Automatic excitation hammer for side-hole transmission wave method pile foundation detection

By designing an automatic vibratory hammer, the problems of uneven vibration wave transmission intensity and detection errors were solved, enabling accurate detection of pile foundation depth and improving the reliability and accuracy of the detection results.

CN117306611BActive Publication Date: 2026-07-24HEFEI GONGDA ENG TESTING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI GONGDA ENG TESTING CO LTD
Filing Date
2023-11-03
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In the side-hole transmission wave method for pile foundation testing, the different striking force of the vibrating hammer leads to uneven vibration wave transmission intensity, affecting the accuracy of the test. Furthermore, the detector's ability to receive vibration waves is weakened, resulting in increased error in pile foundation depth detection.

Method used

An automatic vibration hammer was designed. The hydraulic system control rod drives the turntable and connecting part to move up and down reciprocally. The vibration hammer vibrates up and down to generate vibration waves. Combined with the verticality correction of the balance plate and the detection cylinder, the vertical installation of the detection cylinder is ensured. The vibration wave response is enhanced by injecting clean water. The excitation force is adjusted by using the modified weight cavity to achieve uniform reception of vibration waves and accurate detection of inflection points.

Benefits of technology

This improved the accuracy and precision of pile foundation depth detection, reduced vibration wave reception errors, and ensured the reliability and dependability of the detection results.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117306611B_ABST
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Abstract

The application discloses an automatic excitation hammer for pile foundation detection by the side-hole transmission wave method and relates to the technical field of pile foundation detection. The automatic excitation hammer comprises a stratum, a detection cylinder arranged on the stratum, a pile foundation arranged in the stratum, a building outer wall arranged on the pile foundation, an excitation hammer for hammering the building outer wall to generate vibration waves of the pile foundation, the excitation hammer and the building outer wall being arranged vertically, and an excitation unit arranged on one side of the excitation hammer, a detection table arranged on the stratum, and an oscilloscope arranged on the detection table. After correction formula calculation, the pile depth corresponding to the inflection point vertical coordinate on a time-pile depth broken line graph is the actual pile depth of the detected pile foundation, so that the depth detection of the pile foundation is completed. Meanwhile, the wave velocity obtained by the straight line slope above and below the inflection point on the time-pile depth broken line graph can also be used to analyze the pile body material and the properties of the soil layer below the pile bottom, respectively.
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