Abstract
Numerical modelling has been used for analyzing stresses and displacements for the very steep and more than 1,000 m high Heggura rock slope near Tafjord, Norway where a disastrous 3 million m3 rock slide occurred in 1934. It is shown that very anisotropic stresses exist near the slope surface and displacements of the remaining slope as result of the 1934 slide have been calculated to up to 210 mm. Such considerable displacements are believed to have a significant impact on the present and future stability of the Heggura slope.
Résumé
Une modélisation numérique a été réalisée pour analyser les contraintes et les déplacements relatifs au versant rocheuxde Heggura, de plus de 1000 m de hauteur, près de Tafjord en Norvège. Il s’agit d’un endroit où un glissement rocheux désastreux de 3 millions de m3 a eu lieu en 1934. Le calcul montre qu’un champ de contraintes très anisotrope existe sous la surface du versant et que les déplacements du versant qui ont suivi le glissement rocheux s’élèvent à 210 mm. On pense que de tels déplacements ont des conséquences sur la stabilité actuelle et future du ver ant de Heggura.
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Acknowledgements
Dr. Lars Harald Blikra of the Geological Survey of Norway (NGU) is acknowledged for useful comments and for having provided topographical profiles for this study.
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Panthi, K.K., Nilsen, B. Numerical analysis of stresses and displacements for the Tafjord slide, Norway. Bull Eng Geol Environ 65, 57–63 (2006). https://doi.org/10.1007/s10064-005-0009-y
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DOI: https://doi.org/10.1007/s10064-005-0009-y