Mitigation of liquefaction hazard by dynamic compaction — A random field perspective

Mengfen Shen, C. Hsein Juang, Qiushi Chen

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

This paper presents the findings of a case study to quantitatively assess the effect of dynamic compaction (DC) on mitigating liquefaction hazards from a random field perspective. DC is known to increase the density and strength of loose sand deposits, leading to a decrease in liquefaction potentials. Thus, by comparing the liquefaction potentials before and after DC at a given site, the effectiveness of DC in mitigating liquefaction hazards can be quantified. In practice, however, a direct one-to-one comparison is challenging due to limited availability of in situ test data and the fact that the number and location of these data before and after DC are typically different. To overcome these challenges, a random field-based approach is proposed in this study to visualize and quantitatively evaluate the effectiveness of DC across the entire project site. This approach is proven effective in assessing the effects of DC and is validated with liquefaction observations from the 1999 Chi-Chi earthquake.

Original languageEnglish
Pages (from-to)1803-1815
Number of pages13
JournalCanadian Geotechnical Journal
Volume56
Issue number12
DOIs
StatePublished - 2019

Keywords

  • Cone penetration test (CPT)
  • Dynamic compaction
  • Liquefaction
  • Random field models

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