Evaluation of liquefaction probability of earth-fill dam over next 50 years using geostatistical method based on CPT

Kazunari Imaide, Shin ichi Nishimura, Toshifumi Shibata, Takayuki Shuku, Akira Murakami, Kazunori Fujisawa

Research output: Contribution to journalArticle

Abstract

A method for evaluating the liquefaction probability of an earth-fill dam over the next 50 years is presented through the use of a geostatistical method for the measured values from cone penetration tests (CPTs). In particular, this paper discusses a new procedure for evaluating the liquefaction probability based on CPTs. Although the fines content, Fc, and the N-value are required in the Japanese standards to evaluate the liquefaction risk, the number of test data is not enough for the statistical modeling. Herein, Fc and the N-value are derived directly from CPTs. The statistical modeling procedure for Fc and the N-value is the unique point of this study. Since CPTs can be conducted with short intervals, especially in the horizontal direction, the geostatistical parameters can be determined, and the geostatistical simulation method is applicable for evaluating the liquefaction probability. In addition, since the frequency of the seismic load at the studied site will affect the liquefaction probability, the seismic hazard should be evaluated properly. An illustrative example, assessing the liquefaction probability of an earth-fill dam in Japan, is presented to demonstrate the capability of the proposed method. Finally, the spatial average of the liquefaction probability of the dam over the next 50 years is calculated. The proposed procedure is confirmed to work well for actual design problems.

Original languageEnglish
JournalSoils and Foundations
DOIs
Publication statusAccepted/In press - Jan 1 2020

Fingerprint

cone penetration test
Liquefaction
liquefaction
Dams
Cones
fill
dam
Earth (planet)
evaluation
method
seismic hazard
modeling
Hazards
simulation

Keywords

  • Cone penetration test
  • Geostatistics
  • Liquefaction
  • Seismic hazard
  • Spatial variability

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology

Cite this

Evaluation of liquefaction probability of earth-fill dam over next 50 years using geostatistical method based on CPT. / Imaide, Kazunari; Nishimura, Shin ichi; Shibata, Toshifumi; Shuku, Takayuki; Murakami, Akira; Fujisawa, Kazunori.

In: Soils and Foundations, 01.01.2020.

Research output: Contribution to journalArticle

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