Device and method for ultrasonic testing of corrugated pipe duck grouting compactness

Abstract

The invention discloses a device and a method for ultrasonic testing of corrugated pipe duck grouting compactness. The device comprises a transmitting transducer, a plurality of receiving transducers, a signal acquisition module and a signal processing and display module, wherein the transmitting transducer is excited by a signal excitation module to generate ultrasonic signals, the plurality of the receiving transducers are arranged in a cross array, the signal acquisition module acquires signals, and the signal processing and display module performs processing and waveform display on acquired signals. The method includes determining an arrival time curve of waveforms received at different positions of a scattering sound field, extracting some waveforms through a window function from array measurement waveforms with the curve serving as a standard, calculating correlation coefficients and changing curves of the correlation coefficients along with medium sound velocities, corrugated pipe diameters and time, forming an image, and determining grouting defects of corrugated pipes through the image. The device and the method are simple and practical, applicable to rapid detection on the construction site, particularly applicable to construction quality on-site determination and bridge daily testing and maintenance in a bridge construction process, and accurate, visual and reliable in cavity position determination.

Description

technical field [0001] The invention discloses a device and method for detecting the grouting compactness of corrugated pipes based on ultrasonic waves, and belongs to the technical field of ultrasonic detection and analysis. Background technique [0002] With the rapid development of bridge construction in China, bellows prestressed concrete structures have been widely used, and the grouting quality of bellows channels has always been a concern of people. The grouting density of bellows is related to the bearing capacity of steel strands. It is of great significance to evaluate the grouting compactness of bridge bellows. [0003] In the current grouting construction of corrugated pipes, there are often quality problems such as grouting is not dense, there are gaps, and the tunnel is not completely filled with cement slurry, which leads to frequent quality and safety accidents. Similar accidents have attracted strong attention from the engineering community. [0004] At pre...

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Problems solved by technology

However, this method is an empirical judgment method, which is prone to more errors and missed judgments due to the influence of on-site detection conditions, so this method is rarely used

[0008] Although the above two methods can achieve the purpose of detection to a certain extent, they cannot achieve the purpose of accurate measurement.

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