Models test and quantitative identification of abnormal water-rich microcracks in lining structure
To investigate the identification of special-shaped water-rich micro-cracks in tunnel lining structures,ground-penetrating radar(GPR)was used to detect the water-filling models of four special-shaped micro-cracks.The F-K migration method was applied to offset and locate the radar characteristic signals of micro-cracks,with crack locations identified through waveform analysis and the wavelet modulus maximum algorithm.The results indicate that the radar response images of irregular micro-cracks are difficult to identify directly,while their morphology can be highlighted by the F-K migration method.Compared to waveform analysis,the wavelet modulus maximum algorithm provides more accurate positioning and identification of irregular micro-cracks.The two-dimensional contour reconstruction of the micro-fracture models fits the shape of the solid models.The research results provide a foundational basis for the identifying abnormal water-rich micro-cracks in tunnel lining structures.
ground-penetrating radarshield tunnelspecial-shaped water-rich micro-crackwavelet modulus maximum algorithmlocation recognition
NETL
NSTL
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