In recent years, steel structure technology has developed rapidly.Steel structure light steel plant, large span plant and high-rise buildings.Especially the portal frame structure is widely used Installation of steel structure: 1. Positioning measurement Based on the design data, the base level...
In recent years, steel structure technology has developed rapidly.Steel structure light steel plant, large span plant and high-rise buildings.Especially the portal frame structure is widely used
Installation of steel structure:
1. Positioning measurement
Based on the design data, the base level elevation, axis and column spacing are retested.A cross - crossing line with two axes on the top of the base is used as a positioning reference for the mounting column.
2. Column mounting
To eliminate column length of manufacturing error influence on column elevation, hoisting, measure plane down 1 m from the bracket as section of theoretical level, marked clearly marked, used to adjust column elevation benchmarks.On the upper surface of the column, mark the crossbar of the crossbar in the center of the column, as the benchmark for the positioning of the column.When installed on the pipe with cross line, on the basis of first level to the elevation of theory of mark in the column for the elevation of the calibration column, and then use block and padded, tighten bolts.The vertical alignment of the vertical column is corrected by two theodolite, and the bolt is tightened after the requirement.For the vertical column of the single unstable structure, temporary protection of the wind cable can be used.For the design of columns supported by columns, the structure stability can be enhanced with the support of mounting columns.
3. Crane beam installation
Before the crane beam is installed, it should be checked and installed when the deformation is not too high.Crane beam after monolithic hoisting in place should be timely and bracket bolted connections, and the connection between the flange beam and the column plate connection, use level and the wei instrument adjust sighting, meets the requirements after tighten bolts.
4. Roof beam installation
Roof beam in the ground before the assembly, should check to deformation when the component is not overrun, high strength bolt connection friction surface no sediment and other sundry and confirm the friction surface smooth, dry, may be assembled on the ground.When assembling, use the non-oil sleeper to make up the components, and the sides of the components are supported by wooden bars to enhance the stability.The assembly of the roof beam of steel structure is made of two columns as one unit. After the unit is spliced, it shall be tested:
The straightness of the beam;
The spacing dimension of bolt holes connected with other components, such as pillars.Tighten the high strength bolts after adjusting the inspection to meet the requirements.
5. Attachment installation
The roof purline and the wall purline are installed simultaneously.Before the purline is installed, check the deformation of the components. If there is a limit, remove the oil, sand, etc.Take a number of purlines as a group, hang together, and check the purline slope after the installation is completed.The straightness of the purline is required to be controlled within the allowable deviation range, otherwise the connection bolts (and gasket blocks necessary) will be used to adjust.