Supplementary filling treatment method for sleeve grouting defect under bent-pipe-shaped slurry outlet hole channel

Abstract

The invention discloses a supplementary filling treatment method for a sleeve grouting defect under a bent-pipe-shaped slurry outlet hole channel. The method comprises the steps that the projection position of a sleeve on the surface of a component is positioned, and an air exhaust hole channel is drilled in the projection position 5-10mm below a slurry outlet of the sleeve; the position of the upper surface of a grouting material in the sleeve is determined through grouting fullness detection, and a grouting hole channel is drilled in the position above the upper surface of the grouting material; the air exhaust hole channel is reamed, and an L-shaped external extension pipe is mounted; a grouting pipe is inserted into the outer wall of the sleeve through the grouting hole channel and is in butt joint with the drilling position of the wall of the sleeve; and an air exhaust pipe is inserted into a port of a vertical section of the L-shaped external extension pipe, slurry supplementary filling is started, and supplementary filling is completed. According to the supplementary filling treatment method, damage to the sleeve is small, and the supplementary filling treatment effect is excellent.

Description

technical field [0001] The invention relates to the technical field of prefabricated buildings, in particular to a method for refilling and treating sleeve grouting defects when the grout outlet channel is an elbow. Background technique [0002] 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 material as a binder. In order to ensure that the effective anchorage length of the steel bar meets the design requirements, the grouting material inside the sleeve must be fully filled. However, sometimes due to factors such as insufficient pressure holding before the end of grouting, untimely sealing of the grouting opening at the end of grouting, and ...

AI Technical Summary

Problems solved by technology

Regardless of whether X-ray method or endoscopic method is used for inspection, when grouting defects are found, it is impossible to carry out grouting according to the method when the grouting channel is straight

The reasons are as follows: 1. In order to reduce the damage to the sleeve, it is not advisable to open a rear opening larger than 6 mm at the same section height of the sleeve wall. Due to the limitation of the diameter of the hole, it is impossible to arrange the grouting pipe at the same time ( The outer diameter is usually 6mm, the wall thickness of the pipe is 1mm) and the exhaust pipe (the outer diameter is usually 4mm, the wall thickness of the pipe is 1mm); 2. Even if the opening of the sleeve wall is not considered In case of damage, a rear opening with a diameter capable of accommodating the grouting pipe and the exhaust pipe is opened under the grouting outlet of the sleeve. According to the grouting method when the grouting hole is straight, the grouting material after grouting is at most only It can reach the height of the upper edge of the rear opening, and there is still a little gap from the full grouting of the sleeve

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