Geotechnical characteristics of volcanic soil from seismically induced Aratozawa landslide, Japan

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Title Geotechnical characteristics of volcanic soil from seismically induced Aratozawa landslide, Japan
Author Gratchev, Ivan; Towhata, Ikuo
Journal Name Landslides
Year Published 2010
Place of publication Germany
Publisher Springer
Abstract 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. The Aratozawa landslide, which extended about 1,200 m long and 800 m wide, consisted of a complex system of ridges and depressions, including a number of smaller failures that occurred within the slide body. Field investigation was carried out to study the geotechnical properties of pumice that was exposed at the scarp of two smaller slides. The pumice was found to be heavily weathered, having low dry density and high moisture content. Portable cone penetration tests were performed to evaluate the in situ properties of soil as well as to determine the thickness of the weathered zone. Laboratory examination included slake-durability tests, grain-size distribution analysis, and a series of cyclic loading triaxial compression tests conducted on undisturbed and reconstituted samples. Laboratory test data indicated that the soil had a high potential for generation of excess pore-water pressures, suggesting that liquefaction might have occurred in the weathered mass of pumice during the earthquake.
Peer Reviewed Yes
Published Yes
Alternative URI
Volume 7
Issue Number 4
Page from 503
Page to 510
ISSN 1612-510X
Date Accessioned 2011-06-23
Date Available 2011-08-19T06:42:56Z
Language en_AU
Research Centre Centre for Infrastructure Engineering and Management
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Civil Geotechnical Engineering
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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