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Estimation of 2D s-wave velocity section with low velocity layers by OCCAM algorithm
Pages: 87-90
Year: Issue:  4
Journal: Geotechnical Investigation & Surveying

Keyword:  pavement structure; OCCAM algorithm; lower velocity layers; Rayleigh waves; dispersion curves;
Abstract: The low velocity layers of pavement systems usually lead to serious subsidence and deformation of a roadbed.The OCCAM algorithm has been successfully used to invert transient Rayleigh wave dispersion curves for lower velocity layers.The new efficient algorithm can improve shear wave accuracy and resolution using thinned layers and weighted matrix,and can enhance iterative effect and adjust the relationship between resolution and solution by self-adaptive iterative smooth factor.Inversion results of field data indicate that the OCCAM algorithm is characterized by good stability,high accuracy and strong resolution,and can automatically invert shear wave velocity and thickness.
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