Rapid quality inspection method for steel structure based on three-dimensional scanning technology

Abstract

The invention, which belongs to the technical field of building construction, discloses a rapid quality inspection method for the steel structure based on a three-dimensional scanning technology. Themethod comprises the following steps: step one, performing rapid scanning; to be specific, scanning a component lifting unit rapidly by using a high-precision full-station scanner to obtain point cloud data of the component lifting unit; step two, performing feature point coordinate calculation; to be specific, carrying out plane and cylindrical surface fitting by the point cloud data, establishing plane and cylindrical surface equations, and calculating three-dimensional coordinates of feature point locations; and step three, performing the quality analysis; to be specific, calculating and analyzing the three-dimensional coordinates of feature point locations to obtain three-dimensional coordinates of feature points of the component lifting unit in a construction coordinate system and a design coordinate system, calculating errors of three directions, and determining the splicing quality. According to the invention, plane and cylinder fitting, three-dimensional coordinate calculationof key point locations, and three-dimensional coordinate transformation are carried out to obtain the three-dimensional coordinates of rod nodes of the lifting unit in the design coordinate system; and the component quality of the lifting unit is evaluated based on the coordinate difference of three directions.

Description

technical field [0001] The invention belongs to the technical field of construction project management, in particular to a method for rapid quality detection of steel structures based on three-dimensional scanning technology. Background technique [0002] Since the 1980s, due to the advantages of high strength and good seismic performance, steel structures have gradually been used in high-rise buildings. In order to facilitate material transportation and shorten the construction period, steel structure buildings are increasingly [0003] More and more methods of segmental manufacturing and transportation, on-site assembly, and fragmented hoisting are used for construction. This method is conducive to material transportation, saving costs and shortening the construction period. Whether the geometric dimensions and spatial positions of on-site assembly and welding meet the specifications and design requirements is the key to the construction of steel structures. In the qual...

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Problems solved by technology

[0012] The traditional geometric quality inspection of steel structures generally adopts the method of measuring the three-dimensional coordinates of component nodes with a total station. The data obtained by the single-point measurement mode of the station instrument is very limited. When the shape of the steel structure is complex, the measurement data will not be able to fully reflect the appearance characteristics of the steel structure

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