Reliability-based design for earth-fill dams against severe natural disaster events

Research output: Contribution to journalArticlepeer-review

Abstract

The maintenance of geotechnical structures, such as earth-fill dams, is required as a countermeasure against severe natural disasters, particularly earthquakes and heavy rains. The reliability-based analysis introduced here is in response to the recent demand for low-cost improvements. First, a statistical model of N values was determined from Swedish weight sounding (SWS) tests to present the spatial variability of the soil strength. Then, a reliability-based analysis of embankments was conducted by considering the variability of the internal friction angle derived from N value, and the seismic hazard for the Nankai Trough. The next step was to evaluate the probability of the overflow of earth-fills during heavy rains. The rainfall intensity was considered as a probabilistic parameter, and the various rainfall patterns were tested by the proposed method. Finally, the total risk due to both earthquakes and heavy rains was evaluated for an earth-fill site. As a result, the possibility for the practical use of the proposed method in making plans for the maintenance of deteriorated earth-fill dams was verified.

Original languageEnglish
Pages (from-to)271-282
Number of pages12
JournalSoils and Foundations
Volume61
Issue number2
DOIs
Publication statusPublished - Apr 2021

Keywords

  • Dam breaching
  • Damage probability
  • Earth-fill dam
  • Fragility curve
  • Hazard curve
  • Natural disaster
  • Risk evaluation
  • Sounding test
  • Spatial variability

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology

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