A preparation method of endoscopic tunnel for sleeve grouting connection construction quality inspection

Abstract

The invention discloses an endoscopic tunnel preparation method for the quality inspection of sleeve grouting connection construction. First, the position of the sleeve in the horizontal direction is positioned and the vertical line of the horizontal position of the sleeve is drawn, and a steel bar scanner is used to scan the inspected sleeve. Accurately locate the horizontal position of the sleeve, locate at least 2 points in the vertical direction, connect them into a straight line, mark the straight line as the vertical line of the horizontal position of the sleeve, and then perform positioning in the vertical direction on the vertical line of the horizontal position of the sleeve to determine The drilling position is marked, and the hole is drilled at the drilling position to make an endoscopic inspection channel; finally, an endoscope is used to detect in the endoscopic inspection channel and the construction quality result is obtained. The invention can quickly and accurately locate the position of the rotating hole, and can drill the hole efficiently and safely, thereby greatly improving the accuracy of the detection result.

Description

technical field [0001] The invention relates to the technical field of prefabricated building detection, in particular to a method for preparing an endoscopic channel for the construction quality detection of sleeve grouting connections. Background technique [0002] Prefabricated buildings have the advantages of high level of industrialization, fast installation and construction, reduced labor costs, energy saving and environmental protection, etc., and have developed rapidly in China. In prefabricated concrete structures, component connection is a key factor related to the overall quality of the structure. The steel sleeve grouting connection is a common form of steel bar connection, and its connection quality mainly depends on the effective anchorage length of the steel bar. In engineering, the problem of insufficient effective anchorage length of the steel bars in the sleeve is mainly caused by the substandard grouting fullness. Therefore, the detection of the grouting ...

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Problems solved by technology

[0005] But in practical application, there are following problems: 1. Usually, steel ruler is used to measure the corresponding distance from the floor to determine the drilling position, and the position must be accurately positioned in the sleeve cavity above the design anchoring length of the steel bar.

However, due to the unevenness of the floor and the large construction deviation of the thickness of the bottom joint, there is a certain deviation in the measurement positioning with the floor as the reference point, which often makes the position of the drill hole incorrect, which cannot be used to detect the fullness of the grout or cause the detection The results resulted in deviations and misjudgments; 2. The concrete protective layer on the outside of the damaged sleeve needs to be damaged, which has certain damage to the structure and needs to be repaired after the inspection is completed; 3. The position of the grout outlet and grouting port on the surface of the prefabricated component is not where the sleeve is located The horizontal position, the deviation may even exceed 50mm, therefore, if the concrete is damaged with the grout channel as the reference point, the sleeve may not be found, or the sleeve must be damaged in a larger range, which seriously affects the detection efficiency

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