An Audio-frequency Stress Wave Reflection Method for Engineering Evaluation of Pile Testing
In this paper, an audio-frequency stress wave reflection method for engineering evaluation of pile testing is presented. First, the standard samples to train the system and extract module parameters suitable for the measuring environment are selected to detect the defects location and the length of the tested pile; then, the parameters are inputted into the hybrid model based on the FFT analysis, wavelet de-noising and Hilbert transform to extract the instantaneous phase change-point caused by reflected wave. The proposed method is applied to the bolt anchoring quality inspection on the Gongboxia Hydropower Station in Qinghai province. The experimental results show that the average error of the proposed method for detecting length and defect location are 2.5％ and 2.1％ respectively, much lower than the traditional method of 6.6％ and 6.9％.
pile testing FFT analysis wavelet de-noising hilbert transform
Mingzhang Luo Junming Wang Jianghan Zhao Guocheng li
Yangtze University Jingzhou, China
国际会议
太原
英文
655-658
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）