Ultrasonic comprehensive factor graph identification detecting method of sleeve grouting fullness

Abstract

The invention provides an ultrasonic comprehensive factor graph identification detecting method of sleeve grouting fullness. A 'spectral model difference' calculation method of 'distortion coefficient' characterizing the distortion degree of waveform is first proposed as a quantized acoustic parameter characterizing the distortion degree of waveform. The invention also provides a 'comprehensive factor calculation method' and a grouting fullness determination method of 'comprehensive factor graph identification method'. The method adopts a defect recognition idea and a judgment idea completelydifferent from the conventional probability method and achieves the technical index requirement of the sleeve grouting fullness detection on the premise that the detection cost is not improved and thedetection efficiency is not affected. For internal defect detection of other concrete structures, especially for the component part with complicated beam plate column nodes and the component with extremely concentrated inner reinforcing steel bars, preferable test results are also shown; the method has important significance in promoting large-scale development of industrial buildings, engineering quality guaranteeing and using safety; and technical basis and equipment support are also provided for engineering construction and standard formulation.

Description

technical field [0001] The invention relates to the technical field of quality control and detection of assembled concrete buildings, in particular to an ultrasonic comprehensive factor pattern recognition and detection method for the fullness of sleeve grouting, which is an ultrasonic method for sleeve grouting connection of assembled concrete structures. The technology of non-damage detection of the grouting fullness inside the reinforced sleeve of the method. Background technique [0002] Prefabricated concrete structure means that some or all of the components and parts are produced in the prefabricated factory, and then transported to the construction site. The components are assembled by reliable connection methods and installation machinery to form a structure with the designed load-bearing function. Compared with cast-in-place structures, prefabricated construction has the advantages of convenient construction, fast project progress, little impact on the surrounding ...

AI Technical Summary

Problems solved by technology

However, in the grouting fullness test, due to the relatively small scale of the grouting layer relative to the propagation path, the air layer defect caused by insufficient grouting or even no grouting has a great impact on the safety of the structure, but it is still a small-scale defect as an acoustic defect. Therefore, in many cases, the abnormal position measurement results determined by the acoustic parameters of sound velocity and first wave amplitude are not consistent, and there may even be obvious or even opposite conclusions. Since there is no unified quantitative parameter, the tester difficult to make a final decision

[0015] This shows that although the ultrasonic method has advantages in principle compared with other detection technologies, it is difficult to complete the detection of grouting density based on the conventional ultrasonic detection defect method, and it is necessary to explore new ultrasonic detection technology methods

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