special Rectification of Steel Pipes and Fasteners for Building Construction”, which requires that through this special rectification, production, sales, lease and use of inferior buildings The condition of steel pipes and fasteners for construction has been obviously reversed. At present, there are more than 10 million tons of scaffolding steel pipes in the country, of which 90% are inferior, overdue and unqualified steel pipes, and the total number of fasteners is about 1-12 million, and the qualified rate is zero. Such a large amount of unqualified steel pipes and fasteners have become a hidden danger to construction safety, and it is impossible to complete the rectification work in a short time.
The safety problem of building scaffolding has always been a difficult problem in building construction, and several accidents of scaffolding collapse occur every year. How to improve the safety of the scaffolding and ensure the construction safety of the scaffolding, let’s talk about some points from the Japanese scaffolding management experience:
First, vigorous development of new scaffolding is an important guarantee for solving construction safety
In the 1950s, Japan began to use a large number of fastener-type steel pipe scaffolding. By the mid-1950s, the application of fastener-type steel pipe scaffolding had dominated. Due to the constant occurrence of casualties, it was reported that the number of casualties reached 2856 in one year. Therefore, the safety of scaffolding has attracted great attention from relevant government departments.
In the early 1960s, portal scaffolding began to be widely used in engineering due to the convenient installation and disassembly of the portal scaffolding, good load-bearing performance, and safety and reliability, especially the provisions of the Ministry of Labor on the safe use of scaffolding. In the early 1970s, with the increasing number of super high-rise buildings in Japan and the extensive development of scaffolding rental business, the application volume of gate scaffolds increased rapidly and has become the dominant scaffolding.
At present, Japan has also developed and researched various types of scaffolding such as H type, folding type, bowl buckle type, disc type, jack type and slot type. Due to the poor safety of the fastener steel pipe scaffold, it has been rarely used in construction projects.
In the early 1960s, China began to use fastener-type steel pipe scaffolding. Because this type of scaffolding has the characteristics of flexible assembly and disassembly, convenient handling, strong versatility, and low price, it is widely used in China. Its usage accounts for more than 60%. The most used scaffolding currently. However, the biggest weakness of this kind of scaffolding is its poor safety and low construction efficiency. With the emergence of a large number of modern large-scale building systems in China, this type of scaffolding can no longer meet the needs of the development of building construction. Therefore, it is imperative to vigorously develop and promote the application of new scaffolding. Practice has proved that the new type of scaffolding is not only safe and reliable in construction, fast in assembly and disassembly, but also reduces the amount of steel used in scaffolding by about 33%, and improves the efficiency of assembly and disassembly by more than 8-10 times. The construction cost can be significantly reduced, and the construction site is civilized and clean. In the early 1980s, China has introduced various types of scaffolding such as door scaffolding, bowl buckle scaffolding from abroad. Portal scaffolding has also been widely used in many domestic projects and achieved good results. However, portal scaffolding has not been widely promoted and applied, and many gated scaffolding manufacturers have closed or switched to production. At present, there are still a small number of portal scaffolding factories in China. Most of their products are processed according to foreign business plans and exported abroad. Bowl buckle scaffolding is the most popular scaffolding in the new type of scaffolding, but it is not widely used. There are only a large number of applications in some areas and projects in China. However, in recent years, most of the bowl buckle scaffolds on our domestic market are non-standard products produced in Hebei. Construction accidents have also been one after another, which is deeply worrying. Now there is a newly developed in-line double self-locking multifunctional steel pipe scaffold on our domestic market, which is very advanced and can adapt to the application of various assembly and support systems of various scaffolds. Therefore, vigorously developing and promoting the application of new inline double self-locking scaffolding and gradually replacing the fastener-type, door-type and bowl-type scaffolding with poor safety are important guarantees for the safety of scaffolding construction