Device and method for acoustic wave reflection detection of geological defects in pile hole base

Abstract

The invention discloses a device and method for detecting pile hole base geological flaws through sound wave reflection. The device includes a sound wave transmitting and receiving terminal, a sound wave detector, sound wave receiving cables and sound wave transmitting cables; the sound wave transmitting and receiving terminal comprises a bottom plate, sound wave receivers and sound wave transmitters, a hollow groove is arranged on the bottom plate, at least one sound wave receiver and one sound wave transmitter are arranged in the hollow groove, the sound wave receivers are connected with the sound wave detector through the sound wave receiving cables, and the sound wave transmitters are connected with the sound wave detector through the sound wave transmitting cables. The method includes the steps of connection of the device, adjustment of the length of the bottom plate, detection of the pile hole base, sound wave reflection migration imaging processing and sound wave reflection synthesis structure chart interpretation. The device and method for detecting pile hole base geological flaws through sound wave reflection are suitable for both manual hole digging and mechanical formation of holes filled with muddy water, and solve the problem of personnel construction safety and the problem that mechanical pile holes are filled with water and cannot be detected.

Description

technical field [0001] The invention belongs to the technical field of engineering geological exploration, and relates to a device and method for acoustic wave reflection detection of pile hole base geological defects. Background technique [0002] The foundation pile is the main structure of the building foundation. During the construction of the foundation pile, after the excavation of the pile hole and before the concrete pouring, it is necessary to detect the geological defects within a certain range at the bottom of the pile hole to confirm that the ground at the bottom of the pile meets the design requirements. The current detection method mainly uses the drill rod to carry out manual exploration, and also uses the geological radar method for detection. The disadvantage of these two methods is that they are only suitable for manual hole-digging piles, and cannot be used for mechanical hole-forming piles filled with muddy water. At present, due to the shortcomings of th...

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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a device for acoustic wave reflection detection of geological defects in the base of pile holes. The device is suitable for measuring pile holes with any diameter. The mechanical hole-forming pile of water solves the hidden safety hazards and low work efficiency of the manual hole-digging pile construction process. Generally, the pile hole is filled with muddy water after the hole is formed in the mechanical hole-forming construction, which overcomes the prohibition of personnel entering the pile hole and cannot Insufficient detection

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