A method for judging no grouting at the measuring point based on the ultrasonic reflection on the surface of the sleeve

An ultrasonic and measuring point technology, which is applied in the analysis of fluids using sonic/ultrasonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, and measuring devices, etc. Achieve the effect of low cost, fast detection speed and high efficiency

Active Publication Date: 2020-11-17
KUNSHAN CONSTRUCT ENG QUALITY TESTING CENT +2
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Problems solved by technology

In addition, the inner cavity of the sleeve has a complex structure. In order to enhance the mechanical engagement and friction between the grouting material, the steel bar and the sleeve, the inner cavity of the sleeve is provided with a reinforced rib every certain distance, which also increases the difficulty of detection and judgment.

Method used

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  • A method for judging no grouting at the measuring point based on the ultrasonic reflection on the surface of the sleeve
  • A method for judging no grouting at the measuring point based on the ultrasonic reflection on the surface of the sleeve
  • A method for judging no grouting at the measuring point based on the ultrasonic reflection on the surface of the sleeve

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0044] An embodiment of the method of judging no grouting at the measuring point based on the ultrasonic reflection on the surface of the sleeve of the present invention:

[0045] The phenomenon of reflection and transmission will occur when the ultrasonic wave passes through different media during the propagation process. When the ultrasonic wave passes through the inner wall of the sleeve and the air interface, due to the large difference in the acoustic impedance of the two media, the reflected wave is relatively strong. In actual operation The signal obtained in the medium is stronger, which is convenient to obtain the characteristic signal and perform data processing; when the...

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Abstract

The invention discloses a method for determining no grouting at a measuring point based on ultrasonic reflection of a sleeve surface. Firstly, a parallel member embedded with a non-grouted sleeve is prepared; then, the non-grouted sleeve is subjected to measuring point marking and measuring point attenuation coefficient measurement, and an attenuation coefficient range in the non-grouted sleeve isobtained; afterwards, the grouted sleeve in the engineering is subjected to measuring point marking and measuring point attenuation coefficient measurement; and the data of the measuring point of thegrouted sleeve and the attenuation coefficient range are compared to obtain a conclusion whether there is grouting or not. According to the method for determining no grouting at a measuring point based on ultrasonic reflection of a sleeve surface in the invention, it is judged whether the interior of the sleeve at the measuring point is grouted or not according to the attenuation coefficient of wave amplitude obtained through reflected wave signal fitting; the detection speed is fast, the efficiency is high, the precision is high, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of prefabricated buildings, in particular to a method for judging no grouting at a measuring point based on ultrasonic reflection on the surface of a sleeve. Background technique [0002] Prefabricated buildings refer to the production of some or all of the components and parts of the building in the prefabricated factory, and then transported to the construction site, using reliable connection methods and installation machinery to assemble the components to form a building with design and use functions. Compared with the construction of cast-in-place structures, prefabricated structures have the advantages of convenient construction, fast project progress, little impact on the surrounding environment, and easy guarantee of the quality of building components. Prefabricated structures are widely used in industrial buildings in my country, and have been vigorously promoted and applied in civil buildings, espec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/02
CPCG01N29/022G01N2291/024
Inventor 潘永东顾盛童寿兴孙彬宋潮张军
Owner KUNSHAN CONSTRUCT ENG QUALITY TESTING CENT
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