Numerical study of creep effects on settlements and load transfer mechanisms of soft soil improved by deep cement mixed soil columns under embankment load

Pei Chen Wu, Wei Qiang Feng, Jian Hua Yin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Deep cement mixed (DCM) soil columns have been widely utilized to improve soft soil to support embankments or seawalls. However, the influence of the time-dependent behavior of the soft soil on the performance of DCM column-supported embankments is not well understood. In this study, the finite element (FE) model was established to investigate the creep effects on settlements and load transfer mechanisms of the soft soil improved by DCM columns under embankment load. Comparisons were conducted for the cases of the soft soil with or without creep. The parametric analysis demonstrated that the area replacement ratio and Young's modulus of the DCM column can largely influence the long-term behaviors of the DCM column-improved composite ground. The numerical results were also compared with the results calculated by German design method (EBGEO) and British design method (BS 8006). Regarding the vertical stress taken by the DCM column, EBGEO method provides a lower limit while BS 8006 method provides an upper limit.

Original languageEnglish
Pages (from-to)331-348
Number of pages18
JournalGeotextiles and Geomembranes
Volume48
Issue number3
DOIs
Publication statusPublished - Jun 2020

Keywords

  • Column-supported embankment
  • Creep
  • Deep cement mixed soil column
  • Geosynthetics
  • Load transfer
  • Settlements

ASJC Scopus subject areas

  • Materials Science(all)
  • Geotechnical Engineering and Engineering Geology

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