Dry and wet elastic wave hole bottom cave and subterranean cavitation detection device and method

Abstract

The invention discloses a dry and wet elastic wave hole bottom cave and subterranean cavitation detection device and method. The device comprises a probe; the probe comprises an elastic wave emittingassembly, multiple receiving transducer assemblies distributed on the outer circumference of the elastic wave emitting assembly and a probe circuit board assembly; the elastic wave emitting assembly comprises a connecting cavity body, the upper part and the lower part of the connecting cavity body is provided with a circuit board cavity body and a seismic source; the circuit board cavity body is internally provided with the probe circuit board assembly; the seismic source is electrically connected with the probe circuit board assembly; each receiving transducer assembly comprises a sound wavereceiving transducer, a transducer height adjuster and a connecting pipe; one end of each connecting pipe is connected with the connecting cavity body and the other end is fixed with the correspondingtransducer height adjuster through a flange; a first damping pad is disposed between the two flanges; and the sound wave receiving transducer is electrically connected with the probe circuit board assembly. Full-area detection of the hole bottom cave in different environments can be realized; and through the contact stability between the probe and a detection surface and the signal reliability, the detection accuracy is improved.

Description

technical field [0001] The invention relates to the field of hole bottom karst cave detection, in particular to a wet and dry elastic wave hole bottom karst cave and underground cavity detection device and method. Background technique [0002] According to the requirements of the "Code for Geotechnical Engineering Survey" and other regulations, it should be found that there are no weak interlayers, fractured fracture zones and cave distribution within three times the pile diameter below the pile tip and not less than 5m, and the pile bottom stress range should be No free face of rock mass. For large-diameter rock-socketed piles of single piles, it should be checked whether there are unfavorable geological conditions such as soil caves, karst caves, broken zones or weak interlayers within the range of 3 times the pile body diameter or 5m depth below the lithology testing hole. [0003] At present, the method of advanced drilling at the bottom of the pile is mostly used in en...

AI Technical Summary

Problems solved by technology

However, in the detection process of this invention, water needs to be poured at the bottom of the pile, and the sonar detection probe is soaked in the water layer to realize the detection, and the use has limitations; at the same time, the probe detection process does not have a shock-absorbing structure, which will affect the probe detection data. the accuracy of

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