Wavelet analysis on prestressed duct grouting condition detection with ultrasonic method

In order to solve quality problems about prestressed duct grouting of bridge construction, ultrasonic inspection technique is adopted in quality detection of prestressed duct grouting, and wavelet analysis method is applied to analyze the measured wave shape. According to matlab wavelet analysis theory, the self-programming is put to use in wave shape analysis by decomposing, reconstructing and de-noising. By analyzing the differences between parameters of full-grouting waveform datum and unfull-grouting ones through wavelet transformation, the performance of pre-stressed duct unfull-grouting is figured out in the wavelet analysis, which provides a new method for quality detection of prestressed duct grouting.