Key points of construction technology of super high-rise steel structure building(I)

To some extent, the level of a country’s architecture can reflect the level of its economic development and social civilization. For example: Burj Khalifa, Taipei 101, Shanghai Tower, World Finance Corporation, Petronas Twin towers, these well-known buildings are using their height to show the development level of their cities to the world. The fastest way to understand a city is to look at its buildings, which can reflect the level of technological development of a city.
First, the status quo and development trend of super high-rise steel structure buildings
Foreign research on super high-rise steel structure building has a history of about 110 years, and the increasingly mature computer technology and the continuous improvement of the architect’s super high-rise steel structure building system have also promoted the rapid development of high-rise steel structure buildings in modern times. The concrete performance is: in Europe and the United States, 65% of the total construction is steel structure, and in our neighbor Japan, this proportion has reached 50%. In 1975, 5,000 tons of steel structure production made the first peak of steel structure development in the United States. From dispersion to concentration, from concentration to more concentration, the steel structure construction industry is constantly developing. In the United States, NCI, Nucor, and Others three groups control most of the United States steel construction manufacturers association.
The design of steel structure and the research of its production technology are the two major factors that European and American countries are mainly concerned about. Throughout the process, the CNC machine tool equipment constitutes the steel structure production equipment, and the precision of the finished product is also higher than that of other products. The main characteristics of steel structure products are: light weight, high strength and fast construction speed. High quality products, high content technology, complete types and focus on environmental protection characteristics make high value-added products occupy half of the entire steel structure output. At the same time, its mature manufacturing and installation technology; High standard, high level of construction; The mechanization of the installation link, the application of intensive technology; The construction quality management in place also makes it stand out among other products, thus being unanimously recognized by the construction industry.
Second, the process of steel structure construction technology
1. Steel structure production mainly includes: steel column, steel beam, support, long-span grid, truss production. Nowadays, information is developed and transportation is convenient. In the construction market, professional processing manufacturers and installation teams are easy to find.
2. Related production steps of H-shaped steel columns and beams
(1) First of all, we must ensure that the quality of the parts is qualified, followed by the reverse deformation flatness and bending control within the range of less than 1/1000, in strict accordance with the requirements of the law to control the material error; (2) The main machines for steel structure processing are: Z15 H-beam steel assembly machine for assembly, gantry welding machine for H-beam welding. After the welding is completed, it shall be inspected according to the specifications and enter the next process after passing; (3) Assembly welding H-beam steel, according to the requirements of the code must ensure that the welding H-beam flange plate splicing weld and web splicing weld spacing control in the range of more than 200mm, and the distance between the stiffening plate should also be staggered by more than 200mm according to the requirements. (4) After the completion of H-beam welding, correction, H-beam straightener is mainly used for H-beam flange welding and deformation, the main attention in the work is strictly prohibited to press it into one time, the correct way is to roll it several times to form it; The self-made pressure frame and flame correction are mainly aimed at the problems of side bending and uneven web of H-shaped steel. (5) After a comprehensive inspection of the H-shaped steel and its qualification, the next process is carried out, and the welding plate and stiffening plate and its parts are assembled on the assembly platform.
3. Questions about the assembly of cross posts
(1) After the production of H-shaped steel and T-shaped steel has passed the inspection, the device of the cross column will be carried out. (2) Assemble the cross-shaped column in the special assembly frame, and the cross-shaped steel column is composed of one H-shaped and two T-shaped steel. After the assembly of H-shaped steel and T-shaped steel, the next process will be carried out. The welding seam of H-shaped and two T-shaped components will be welded manually by CO2 gas shielded welding machine. (3) After the assembly, welding and inspection of the cross-shaped steel column are completed, and then the assembly of smaller parts such as the connecting plate, ox leg and shear peg is carried out on the platform. (4) The cruciform steel column shall be welded after assembly and inspection, and the component shall be corrected after welding. (5) Use the ox leg or node plate as the basis to grind the head line, and then use the end face milling to smooth the end face of the upper column, and the lower joint section is broken at a 45° Angle. (6) The last step is to carry out the pre-assembly of the upper and lower columns. After the assembly is qualified, the number and the certificate are affixed to the goods yard as required.