X-ray inspection method for the quality of vertical reinforcement connection between layers of double-sided laminated shear walls

Abstract

The invention discloses an X-ray detection method for double-sided superimposed shear wall interlayer vertical steel bar connection quality. The method comprises the following steps of: S1, arranginga transverse first reference line on the back surface of a double-sided superimposed shear wall, and arranging a vernier marker; S2, arranging a plurality of detection areas; S3, arranging a digital imaging plate in an initial detection area; S4, finding out a corresponding position of the center of the digital imaging plate on a front surface of the double-sided superimposed shear wall and performing marking; S5, erecting an X-ray machine and pasting an emission port center marker; S6, setting parameters of the X-ray machine and performing shooting and imaging; S7, repeating the steps S4-S6 in different detection areas, conducting shooting and imaging in each detection area in sequence, and performing enhancement processing on digital imaging images; and S8, detecting the steel bar lengthand spacing and the compactness of the post-poured concrete according to the digital imaging images. By presetting the transverse first reference line, the vernier marker, the emission port center marker and other reference objects, the purpose of precisely calculating the length and spacing of the vertical connecting steel bars is achieved, the detection efficiency is high, and the connecting quality can be comprehensively evaluated.

Description

technical field [0001] The invention relates to the technical field of prefabricated buildings, in particular to an X-ray detection method for the connection quality of vertical steel bars between layers of a double-sided laminated shear wall. Background technique [0002] Double-sided laminated shear wall structure, as one of the prefabricated shear wall structures, is vertically connected by pouring concrete into the cavity. When the pouring reaches a certain height, insert bars in the cavity, and then continue pouring concrete , part of the inserted steel bar is buried in the concrete of the lower layer, and part of it is exposed outside, and the upper layer shear wall and the lower layer shear wall are connected to form a whole. Since the size of the cavity is much larger than the space required for inserting the bars, during the installation process, the double-sided laminated shear wall is more convenient for construction, and construction difficulties will not be caus...

AI Technical Summary

Problems solved by technology

The length and width of the conventional type of digital imaging board configured by the portable X-ray machine are about 400mm, while the designed anchorage length of the vertical connection reinforcement of the double-sided laminated shear wall is usually about 500mm, and for the double-sided laminated shear wall The distance between vertically connected steel bars is also an important detection index, and the digital imaging board cannot cover the entire steel bar connection area

When detecting the length of vertically connected steel bars, only a partial image of the steel bar can be captured. It should be noted that the image of this part of the steel bar is projected onto the digital imaging board after being enlarged by a certain proportion. The lower edge of the digital imaging board The height is not consistent with the height of the upper end of the non-projected part of the steel bar, and the length of the non-projected part of the steel bar cannot be determined, so the length of the entire vertically connected steel bar cannot be calculated

In the process of steel bar spacing detection, even when the actual steel bar spacing meets the design requirements, it may happen that two adjacent vertically connected steel bars to be inspected do not appear in the same digital imaging image, and the spacing cannot be determined. Calculated, if it is necessary to ensure that two adjacent vertically connected steel bars are photographed every time, the moving step of the digital imaging board must be strictly controlled, but this method is inefficient and the number of photographs increases the detection cost; what's more, when the actual Due to construction quality problems in the project, when the spacing between steel bars at individual points is too large, exceeding the length of the numerical imaging board, no matter how the numerical imaging board is arranged, it is impossible to image two steel bars on the same map at the same time, and it is impossible to measurement calculation

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