Method for detecting quality of grouting of sleeve of prefabricated concrete structure

Abstract

The invention relates to a method for detecting the quality of grouting of a sleeve of a prefabricated concrete structure. The method comprises the steps that before a grouting procedure, a guiding pipe with the depth enabling the guiding pipe to achieve the inner wall of the sleeve is inserted in to a gout outlet pipeline of the sleeve, the guiding pipe is pulled out after a grouting material isfinal set, when the guiding pipe is pulled out, if a hollow cavity is formed in the guiding pipe by visual inspection, that is, the grouting material in the horizontal guiding pipe and the grouting material in the vertical sleeve are discontinuous, and the condition that grouting of the sleeve is not full; and otherwise, if a breaking-off surface of the end part of a horizontal section of the guiding pipe and the grouting material of the inner wall of the sleeve can be seen, the grouting material in the guiding pipe is full; and the solid grouting material in the guiding pipe is taken out to be made into a cylinder test piece, the curl frequency and the distortion frequency of the test piece are measured, a young modulus E<d>, a shear modulus G<d> and a poisson ratio mu are acquired, and dynamic elasticity modulus data is obtained to estimate the strength and material of the grouting material. The method detecting the quality of grouting of the sleeve of the prefabricated concrete structure has randomness, the adaptability is high, the cost is low, population is easy, rapidness and high efficiency are achieved, the connecting part of grouting of the sleeve cannot be damaged, and comprehensive, objective and precise reference is provided for quality detection of actual grouting construction.

Description

[technical field] [0001] The invention relates to the technical field of construction engineering quality inspection, in particular to a method for inspecting the grouting quality of a prefabricated concrete structure sleeve. [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 less wet work. Grouting sleeve connection is one of the main connection methods of steel bars in prefabricated concrete structures at present. This technology realizes steel bar connection through special grouting sleeves and high-strength non-shrinkage grouting materials. It has the advantages of simple force, small additional stress, and wide application range. Advantages, or will become the mainstream direction of the development of the construction industry at home and abroad. [0003] In recent years, many professionals have...

AI Technical Summary

Problems solved by technology

Among them, the biggest problem with the pre-embedded detection method is that it is impossible to carry out random sampling inspection on the project, so that the parts where the embedded parts are set can be finely constructed, and the quality of other parts is more likely to lose control.

The currently developed and applied detection methods for grouting fullness have their own limitations in terms of use conditions, detection accuracy, and convenience.

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