What difficulties should be paid attention to in the steel structure infrastructure project


Release time:

2022-11-30

The diversity of construction quality problems of steel structure engineering projects is mainly reflected in the variety of influencing factors that cause commodity quality problems, and the important reasons that cause commodity quality problems are also complex. Even if the same attribute of commodity quality problems, the reasons are sometimes different, so the understanding, judgment and treatment of commodity quality problems improve the diversity. For example, welding gap can not only appear in the weld metal, but also in the heat damage of raw materials, both from the surface of electric welding and the internal structure of electric welding; The gap can be welded vertically or vertically. The gap can be either cold gap or hot gap

What difficulties must be paid attention to in steel structure infrastructure projects
(1) Diversity
The diversity of construction quality problems of steel structure engineering projects is mainly reflected in the variety of influencing factors that cause commodity quality problems, and the important reasons that cause commodity quality problems are also complex. Even if the same attribute of commodity quality problems, the reasons are sometimes different, so the understanding, judgment and treatment of commodity quality problems improve the diversity. For example, welding gap can not only appear in the weld metal, but also in the heat damage of raw materials, both from the surface of electric welding and the internal structure of electric welding; The gap can be welded vertically or vertically. The gap may be not only cold gap but also hot gap; The reason is that there is an unscientific difference between the selection of welding materials and the welding heating or afterheating.
(2) Adverse effects
The seriousness of construction quality problems of steel structure engineering projects is shown in: generally, it affects the smooth progress of construction, resulting in project delay, increased costs, and very serious, building collapse, resulting in safety accidents, property damage, and poor social effects.
(3) Ductility
The difficulties in quality management of steel structure engineering will gradually develop and change with the change of the outside world and the improvement of the time, and the hidden quality problems will gradually manifest. For example, due to the change of stress in the electric welding of steel structure parts, the electric welding with no gap will lead to the gap: the time delay gap will be caused by the hydrogen activity in the electric welding after welding. Also, if the prefabricated member bears the load for a long time, the steel member will have bending deformation of the lower arch, causing hidden danger.
(4) Multiple
Because modern design is mostly based on concrete structure, the staff and professional technology with professional work experience in construction are relatively unfamiliar with steel structure fabrication and construction technology, and the specific construction personnel with migrant workers as the main body are more unknown to the scientific and standardized construction technology of white steel structure construction projects, leading to frequent safety accidents in the construction process.
How to install the steel structure
According to the assembly sequence and process standards, the prefabricated components and assembly of steel structure parts shall be carried out in the steel platform to ensure the welding quality.
The distance between the splicing beam flange splicing interface and the end splicing interface of the building steel shall exceed 200 mm. The splicing length of beam flange shall not be less than 2 times the plate width; The total width of end splicing shall not be less than 300 mm, and the specification shall not be less than 600 mm.
As the welding is convenient and fast, ensure the weld quality. Try to check and weld the column, frame column plate, positioning plate, base plate and cantilever beam (beam) in the bearing wall on the ground steel platform according to the specifications and models of the engineering drawings.
In addition to the fabrication and assembly of the steel components of prefabricated components on the steel platform according to the engineering drawings, specifications and standards, it is also necessary to pay attention to the changes in the performance and size of on-site installation and use.