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Geomechanical characterization of the volcaniclastic material involved in the 2002 landslides at stromboli / Tatiana Rotonda in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 2 (Fevrier 2010) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 2 (Fevrier 2010) . - pp. 389-401 Titre : Geomechanical characterization of the volcaniclastic material involved in the 2002 landslides at stromboli Type de document : texte imprimé Auteurs : Tatiana Rotonda, Auteur ; Paolo Tommasi, Auteur ; Daniela Boldini, Auteur Article en page(s) : pp. 389-401 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Volcanic  rocks  Shear  strength  Laboratory  test  Landslides  Volcaniclastic  soil Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : During the 2002 eruption, the NW flank of Stromboli volcano (Southern Italy) experienced large landslides that produced tsunami waves with a maximum runup of 10 m in height. This paper focuses on the geomechanical behavior of the loose volcaniclastic layers, the weakest component of the deposit forming the volcano flank. Tests on the coarse-grained volcaniclastic soil and on the rock material forming the grains were conducted in dry conditions, a feature of the subaerial slope. The rock material, in spite of its high porosity, exhibits relatively high stiffness and strength due to the remarkable continuity of the solid skeleton. Accordingly, the volcaniclastic soil is characterized by high shear strength. During shear tests, however, significant grain crushing occurs, which partly explains the nonlinear shear strength envelope and the strain softening associated with contractive behavior. Grain crushing was also found to affect compressibility and its time dependency, investigated under oedometric conditions. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&smode=strres [...] [article] Geomechanical characterization of the volcaniclastic material involved in the 2002 landslides at stromboli [texte imprimé] / Tatiana Rotonda, Auteur ; Paolo Tommasi, Auteur ; Daniela Boldini, Auteur . - pp. 389-401. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 2 (Fevrier 2010) . - pp. 389-401 Mots-clés : Volcanic  rocks  Shear  strength  Laboratory  test  Landslides  Volcaniclastic  soil Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : During the 2002 eruption, the NW flank of Stromboli volcano (Southern Italy) experienced large landslides that produced tsunami waves with a maximum runup of 10 m in height. This paper focuses on the geomechanical behavior of the loose volcaniclastic layers, the weakest component of the deposit forming the volcano flank. Tests on the coarse-grained volcaniclastic soil and on the rock material forming the grains were conducted in dry conditions, a feature of the subaerial slope. The rock material, in spite of its high porosity, exhibits relatively high stiffness and strength due to the remarkable continuity of the solid skeleton. Accordingly, the volcaniclastic soil is characterized by high shear strength. During shear tests, however, significant grain crushing occurs, which partly explains the nonlinear shear strength envelope and the strain softening associated with contractive behavior. Grain crushing was also found to affect compressibility and its time dependency, investigated under oedometric conditions. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&smode=strres [...]