Ultrasonic probe introduction and coupling device, rock mass acoustic wave detection device and method

Abstract

The invention relates to an ultrasonic probe automatic leading-in and coupling device and a rock mass sound wave detection device and method. The coupling device comprises a first sealing mechanism and a second sealing mechanism which can be respectively arranged at two ends of the ultrasonic probe, the first sealing mechanism and the second sealing mechanism each comprise an annular walking discand a fixing disc capable of being connected with the end of the ultrasonic probe in a sealed mode. The walking disc and the fixed disc are connected through a first telescopic piece. The distance between the walking disc and the fixed disc can be adjusted through the first telescopic piece; a plurality of telescopic supporting arms are arranged on the outer peripheral surface of the walking disc;acting force in the radial direction of the walking disc can be applied to the wall of the drilled hole; a sealing tire is arranged between the walking disc and the fixed disc; movement of the walking disc towards the fixed disc can drive the sealing tires to generate compression movement in the axial direction and expansion movement in the radial direction, the sealing disc of the first sealingmechanism can be connected with a water injection pipe, the water injection pipe is used for injecting water into the space between the two sealing tires, and the device is accurate in detection result and low in water resource consumption.

Description

technical field [0001] The invention relates to the technical field of rock mass acoustic wave detection, in particular to an ultrasonic probe introduction and coupling device, a rock mass acoustic wave detection device and a method. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] With the continuous deepening and development of infrastructure, more and more mountain-crossing tunnels have been put on the agenda. These tunnels often pass through complex stratum environments. In order to carry out safe and efficient construction, it is necessary to understand the quality of the rock mass in the area where the tunnel passes. Rock mass acoustic testing has been widely used as an effective engineering method. Rock mass acoustic testing is based on the correlation between the propagation characteristics of sound waves in rock mass and the physical and m...

AI Technical Summary

Problems solved by technology

For the plane probe, although the probe surface and the rock mass test surface are flat, in fact there are countless unevennesses on the rock mass and the probe surface that cannot be observed by the naked eye, and there is air in them. If the test is carried out directly, the ultrasonic energy will be absorbed by these surfaces. The air absorption attenuation in the concave and convex parts of the rock mass greatly affects the ultrasonic penetration ability, so butter, vaseline and other pastes must be used to fill the gap between the rock mass test surface and the probe contact surface to form a good coupling

For the cylindrical radial probe, water is used for coupling, which is good for vertically downward or obliquely downward drilling, but the inventor found that if the vertically upward or obliquely upward drilling cannot be coupled with water

Moreover, the coupling of irrigation and water requires large-scale water transfer, which wastes a lot of water resources and takes a long time for irrigation. Considering that there are often many cracks in the drilling holes of the rock mass, water will be lost through the cracks, which will affect the coupling effect.

And because the ultrasonic velocity and impedance of water are much greater than that of air, compared with air, the ultrasonic wave propagates at a higher speed in water and has less attenuation. Water short circuit”, resulting in difficulty in defect identification

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