Geotechnical characteristics of seismically-induced Aratozawa landslide, Japan
Author(s)
Gratchev, Ivan
Towhata, Ikuo
Griffith University Author(s)
Year published
2010
Metadata
Show full item recordAbstract
This paper seeks to investigate the properties of volcanic soil from the Aratozawa landslide, the largest failure triggered by the 2008 Iwate-Miyagi Nairiku earthquake, Japan. Field investigation was carried out to estimate the in-situ characteristics of volcanic material. It was found that the soil was highly weathered, having low dry density and high moisture content. Laboratory examination included a series of triaxial compression tests which were performed to evaluate the dynamic properties of volcanic soil. Results of undrained cyclic loading tests indicated that the material had a high potential for generation of ...
View more >This paper seeks to investigate the properties of volcanic soil from the Aratozawa landslide, the largest failure triggered by the 2008 Iwate-Miyagi Nairiku earthquake, Japan. Field investigation was carried out to estimate the in-situ characteristics of volcanic material. It was found that the soil was highly weathered, having low dry density and high moisture content. Laboratory examination included a series of triaxial compression tests which were performed to evaluate the dynamic properties of volcanic soil. Results of undrained cyclic loading tests indicated that the material had a high potential for generation of excess pore-water pressures, which could lead to a significant loss of strength during earthquake loading. This finding suggests that liquefaction might have occurred in the weathered mass of volcanic rocks during the earthquake, initiating the failure. Based on the results of this study, the role of volcanic soil in the slide development was determined.
View less >
View more >This paper seeks to investigate the properties of volcanic soil from the Aratozawa landslide, the largest failure triggered by the 2008 Iwate-Miyagi Nairiku earthquake, Japan. Field investigation was carried out to estimate the in-situ characteristics of volcanic material. It was found that the soil was highly weathered, having low dry density and high moisture content. Laboratory examination included a series of triaxial compression tests which were performed to evaluate the dynamic properties of volcanic soil. Results of undrained cyclic loading tests indicated that the material had a high potential for generation of excess pore-water pressures, which could lead to a significant loss of strength during earthquake loading. This finding suggests that liquefaction might have occurred in the weathered mass of volcanic rocks during the earthquake, initiating the failure. Based on the results of this study, the role of volcanic soil in the slide development was determined.
View less >
Conference Title
5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics and Symposium in Honor of Professor I.M. Idriss
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Copyright Statement
Self-archiving of the author-manuscript version is not yet supported by this conference Please refer to the conference link for access to the definitive, published version or contact the authors for more information.
Subject
Civil Geotechnical Engineering