Non-destructive testing method for grouting of prefabricated column sleeves based on elastic wave and machine learning

Abstract

The invention discloses a non-destructive testing method for grouting of prefabricated column sleeves based on elastic wave and machine learning. An analysis model is obtained by use of impact elasticwave as a testing medium and use of picked signal characteristics combined with the machine learning, and grouting compactness of the sleeves is tested; by using of spectrum characteristics, attributes are established for the machine learning; for each tested sleeve, sound parts are acquired as benchmark parameters to reflect mechanical properties of concrete; non-grouted and fully-grouted sleeves are tested under various structural thicknesses and various working conditions, a training set is established for the machine learning by analyzing of the characteristic attributes of signals, and an analysis model is obtained; the analysis model is used to analyze test data, and analysis results are verified; and the data and verification results are made into examples, and the examples are supplemented into the training set to optimize the analysis model and improve the accuracy, so that the detection system participates in target analysis with more parameters, is accurate in judgement, high in automation, and wide in range of application, and the detection process is concise and clear.

Description

technical field [0001] The invention relates to a nondestructive detection method, in particular to a nondestructive detection method for prefabricated column sleeve grouting based on elastic waves and machine learning. Background technique [0002] Prefabricated concrete structure (referred to as PC, Prefabricated Concrete) is a concrete structure formed by prefabricated concrete components as the main component, assembled, connected, and partially cast in place. In today's world construction field, PC engineering is widely used overseas as an emerging green, environment-friendly and energy-saving building. my country has also made considerable progress in recent years. In particular, the Ministry of Housing and Urban-Rural Development promulgated the "Technical Regulations for Prefabricated Concrete Structures" (JGJ1-2014) in 2014, marking that this field has entered a period of rapid development in my country. [0003] Among them, the steel sleeve connection and the grou...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that it is very difficult to detect the fullness of the sleeve grouting material, the detection cost is high, and it is not easy to be practically applied. The present invention provides a prefabricated column sleeve based on elastic waves and machine learning to solve the above problems Non-destructive testing method for barrel grouting

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