应力波波形周期归一化方法及高应变基桩检测方法
By using an adaptive superposition method with frequency domain phase spectrum correction and matching degree weighting, the waveform periodic drift problem caused by cumulative deformation of the hammer pad was solved. This method effectively enhanced the waveform coherence and clearly identified the pile bottom reflection signal in the detection of high-strain foundation piles, thereby improving the signal-to-noise ratio and the accuracy of defect location.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA BUILDING MATERIAL TEST & CERTIFICATION GRP JIANGSU
- Filing Date
- 2026-04-28
- Publication Date
- 2026-07-17
AI Technical Summary
In the testing of high-strain foundation piles, the periodic drift of the stress wave waveform caused by the cumulative deformation of the hammer pad results in the inability of the waveform to be effectively coherently enhanced after multiple hammer blows, affecting the identification of the reflected signal at the pile bottom and the accurate determination of the defect location.
The period of stress wave is normalized by frequency domain phase spectrum correction, and the waveform period drift caused by cumulative deformation of the hammer pad is eliminated by adaptive superposition with matching degree weighting. The theoretical period calculated by pile length and stress wave velocity is used as the normalization benchmark, the waveform period is corrected by frequency domain interpolation, and the weighting coefficients are determined according to matching degree and signal-to-noise ratio for weighted superposition.
It effectively improves the signal-to-noise ratio of the superimposed waveform and the pile bottom reflection recognition rate, thereby improving the accuracy of pile integrity determination and the reliability of bearing capacity calculation.
Smart Images
Figure CN122109343B_ABST