Liquefaction Potential of Christchurch Silty Soil

Zorana Mijic, Jonathan D. Bray, Michael F. Riemer, Misko Cubrinovski, Sean D. Rees

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


Southwest Christchurch, New Zealand, with thick successions of thinly interbedded fine sand and silt swamp deposits, had no-to-marginal liquefaction ejecta in the 2010-2011 Canterbury earthquakes even though state-of-practice liquefaction assessment procedures indicated severe ground failure would occur. To understand reasons for this discrepancy, the first cyclic simple shear tests were performed on high-quality “undisturbed” specimens of Christchurch silty soil. An alternative Japanese Standard JIS A 1224:2009 Test Method was developed to evaluate the minimum and maximum void ratios of the cyclic test specimens and establish their relative densities. The cyclic test specimens of the same soil unit were then mixed and reconstituted for steady-state testing in a triaxial device. This paper presents the stress-strain relationships, cyclic resistance ratio curves, and steady-state lines for three silty soils. The silty soils exhibited cyclic mobility with limited strain potential in the cyclic simple shear tests. The same dilative tendencies of the soil at its current state and effective stress were confirmed by the steady-state test results.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
EditorsT. Matthew Evans, Nina Stark, Susan Chang
PublisherAmerican Society of Civil Engineers (ASCE)
Number of pages11
EditionGSP 349
ISBN (Electronic)9780784485309, 9780784485316, 9780784485323, 9780784485330, 9780784485347, 9780784485354
StatePublished - 2024
EventGeo-Congress 2024: Geotechnics of Natural Hazards - Vancouver, Canada
Duration: Feb 25 2024Feb 28 2024

Publication series

NameGeotechnical Special Publication
NumberGSP 349
ISSN (Print)0895-0563


ConferenceGeo-Congress 2024: Geotechnics of Natural Hazards

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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