caa a22 4500 467930430 CHVBK 20180406152941.0 cr unu---uuuuu 170328e20060201xx s 000 0 eng 10.1007/s10706-004-2499-y doi (NATIONALLICENCE)springer-10.1007/s10706-004-2499-y Geotechnical Characteristics of Volcanic Soils Taken from Recent Eruptions [Elektronische Daten] [Rolando Orense, Andrew Zapanta Jr., Akinori Hata, Ikuo Towhata] Recent volcanic eruptions at Mt. Unzen (Japan) in 1990 and Mt. Pinatubo (Philippines) in 1991 produced voluminous amounts of ash and sediments which inundated widespread areas. In later rehabilitation and reconstruction, it is practical and economical to use these freshly deposited sediments as materials for foundations and embankments. However, the geotechnical properties of young volcanic products have not been fully investigated. Accordingly, we investigated the geotechnical characteristics of volcanic soils associated with three recent eruptions, namely, the Unzen and Izu-Oshima eruptions of 1990 and 1986, respectively, in Japan and the Pinatubo eruption of 1991 in the Philippines. We specifically investigated index properties, permeability and compaction characteristics, and strength and deformation behavior in drained conditions. Additionally, we examined the dynamic properties and liquefaction characteristics of samples taken from Mt. Pinatubo. The results showed that the geotechnical characteristics of the deposits generally varied with the sampling sites. Depending on the location, either upstream or downstream from a volcano, the preferential sizing due to alluvial deposition affects engineering properties of the deposits. For example, volcanic sediments upstream from Mt. Pinatubo have high compressibility and low cyclic strength, whereas those taken downstream show dilative tendencies and high liquefaction strength. Springer, 2006 deformation nationallicence geotechnical characteristics nationallicence strength nationallicence torsional shear nationallicence volcanic nationallicence Orense Rolando Chuo Kaihatsu Corporation, 3-13-5 Nishi-Waseda, 169-8612, Shinjuku, Tokyo, Japan aut Zapanta Jr. Andrew Department of Civil Engineering, University of Tokyo, Japan aut Hata Akinori Department of Civil Engineering, Chiba Institute of Technology, Japan aut Towhata Ikuo Department of Civil Engineering, University of Tokyo, Japan aut Geotechnical & Geological Engineering Kluwer Academic Publishers 24/1(2006-02-01), 129-161 0960-3182 24:1<129 2006 24 10706 https://doi.org/10.1007/s10706-004-2499-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10706-004-2499-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Orense Rolando Chuo Kaihatsu Corporation, 3-13-5 Nishi-Waseda, 169-8612, Shinjuku, Tokyo, Japan aut NATIONALLICENCE 700 1- Zapanta Jr Andrew Department of Civil Engineering, University of Tokyo, Japan aut NATIONALLICENCE 700 1- Hata Akinori Department of Civil Engineering, Chiba Institute of Technology, Japan aut NATIONALLICENCE 700 1- Towhata Ikuo Department of Civil Engineering, University of Tokyo, Japan aut NATIONALLICENCE 773 0- Geotechnical & Geological Engineering Kluwer Academic Publishers 24/1(2006-02-01), 129-161 0960-3182 24:1<129 2006 24 10706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer