桩内单孔管波法检测理论及其应用 English Version
Theoretical and Practical Application of Tube Seismic Method for Pile Integrity Testing
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摘要: 近年来，一种单孔管波法可以通过竖向激振作用下桩内声测管中的水压响应时深规律来判断桩身完整性，但是该方法的检测理论尚不完善。因此，本文拟提出一种桩周土-桩-测管内流体耦合振动模型，结合桩身三维振动控制方程以及Biot流体位移势函数控制方程，求解得出测管中不同深度处的水压响应表达式。本文解得桩身振动响应与退化工况下的已有解几乎一致。基于验证后的解析解，开展测管中水压传播机理的研究。通过水压响应波列图，可观察到管中水压以两种波速进行传播，管中的水压响应是应力波沿桩身传播与管波在测管内传播共同作用的结果。对不同工况下的土-桩-测管系统进行参数分析，研究水压响应的影响因素。结合现场试验结果，证明了单孔管波法进行桩基完整性检测的合理性与有效性。本文研究结论能为单孔管波法检测技术的推广应用提供工程指导以及理论依据。Abstract: In recent years, a tube seismic method has been proposed to assess pile integrity by analyzing the water pressure response at different depths within the tube under vertical excitation. However, the theoretical framework for this method remains underdeveloped. Therefore, this paper aims to propose a coupled vibration model between the pile surrounding soil, pile, and fluid in-tube. By combining the three-dimensional vibration governing equations of the pile with Biot’s fluid potential function, the expression for the water pressure response at different depths is derived. The dynamic response of the pile obtained in this study is nearly identical to the existing solutions under degenerated conditions. Based on the verified analytical solution, this study investigates the water pressure propagation mechanism in the tube. It can be observed that the water pressure in the tube propagates at two different speeds, which results from the combined effects of both stress wave propagation along the pile body and Stoneley wave propagation within the tube. Parametric analysis of the soil-pile-fluid in tube system under different conditions is conducted to investigate the factors influencing the water pressure response. The field test results demonstrated the feasibility of the tube seismic method and provided theoretical support for the application in the pile integrity test.
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Keywords:
- pile foundation /
- tube seismic method /
- dynamic response /
- analytic solution /
- Stoneley wave
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期刊类型引用(2)
1. 张雄辉，黄孝福，黄诗渊，刘发贵，聂亮冰，黎子玄. 压剪条件下裂缝开闭对准脆性材料断裂行为的影响机制研究. 中国农村水利水电. 2025(03): 128-135 . 
百度学术
2. 范钢伟，范张磊，张东升，张世忠. 不同加载角压剪耦合作用下岩石强度与渗透性演变特征. 煤炭学报. 2024(07): 3090-3101 . 百度学术
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