Method for detecting fullness of sleeve grouting based on three-dimensional dimensional measurement technology of endoscope

Abstract

The invention discloses a method for detecting fullness of sleeve grouting based on three-dimensional dimensional measurement technology of endoscope. The device comprises a rubber plug, a film-coatedstraw, a rigid sleeve and a three-dimensional measuring endoscope. In the process of sleeve grouting construction, after a slurry channel flows out of the slurry, a detection duct is prepared by fitting the rubber plug and the film-coated straw with in the slurry channel. After the slurry is hardened, the rubber plug is pulled out and the straw is taken out from the film, the film is left in theslurry channel to form the detection duct, the length of the grouting defect is detected by the cooperation of the rigid sleeve and the three-dimensional measuring endoscope, and the grouting length is matched with the design anchor length of a connecting steel bar to obtain a grouting fullness ratio. According to the invention, the method has the advantages of low detection cost, convenient operation and high precision, and can observe and measure the grouting defects intuitively, clearly and quantitatively, and then calculate the grouting fullness.

Description

technical field [0001] The invention relates to the field of prefabricated buildings, in particular to a sleeve grouting fullness detection method based on an endoscope three-dimensional dimension measurement technology. Background technique [0002] As a structural form in line with industrial production methods, prefabricated concrete structures have the advantages of fast construction speed, low labor intensity, less noise pollution and wet work, and easy control of product quality. It has become the mainstream development direction of the construction industry at home and abroad. [0003] In prefabricated building structures, especially in prefabricated concrete structures, component connection is a key node to ensure the overall quality of the structure. Rebar sleeve grouting connection is a common form of rebar connection in prefabricated concrete structures. It is a rebar connection device composed of a specially designed columnar sleeve and non-shrinkage grouting mat...

AI Technical Summary

Problems solved by technology

In addition, although the endoscopic water injection method takes into account the influence of the uncertain volume of the grouting material in the grouting channel after the occurrence of grout leakage and grouting, the grouting material remaining on the inner wall of the sleeve and the surface of the steel bar in the grouting defect area affects the water injection volume. It cannot be ruled out, and it will still affect the detection accuracy in the end

[0007] In summary, the pre-embedded damping vibration sensor method and the pre-embedded steel wire drawing method have many problems such as high cost of embedded parts, inability to quantitatively detect the fullness of grouting, and possible misjudgment; the endoscopic inspection method after the pre-embedded steel wire is pulled out And the endoscopic water injection method by adding a detection port on the sleeve is only an indirect visual inspection of the grouting fullness using an observation endoscope, which can only qualitatively determine whether it is full, and cannot directly measure the size of the grouting defect area

In addition, it should be noted that in order to allow the endoscope to smoothly penetrate into the sleeve, in terms of the reserved hole forming process, the steel wire drawing method also has the disadvantages of expensive embedded parts, and the steel wire is easily disturbed or damaged before the wire is pulled out. In the end, there are shortcomings such as the inability to form holes smoothly; the method of adding a detection port above the grout outlet of the semi-grouting sleeve to form a detection channel changes the original structure of the sleeve and increases the production cost of the sleeve to a certain extent

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