CPTu simplified stress-based model for evaluating soil liquefaction potential

C. Hsein Juang, Chien Hsun Chen, Paul W. Mayne

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

This paper presents a piezocone penetration test (CPTu) method for evaluating soil liquefaction potential covering a wider range of soil types than previous approaches and using simplified stress-based procedures. In the approach, the adjusted cyclic stress ratio is calculated with a recent formula created by Idriss and Boulanger, and the cyclic resistance ratio is determined as a function of both adjusted cone tip resistance (qtlN) and soil behavior type index (Ic). The new method is established through artificial neural network learning of documented cases. One unique feature of this method is the inclusion of excess porewater pressure ratio (Bq) in the formulation of Ic as per Jefferies and Davies. The proposed method is shown to be more applicable to a wider range of soils, including geomaterials that were previously considered "too clay-rich to liquefy." The ability of this method to delineate liquefied cases from non-liquefied cases is clearly depicted with 3-D and 2-D graphs. Case studies of selected ground failure sites in Adapazari using the proposed method yield results that agree well with field observations in the 1999 Kocaeli earthquake.

Original languageEnglish
Pages (from-to)755-770
Number of pages16
JournalSoils and Foundations
Volume48
Issue number6
DOIs
StatePublished - Dec 2008

Keywords

  • Artificial neural network
  • Case history
  • Cone penetration test
  • Cyclic resistance ratio
  • Cyclic stress ratio
  • Earthquake
  • Liquefaction potential
  • Model
  • Piezocone (IGC: C3/E8)

Fingerprint

Dive into the research topics of 'CPTu simplified stress-based model for evaluating soil liquefaction potential'. Together they form a unique fingerprint.

Cite this