Centrifuge model test on earthquake-induced failure behaviour of slope in discontinuous rock mass

M. Ishimaru, T. Kawai

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

Abstract

We conducted a centrifuge model test on earthquake-induced rock slope failure. The test results were compared with Safety Factors (SFs) related to the sliding surface, obtained by the limit equilibrium method; the stresses on the sliding surface were estimated by equivalent linear analysis. A dip slope model for the centrifuge model test was constructed from cement, sand, iron powder, and water, and discontinuities were imitated by inserting Teflon sheets. In the test, the centrifugal acceleration was 30G, and the acceleration amplitudes of the input sine waves were increased gradually at every step. As a result, the slope model collapsed when it was excited by a sine wave of 3.5 m/s2, which was converted to a real field scale. The trends of the computed SFs showed that the threshold amplitude of the failure was lower than the actual amplitude that induced the failure, implying that the stability evaluation method based on the SFs was conservative.

Original languageEnglish
Title of host publicationHarmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics
Pages1919-1922
Number of pages4
Publication statusPublished - 2012
Externally publishedYes
Event12th International Congress on Rock Mechanics of the International Society for Rock Mechanics, ISRM 2011 - Beijing, China
Duration: 2011 Oct 182011 Oct 21

Publication series

NameHarmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics

Other

Other12th International Congress on Rock Mechanics of the International Society for Rock Mechanics, ISRM 2011
Country/TerritoryChina
CityBeijing
Period11/10/1811/10/21

Keywords

  • Dynamics
  • Physical modelling
  • Rock failure
  • Rock joints
  • Rock slopes and foundations
  • Stability analysis

ASJC Scopus subject areas

  • Geology
  • Geotechnical Engineering and Engineering Geology

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