| Steel structure building in the construction industry occupies an important position and the huge market share, it by its unique advantages is widely used in industrial buildings and civil buildings and large public buildings. As steel power in our country, in the development of steel structure building has a large market potential, but at present our country’s steel structure is still in a stage of development, especially the experience of high-rise steel structure construction technology is still insufficient, this causes our country existing in high-rise steel structure production, installation of variable quality, prone to quality defects, affect the normal construction period, etc. So for high-rise steel structure production and installation of the key points in the process of careful research, through constant of the key technology of the actual project summary and induction, provide effective experience for high-rise steel structure construction, prevent quality deviation, improve project quality and project schedule.In this paper, henan zhengzhou YuDa guomao multi-functional conference center, for example, involved in the construction process of high-rise steel frame structure of the steel frame and steel frame structure of the installation process, process control, quality control and other key construction technology has carried on the detailed research and summary.(1) Steel frame production mainly discussed on the material selection of Q345B steel column; Material cutting blanking by CNC plasma cutting machine, flame strip cutting machine or numerical control flame cutting machine; Case of group to adopt the platform; Group the following using CO2shielded welding and submerged arc welding automatic welding welding; Welding the weld using electroslag welding casing.(2) Type type steel beam mainly for BH steel beam, steel group to adopt the platform, to control the shape of tolerance, fixed beam slab in the group adding appropriate pad on the platform to prevent steel beam deflection. (3) Steel frame installation steps involved in the process of construction was studied, including high strength bolt connection construction should be at the center of the steel members, bolt through direction should agree, the bolt can’t own through holes should be used reamer, bolts into the early twist, twist, fastening should joint center to the end.(4) Steel structure installation of welding technology, welding sequence of reasonable arrangement and selected typical position of welding control, and the typical h-beam welding parts of the H steel butt weld, through the test to determine the reasonable process. Welding sequence for the top and bottom wing plate welding alternately, hierarchical multichannel welding.(5) Pressed for Q235two-sided galvanized galvanized steel275g/m2, installation of open hole using plasma cutting machine cutting, the hole around using Angle steel and channel steel as enclosed beam reinforcement reinforcement of holes.Based on the research of the actual steel structure project, summarized refining the key technical points of actual construction, for the future similar high-rise steel structure engineering construction to provide the corresponding control parameters and control measures. |
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