A case study of liquefaction risk analysis based on the thickness and depth of the liquefaction layer using CPT and electric resistivity data in the Hinode area, Itako City, Ibaraki Prefecture, Japan
Motoharu Jinguuji 1 3 Selcuk Toprak 21 National Institute of Advanced Industrial Science and Technology, 1-1-1-C7 Higashi, Ibaraki 305-8567, Japan.
2 Department of Civil Engineering, Pamukkale University, Kinikli Campus Denizli, 20070, Turkey.
3 Corresponding author. Email: m.jinguuji@aist.go.jp
Exploration Geophysics 48(1) 28-36 https://doi.org/10.1071/EG16137
Submitted: 10 November 2016 Accepted: 14 November 2016 Published: 22 December 2016
Abstract
The Hinode area of Itako City in Ibaraki Prefecture, Japan, suffered some of the most severe liquefaction damage of any areas in the Great Eastern Japan Earthquake in 2011. This liquefaction damage has been investigated by Itako City, as well as by universities and research institutes in Japan. The National Institute of Advanced Industrial Science and Technology (AIST) has carried out numerous investigations along the Tone River, and in particular, intensive surveys were done in the Hinode area. We have conducted a risk analysis based on the thickness and depth of the liquefaction layer measured using cone penetration testing (CPT) data and electric resistivity data obtained in the Hinode area. The distribution of the risk estimated from CPT at 143 points, and that obtained from analysis of the resistivity survey data, agreed with the distribution of actual damage. We also carried out conventional risk analyses method using the liquefaction resistance factor (FL) and liquefaction potential index (PL) methods with CPT data. The results show high PL values over the entire area, but their distribution did not agree well with actual damage in some parts of the study area. Because the analysis of the thickness and depth of the liquefaction layer, using geophysical prospecting methods, can cover a widespread area, this method will be very useful in investigating liquefaction risk, especially for gas and water pipelines.
Key words: 2011 Great Eastern Japan Earthquake, CPT, electric resistivity survey, liquefaction.
References
Architectural Institute of Japan, 1988, Recommendations for Design of Building Foundations, 67–71.Architectural Institute of Japan, 2008, Recommendations for Design of Small Building Foundations, 88–92.
Hitomi, T., 2002, Risk Evaluation of Soil Liquefaction for Earthquake Resistant Design of Residential Land, research report of Urban Renaissance Agency, No. 133. [Web document]. Available at http://www.ur-net.go.jp/lab/kiho133/133-09.pdf (accessed 12 May 2016).
Holzer, T. L., Toprak, S., and Bennett, M. J., 2002, Liquefaction potential index and seismic hazard mapping in the San Francisco Bay area, California: Seventh U.S. National Conference on Earthquake Engineering, Theme: Urban Earthquake Hazard, Boston, II
Itako City, 2014, A report on the project of liquefaction measures at Hinode area, Chapter 1, Outline. [Web document]. Available at <http://www.city.itako.lg.jp/cms/data/doc/1385542213_doc_1_0.pdf> (accessed 29 September 2015).
Iwasaki, T., Tatsuoka, F., Tokida, K., and Yasuda, S., 1978, A practical method for assessing soil liquefaction potential based on case studies at various sites in Japan: Proceedings of the 2nd International Conference on Microzonation, San Francisco, 885–896.
Iwasaki, T., Tokida, K., Tatsuoka, F., Watanabe, S., Yasuda, S., and Sato, H., 1982, Microzonation for soil liquefaction potential using simplified methods: Proceedings of the 3rd International Earthquake Microzonation Conference, Seattle, 1319–1330.
Komatsubara, J., Mizuno, K., Ishihara, Y., Ishihara, T., Yasuhara, M., Inamura, A., and Kazaoka, O., 2014, Relationship between liquefaction and geology in the downstream basin of the Tone River: Reports of research and investigation on multiple geological hazards caused by huge earthquakes, GSJ Interim Report, 245–272.
Mitsuhata, Y., Mizuno, K., Jinguuji, M. Matsuoka, M., 2014, Summary of investigation and evaluation study on liquefaction risk in the 2011 Great East Japan Earthquake disaster: Reports of research and investigation on multiple geological hazards caused by huge earthquakes, GSJ Interim Report, 173–177.
Robertson, P. K., and Wride, C. E., 1997, Cyclic liquefaction and its evaluation based on the SPT and CPT, in T. L. Youd, and I. M. Idriss, eds., Proceedings of National Center for Earthquake Engineering Research Workshop on Evaluation of Liquefaction Resistance of Soils, Technical Report No. NCEER-97–0022: NCEER, 41–87.
Seed, H. B., and Idriss, I. M., 1971, Simplified procedure for evaluating soil liquefaction potential: Journal of the Geotechnical Engineering Division, 97, 1249–1273
The Geological Society of Japan, 2013, [Web document in Japanese]. Available at http://www.geosociety.jp/hazard/content0079.html (accessed 29 September 2015).
Toprak, S., and Holzer, T. L., 2003, Liquefaction potential index: a field assessment: Journal of Geotechnical and Geoenvironmental Engineering, 129, 315–322
| Liquefaction potential index: a field assessment:Crossref | GoogleScholarGoogle Scholar |
Youd, T. L., Idriss, I. M., Andrus, R. D., Arango, I., Castro, G., Christian, J. T., Dobry, R., Liam Finn, W. D., Harder Jr, L. H., Hynes, M. E., Ishihara, K., Koester, J. P., Liao, S. S. C., Marcuson, W. F., Marting, G. R., Mitchell, J. K., Moriwaki, Y., Power, M. S., Robertson, P. K., Seed, R. B., and Stokoe, K. H., 2001, Liquefaction resistance of soils: summary from the 1996 NCEER and 1998 NCEER/NSF workshops on evaluation of liquefaction resistance of soil: Journal of Geotechnical and Geoenvironmental Engineering, 127, 817–833
| Liquefaction resistance of soils: summary from the 1996 NCEER and 1998 NCEER/NSF workshops on evaluation of liquefaction resistance of soil:Crossref | GoogleScholarGoogle Scholar |
