An acoustic wave reflection device and method for detecting geological defects of pile hole base

Abstract

The invention discloses an acoustic reflection device and method for detecting pile hole base geological flaws. The device comprises an acoustic detection device, an acoustic emission-reception terminal and a cable. The acoustic emission-reception terminal comprises a base and sensors. The base is provided with a hollow groove. At least two sensors are arranged in the hollow groove. Each one of the sensors comprises an independent acoustic emission-reception function. The sensors are connected to the acoustic detection device through the cable. The method comprises device connection, base plate length adjustment, pile hole base detection, acoustic reflection migration imaging processing and acoustic reflection composite structure diagram interpretation. The device and method are suitable for manual hole digging and mechanical hole digging in slush and solves the problems of personnel construction safety, detection infeasibility because of water filling the mechanical pile hole, large safety hidden trouble of a manual hole digging construction process and low work efficiency.

Description

technical field [0001] The invention belongs to the technical field of engineering geological exploration, and relates to an acoustic wave reflection device and method for detecting geological defects of pile hole bases. 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 ...

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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 in the construction process of manual hole-digging piles. Generally, the pile hole is filled with muddy water after the hole is formed in mechanical hole-forming construction, which overcomes the problem of prohibiting personnel from entering the pile hole. undetectable deficiency

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