What are the main construction techniques for steel structure projects?

I.Construction process of indoor space steel structure project

Indoor space steel structures are lightweight, have high bending rigidity, are aesthetically pleasing in design, and are faster to construct. Seamless steel pipe as the component of ball connection point plate, computer spherical net frame, double-layer variable cross-section spherical net frame,e and net shell are the construction forms of indoor space steel structure with large usage in our country. With the advantages of large indoor space, bending stiffness, and low steel content, it has the advantages in designing programs, engineering construction,on and testing technical specifications, and can present perfect CAD.Besidess the steel structure net frame, the space layout also has a large-span suspension cable structure, a cable membrane structure, and so on.

II.light steel structure engineering construction process

The light-shaped color-coated steel plate, made of wall and flat roof rack structure constitutes a new structural form. By 5 millimeters above the thick steel plate electric welding welding or cold rolled large cross-section of thick-walled H-beam wall beams and steel purlins, round steel made of soft terminal software and high-strength bolts connected to the light steel structure management system composed of the column spacing can be from 6m to 8m, the span reaches 30m or more, the height-to-width ratio reaches more than a dozen meters with the amount of steel content of 20 ~ 30kg / ㎡. The steel structure industrial plant can be installed faster, lighter in weight, with less project investment, and the project construction will not be limited by the season, so it is suitable for all kinds of light-form factory buildings.

III. The steel mixed soil composition structure technical

to channel steel or steel and soil components constitute the beam, column load structure for steel mixed structure composition structure, in recent years, the scope of application is expanding day by day. Composition structure combines the advantages of both steel and concrete, overall compressive strength, good stiffness, excellent seismic grade performance, when the business outsources the concrete structure, more excellent fire and corrosion resistance. The composition of structural elements can generally reduce the use of steel content by 15 to 20%. Composition of dense-ribbed floor cover and steel pipe concrete members, but also has the advantage of less support or no support, convenient and rapid construction. It is suitable for frame columns, columns, and dense-ribbed floor cover of double-story or multi-story buildings with large loads, and columns and dense-ribbed floor cover of public buildings.

IV.High-strengthh bolt connection and welding process

High-strength bolts are based on sliding friction to transmit the ground stress, with the ground bolt, nut, and sealing ring three parts of the composition. High-strength bolt connection project construction is simple, dismantlingis convenient, has high bearing capacity, fatigue relieving performance, and locking good performance, high safety factor, engineering projects have replaced riveting and part of the electric welding, with the production of steel structure and installation of the key connection method. For the steel components made in the production workshop, the thick steel plate should be fully automatic multi-wire arc submerged welding, and the box-shaped column baffle should be Jungzu electroslag welding and other technicalities. For on-the-spot installation construction site, fully automatic welding technology and gas-shielded flux-cored wire and self-maintained flux-cored wire technology should be adopted.

V.steel structure project safety protection technical

Steel structure safety protection contains fire safety, corrosion prevention, rust prevention treatment. is generally used in fireproof material solution without rust prevention treatment solution, but in the project building with leaching gas still need to do corrosion prevention solution. There are many types of fireproofing materials in China, such as TN series products, MC-10, etc. Among them, MC-10 fireproofing materials include alkyd magnetic paint, chlorinated rubber paint, fluorine rubber architectural paint, and chlorosulphonated architectural paint etc. In the construction site, it should be based on the form of the steel structure. In the construction site, suitable architectural coatings and coating thickness should be adopted according to the form of steel structure, fire rating regulations, and natural environment regulations.