A method for detecting the insertion depth of connecting steel bars in half-grouting sleeve steel bar joints

Abstract

The invention discloses a method for detecting the insertion depth of a connecting steel bar in a semi-grouting sleeve steel bar joint. A three-dimensional measurement endoscope, a rigid sleeve pipe and a rubber plug. The three-dimensional measurement endoscope comprises an endoscope host, a connection hose, a probe and lenses connected in sequence, and the lenses comprise a front-view three-dimensional measuring lens and a side-view three-dimensional measuring lens. A central hole is arranged in the middle of the rubber plug, and the rigid sleeve can be inserted into the rubber plug through the central hole. The relative position of an end of an inserted section of the connecting steel bar and the bottom of a sleeve grout discharging port is judged by using an auxiliary tool. When a judgment result is that the end of the inserted section of the connecting steel bar is above the bottom of the sleeve grout discharging port, the front-view three-dimensional measuring lens is used to measure and calculate to obtain a result, and when the judgment result is that the end of the inserted section of the connecting steel bar is under the bottom of the sleeve grout discharging port, the side-view three-dimensional measuring lens is used to measure and calculate to obtain a result. According to the method, the insertion depth of the steel bar can be intuitively, clearly and quantitatively obtained, and the detection efficiency is improved.

Description

technical field [0001] The invention relates to the field of prefabricated buildings, in particular to a method for detecting the insertion depth of a connecting steel bar in a semi-grouting sleeve steel bar joint. 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 refers to the rebar butt joint connection method realized by inserting rebar into the pre-embedded metal sleeve in...

AI Technical Summary

Problems solved by technology

However, due to component production or on-site installation deviations, the lower connecting steel bars cannot be placed in place, and some of the lower connecting steel bars are cut short or cut off, which reduces the effective anchorage length of the steel bars, resulting in the strength of the steel sleeve grouting connection joints failing to meet the requirements. There are security risks

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