Auto-coupling acoustic wave test system and acoustic wave test method

Abstract

The invention provides an auto-coupling acoustic wave test system and an acoustic wave test method. The auto-coupling acoustic wave test system mainly comprises two parts including an acoustic wave test device and a water injection and pressurization device, wherein the acoustic wave test device comprises an acoustic wave probe (1), one end of the acoustic wave probe (1) is provided with a water inlet connector (13), the water inlet connector (13) is provided with a water inlet hole (7), an acoustic wave signal cable channel hole (8) and a push rod connecting bolt (14), and the other end of the acoustic wave probe (1) is provided with a fixed short rod (4), and is characterized in that the acoustic wave test device also comprises a flexible weakly permeable bag (2) sleeving the outside of the acoustic wave probe (1), and comprising a sealing section and a working section. Since the flexible weakly permeable bag is adopted, the flexibility can ensure that one type can adapt to bore diameters of different sizes. The weak permeability eliminates the need of exhaust vents at the end part, can ensure the position between a working section bag and a hole wall is filled with water, and can effectively ensure the coupling of the probe in a test section and the hole wall.

Description

technical field [0001] The invention belongs to a system and a sound wave testing method which can conveniently carry out sound wave testing in boreholes. As long as the hole diameter is sufficient enough to fit a test probe, it can be applied to all boreholes that cannot be guaranteed to be filled with water during testing. Background technique [0002] Acoustic wave testing is one of the elastic wave testing methods. Its theoretical basis is based on the propagation theory of elastic waves in solid media. Receive the sound wave of the physical characteristics of the medium at a certain spatial distance, and detect the relevant characteristics of the medium (rock, rock mass, concrete structure) by observing and analyzing the acoustic parameters such as the propagation velocity, amplitude, and frequency of the sound wave in different media. Acoustic testing technology has the advantages of wide application, strong practicability, and no damage to engineering buildings. It is...

AI Technical Summary

Problems solved by technology

This method can solve the problem to a certain extent, but the work practice shows that the monitoring effect is not ideal. It will be completely lost; and the enhanced receiving signal is easily interfered by background noise

The second way is to start with the coupling between the acoustic wave probe and the hole wall. There is an orifice sealing method. The starting point is to form a closed space in the hole, and the purpose is to ensure that the injected water fills the test hole. In this method, the orifice sealing equipment is fixed. , it is extremely inconvenient to move the sonic probe when it is necessary to perform sonic tests on multiple parts in one hole. It is necessary to increase the amount of water injection, otherwise it is difficult to ensure that the water in the hole is full

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