Utilisation des ondes de surface pour l'inspection des parois de galeries

Abstract : Multi-Channel Acquisition of Surface Waves (MASW) has become very popular in recent years for non destructive testing of both layered natural and artificial (concrete) media. This method, based on the dispersive behaviour of surface waves, consists of two major steps. A phase velocity dispersion curve is first extract from the seismogram using a wave field transform (p- transform). Then the inversion of this latter produces a 1D interpretation of the medium in terms of transverse wave velocities versus depth. While these two major steps of the method are well-documented for plane stratified media, it's not the case when the investigated structure has a complex geometry. This dissertation deals with the evaluation of the feasibility to use MASW for non destructive evaluation of underground structures. After a brief survey of the problems that could be encountered with tunnel non destructive evaluation, this study focuses to determine and then proceed to the modifications needed to adapt the method for a concave geometry structure use
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Julien Lagarde. Utilisation des ondes de surface pour l'inspection des parois de galeries. Autre. Institut National Polytechnique de Lorraine, 2007. Français. ⟨NNT : 2007INPL067N⟩. ⟨tel-01752826⟩

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