Shaking table tests on geosynthetic encased columns in soft clay

C. Cengiz*, E. Guler

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

9 Citations (Scopus)

Abstract

This paper presents the results of an experimental research on the behavior of geosynthetic encased stone columns and ordinary stone columns embedded in soft clay under dynamic base shaking. For this purpose, a novel laminar box is designed and developed to run a total of eight sets of 1-G shaking table tests on four different model soil profiles: Soft clay bed, ordinary stone column installed clay bed, and clay beds with geosynthetic encased columns with two different reinforcement stiffnesses. The geosynthetic encased columns are heavily instrumented with strain rosettes to quantify the reinforcement strains developing under the action of dynamic loads. The responses of the columns are studied through the deformation modes of the encased columns and the magnitude and distribution of reinforcement strains under dynamic loading. The response of the granular inclusion enhanced soft subsoil and embankment soil and the identification of the dynamic soil properties of the entire soil body are also discussed in this article. Finally, to determine the effect of dynamic loading on the vertical load carrying capacity, stress-controlled column load tests are undertaken both on seismically loaded and undisturbed columns.

Original languageEnglish
Pages (from-to)748-758
Number of pages11
JournalGeotextiles and Geomembranes
Volume46
Issue number6
Early online date20 Jul 2018
DOIs
Publication statusPublished - Dec 2018

Keywords

  • Earthquake loading
  • Geosynthetic encased column
  • Geosynthetics
  • Laminar box
  • Ordinary stone column
  • Shake table test
  • Sinusoidal loading

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