Preparation method of endoscopic hole channel for sleeve grouting connection construction quality detection

Abstract

The invention discloses a preparation method of an endoscopic hole channel for sleeve grouting connection construction quality detection, which comprises the following steps of: positioning a sleeve in the horizontal direction, drawing a vertical line of the horizontal position of the sleeve, accurately positioning the horizontal position of the detected sleeve by adopting a steel bar scanner, positioning at least two points in the vertical direction, connecting the two points into a straight line, marking the straight line as a horizontal position vertical line of the sleeve, then, positioning the position in the vertical direction on the horizontal position vertical line of the sleeve, determining and marking a drilling position, performing drilling at the drilling position, and manufacturing an endoscopic detection hole channel; and finally, adopting an endoscope for detection in the endoscopic detection hole channel to obtain a construction quality result. According to the invention, the drilling position can be rapidly and accurately positioned; efficient and safe drilling can be achieved; and the precision of a detection result is greatly improved.

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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