A methodology for evaluating liquefaction susceptibility in shallow sandy slopes

Giuseppe Buscarnera, A. J. Whittle

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

Abstract

The paper illustrates a modeling approach for evaluating the liquefaction susceptibility of shallow sandy slopes. The proposed methodology consists of two main components: (i) a theoretical framework for undrained stability and (ii) the MIT-S1 constitutive model for simulating the response of sands. In the first part of the paper, the use of a stability index able to capture the onset of undrained failure in infinite slopes is illustrated. In the second part, the practical significance of the method is discussed by back-analyzing the series of flow failures in an underwater berm at the Nerlerk site. The reinterpretation of these events in the light of the theory of material stability confirmed that liquefaction was a plausible mechanism for the failures. In addition, the analyses have provided a prediction of the spatial distribution of the unstable masses which is compatible with what was observed through bathimetric surveys conducted after the events. This particular application of the theory supports the idea that realistic constitutive modeling is crucial for achieving consistent predictions of liquefaction potential under field conditions.

Original languageEnglish (US)
Title of host publication18th International Conference on Soil Mechanics and Geotechnical Engineering
Subtitle of host publicationChallenges and Innovations in Geotechnics, ICSMGE 2013
PublisherIOS Press
Pages2153-2156
Number of pages4
Volume3
StatePublished - Jan 1 2013
Event18th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2013 - Paris, France
Duration: Sep 2 2013Sep 6 2013

Other

Other18th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2013
CountryFrance
CityParis
Period9/2/139/6/13

Keywords

  • Constitutive modeling
  • Flow slides
  • Material stability
  • Sands
  • Static liquefaction
  • Theoretical analyses

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Buscarnera, G., & Whittle, A. J. (2013). A methodology for evaluating liquefaction susceptibility in shallow sandy slopes. In 18th International Conference on Soil Mechanics and Geotechnical Engineering: Challenges and Innovations in Geotechnics, ICSMGE 2013 (Vol. 3, pp. 2153-2156). IOS Press.