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Abstract

To solve the problem of grouting quality detection of prestressed pipe bellows, this paper proposed a method for detecting the density of bellows based on the piezoelectric ceramic fluctuation method. Meanwhile, it experimentally designed a concrete specimen with bellows and prestressed reinforcement, and monitored and studied the grouting density by adopting the piezoelectric fluctuation method. An embedded piezoelectric driver was fixed on the prestressed reinforcement to emit signals, and three piezoelectric ceramic PZT pieces were arranged on the upper and lower surfaces of the bellows to receive signals. Four working conditions were designed for the experiment, including 0%, 50%, 90% grouting, and full grouting. Additionally, time-domain analysis and wavelet packet energy analysis methods were utilized to determine the grouting density of bellows. Based on the experiment in this paper, it can be concluded that as the experiment progresses, the grouting degree of the bellows increases, with the continuously increasing signal amplitude. This means the smaller grouting density of the bellows leads to the smaller time-domain signal amplitude and wavelet packet energy value.

Publication Date

8-18-2022

DOI

10.14048/j.issn.1671-2579.2022.04.021

First Page

118

Last Page

121

Submission Date

May 2025

Reference

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