Key technical points of steel structure construction

Production technology of structural components and special-shaped joints: all kinds of large-span, complex spatial shapes of steel structure buildings need complex local forces, making difficult steel components, so in the construction of complex engineering projects should consider the production of structural components and special-shaped joints should meet the stress conditions, to ensure the quality and safety of the project.

Integral slip construction technology: the key problem in the construction of long-span steel structure is the stability of the structure before forming the whole space. This problem can be solved by moving the structure divided into several stable bodies horizontally from the assembling position to the design position along a certain track by means of sliding construction technology, which can control and synchronize the traction equipment. However, it is necessary to pay attention to the characteristics of large stiffness outside the plane of the structure, the need to lay track, and the difficulty of synchronous control when multi-point pulling.

Overall improve construction technology: the technology by hydraulic jack as power equipment, according to the requirements of the operating point lifting force, will be a number of hydraulic jacks and hydraulic valve group, pumping stations, such as cluster into hydraulic jack, and synchronous movement under computer control, to ensure smooth ascension or posture of the shift process for the huge structure, load balancing.

High altitude without bracket assembled construction technology: high block expanding unit without bracket assembly technology, the construction principle is: the reasonable structural system section, choose lifting order, make the construction process without having to build support platform, USES the stiffness of the structure to form stable unit, through expanding unit installed, finally form the whole structure.

Steel structure welding construction technology: welding, for the requirement of full penetration welding seam, should try to use single-sided welding double-sided forming process, in order to ensure uniform heating everywhere; For the welding parts with fast heat conduction and large heat dissipation area, the beginning and joint of the weld can be welded after long arc preheating, and the flame is used for heating before welding or welding at the same time. At the same time, the welding current should not be too small and the welding speed should not be too fast. At the same time, attention should be paid to the flow direction of slag to prevent the formation of solid inclusion, and as far as possible to keep vertical, avoid excessive tilt.

Steel structure anti-corrosion construction technology: the combination of roll coating and brush coating should be used for construction, roll coating should be used for large-area construction, and brush coating should be used for small components. The specific construction method should be reasonably choosed according to site conditions. At the same time, should make the direction of the first layer of primer paint brush to keep consistent, and then croucher neat, and should follow the principle of frequent dipping, short brush, in accordance with the requirements of the specification operation, in order to prevent the brush with paint too much and caused by falling. In addition, when besmear is brushed, cannot exert oneself too much, answer to brush number shoulds not be overmuch, and should freely interweave besmear is brushed, in order to increase each coating is bound to each other, complement besmear is brushed inadequacy place.