Abstract
Experiments have been conducted to determine the effects of parallel and variable directional joints on ultrasonic pulse propagation in two 60 × 60 × 360 mm prismatic marble blocks containing no joints, six parallel joints, and six variable directional joints. The results indicated that the attenuation increases with increasing ratio of joints in both models, but the attenuation ratio was higher for the variable directional jointed model than for the model with parallel joints. The relationships between the number of joints and ultrasonic pulse velocities were statistically investigated and the results were evaluated with those found in literature.
Résumé
Des mesures de vitesses de propagation d’ondes ultrasoniques ont été réalisées sur des échantillons prismatiques de marbre, de dimension 60 × 60 × 360 mm, pour caractériser l’influence de joints de différentes orientations. Ces échantillons ne contenaient aucun joint, ou contenaient six joints parallèles ou bien six joints d’orientations différentes. Les résultats ont montré que l’atténuation des ondes augmentait avec la présence des joints et qu’elle était plus importante dans le cas de joints de différentes orientations que dans le cas de joints parallèles. Les relations entre le nombre de joints et les vitesses de propagation des ondes ultrasoniques ont été traitées de façon statistique et comparées à celles présentées dans la littérature technique.
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Kurtuluş, C., Üçkardeş, M., Sarı, U. et al. Experimental studies in wave propagation across a jointed rock mass. Bull Eng Geol Environ 71, 231–234 (2012). https://doi.org/10.1007/s10064-011-0392-5
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DOI: https://doi.org/10.1007/s10064-011-0392-5