A method for detecting the insertion depth of connecting steel bars in fully grouted sleeve steel bar joints

Abstract

The invention discloses a method for detecting the insertion depth of a connecting reinforcement in a full grouting sleeve reinforcement joint. The method is characterized in that a three-dimensionalstereoscopic measuring endoscope is used for detecting the insertion depth of the connecting reinforcement joint in the full grouting sleeve, involving the reinforcement at a grouting inlet end and ata grouting outlet end, and the detecting time is after the on-site splicing of a prefabricated member and before the construction of the sleeve grouting; an endoscope probe provided with a forward-looking three-dimensional measuring lens is protruded from a grouting opening and a grouting outlet in the surface of the prefabricated member, and the guiding bending function of the endoscope probe and a gap between the connecting reinforcement and the inner wall of the sleeve are utilized to protrude the endoscope probe into the sleeve to shoot a 3D image of the middle part of an inner cavity ofthe sleeve. By measuring the relative distance between the tail end of an insertion section of the connecting reinforcement in the 3D image and a limiting stopper in the middle of the sleeve, the characteristic of high precision of sleeve production and manufacturing is used to calculate the insertion depth of the connecting reinforcement. The method can be used for visually, clearly and quantitatively obtaining the insertion depth of the reinforcement and improving the detection efficiency.

Description

Technical field [0001] The invention relates to the field of prefabricated construction, in particular to a method for detecting the insertion depth of connecting steel bars in a full grouting sleeve steel bar joint. Background technique [0002] As a structural form that conforms to the industrial production mode, prefabricated concrete structure has 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 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 commonly used form of rebar connection in prefabricated concrete structures. It refers to a rebar butt connection method realized by inserting rebar in a metal sleeve embedded in a precast concrete com...

AI Technical Summary

Problems solved by technology

However, due to component production or on-site installation deviations, the grouting end connecting steel bars cannot be placed in place, and some of the grouting end connecting steel bars are cut short or cut off, which reduces the effective anchorage length of the steel bar, resulting in the strength of the steel sleeve grouting connection joint. Less than required, there is a security risk

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