A method for detecting the fullness of sleeve grouting based on core drilling

Abstract

The invention relates to a detection method for sleeve grouting fullness based on core drilling pore forming. The method comprises the following steps: S1, calibrating the circle center of a groutinghole, and measuring the inner diameter of a grouting hole; S2, performing core drilling pore forming; S3, making a probe of an endoscope measuring device extend into a sleeve along a core drilling pore forming path; S4, opening an endoscope, measuring the depth of a slurry interface relative to the lower edge position of the core drilling pore forming path on one side with a grouting hole on the sleeve through a double objective lens, measuring three different locations, calculating the average depth value of the measured three locations, and marking as x; and S5, grouting fullness calculation: marking the depth of the highest anchorage length of a reinforcing bar relative to the lower edge position of the core drilling pore forming path as y, wherein if the highest anchorage length is lower than the lower edge position of the core drilling pore forming path, y is a positive value, otherwise y is a negative value, and the grouting fullness is calculated according to the formula P=[8d-(x-y)] / (8d)x100%. The method is simple and feasible, does not need any detection element to be embedded in advance, is suitable for various types of prefabricated parts, and can quantify the fullness of sleeve grouting.

Description

technical field [0001] The invention relates to a method for detecting the fullness of sleeve grouting based on core drilling and hole forming, and belongs to the field of construction quality detection of prefabricated concrete buildings. Background technique [0002] Rebar sleeve grouting connection is the main connection method for assembling integral concrete structural members, and it is widely used in our country at present. A large number of actual engineering investigations have shown that due to the untimely sealing of the grouting holes or the leakage of grout at the bottom joints of prefabricated components, there are different degrees of backflow of the slurry in some sleeves, and the backflow of slurry will lead to insufficient grouting of the sleeves. The specific performance is that the slurry inside the sleeve in the vertical state falls directly, and the liquid level may be lower than the height required by the current national standard for the minimum ancho...

AI Technical Summary

Problems solved by technology

The pre-embedded component method requires pre-embedded detection components, which cannot be detected for the built ones; the X-ray flaw detection method has high requirements for on-site safety protection measures, and has strict restrictions on the thickness of the components to be inspected and the layout of the sleeves.

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