Fundamental study on liquefaction strength of volcanic ash soil during the 2016 kumamoto earthquake

K. Ogo, H. Hazarika, M. M.P. Phyo, T. Kokusho, S. Ishibashi, S. Yamamoto, D. Matsumoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In April, 2016, two consecutive earthquakes registering 7 on Japanese scale occurred within 28 hours during the 2016 Kumamoto Earthquake, and caused liquefaction in many places around Kumamoto Plain. However, considering the magnitude and the distance from the hypocenter, the liquefaction-induced damage was not serious. Most of sand boiling was observed in places with higher likelihood of liquefaction such as near waterfront and on old river channels. In addition, black sand which seems to be of volcanic origin was observed as ejecta of liquefaction in many places. Therefore, cyclic triaxial tests were conducted to understand the relatively low liquefaction susceptibility on volcanic ash soil from Kumamoto by borehole sampling. Intact specimens were tested to evaluate the ageing effect in comparison with corresponding reconstituted specimens. Dissipated energy during cyclic loading was focused here as well as CRR to highlight the difference of liquefaction strength between the two kinds of specimens.

Original languageEnglish
Title of host publicationEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019
EditorsFrancesco Silvestri, Nicola Moraci
PublisherCRC Press/Balkema
Pages4187-4194
Number of pages8
ISBN (Print)9780367143282
Publication statusPublished - Jan 1 2019
Event7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019 - Rome, Italy
Duration: Jan 17 2019Jan 20 2019

Publication series

NameEarthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019

Conference

Conference7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019
CountryItaly
CityRome
Period1/17/191/20/19

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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  • Cite this

    Ogo, K., Hazarika, H., Phyo, M. M. P., Kokusho, T., Ishibashi, S., Yamamoto, S., & Matsumoto, D. (2019). Fundamental study on liquefaction strength of volcanic ash soil during the 2016 kumamoto earthquake. In F. Silvestri, & N. Moraci (Eds.), Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019 (pp. 4187-4194). (Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019). CRC Press/Balkema.