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Fig. 7

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Observations réalisées durant les essais. En haut à gauche : fontis en crête durant l’essai 1.8 ; en haut à droite : érosion régressive du pied de noyau durant l’essai 1.5 ; en bas à gauche : conduit traversant lors de l’essai 1.4 ; en bas à droite : conduit traversant au démontage de l’essai 1.6.

Observations made during the tests. Top left: crest sinkhole during test 1.8; top right: regressive erosion of the core foot during test 1.5; bottom left: pipe during test 1.4; bottom right: pipe during dismantling test 1.6.

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