Tunnel lining non-destructive testing method based on audio frequency analysis

Abstract

The invention relates to the technical field of road engineering quality detection, in particular to a tunnel lining non-destructive testing method based on audio frequency analysis, which aims to provide an efficient and accurate non-destructive testing method for tunnel linings. The technical solution adopted is as follows: the following steps are included: acquiring a tunnel lining tapping audio signal at a given sampling frequency by using a mobile terminal with a recording function; trimming the tapping audio signal to retain an effective signal; calculating a calibration threshold according to the effective signal parameters; calculating a test point void index according to the effective signal parameters; comparing the void index with the calibration threshold; and determining the tunnel lining quality according to the comparison result. The invention can carry out non-destructive testing on the surface defects of the lining, and has the characteristics of convenience, high efficiency and accuracy.

Description

technical field [0001] The invention relates to the technical field of road engineering quality detection, in particular to a nondestructive detection method for tunnel lining based on audio frequency analysis. Background technique [0002] In construction projects, the use of concrete is essential, especially in existing buildings, where most structural beams, columns, piers, piles, etc. need to be used. Therefore, the quality of concrete directly affects the durability and safety of building structures. Especially for tunnel engineering, the quality of concrete restricts the economic and social benefits of tunnel engineering. If the construction technology is not standardized, the process is not strict or the management is improper, the thickness of the tunnel lining will be insufficient, the contact between the lining and the surrounding rock will not be dense, and there will be safety problems such as voids, deformation and cracks of the lining, water leakage, and even f...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the above-mentioned problems such as too high subjectivity, no quantitative standard, and low detection accuracy of the existing tunnel lining surface defect detection methods, the present invention proposes a nondestructive detection method based on audio frequency analysis, which can perform nondestructive detection of lining surface defects, and has the advantages of Convenient, efficient and accurate features

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