Abstract
Old landslides in precarious conditions and new masses are moved or removed by particularly heavy rainfalls. Phenomena relative to rock slides and earth slides are examined to evaluate the relations between mass movements, rainfall and interstitial pressures.
After a description of some mass movements taken from the literature, an analysis of some geological examples of landslides occurred in Tuscany Region (where instrument systems are) is carried out in order to research the value of the critic pluviometric threshold for which there is a geological hazard of sliding.
Résumé
D'anciens glissements de terrains instables ou des glissements nouveaux sont mis ou remis en mouvement par des chutes de pluie particulièrement fortes. Des phénomènes concernant des glissements de sols et de roches sont étudiés par les auteurs pour évaluer les relations entre les mouvements de terrain, les chutes de pluie et les pressions interstitielles.
Après avoir rappelé quelques glissements déjà étudiés dans la littérature, les auteurs analysent quelques exemples de glissements qui se sont produits en Toscane et, dans lesquels, des appareils de mesure ont été mis en place, le but visé étant de trouver la valeur du seuil critique au-delà duquel un glissement risque de se produire.
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Canuti, P., Focardi, P. & Garzonio, C.A. Correlation between rainfall and landslides. Bulletin of the International Association of Engineering Geology 32, 49–54 (1985). https://doi.org/10.1007/BF02594765
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DOI: https://doi.org/10.1007/BF02594765