Numerical analysis on loading transfer mechanism of geosynthetic-reinforced embankments over the Hong Kong marine deposits improved by deep cement mixed soil columns

Pei Chen Wu, Wei Qiang Feng, Jian Hua Yin

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The loading transfer mechanism of geosynthetic-reinforced embankments over soft ground improved by piles or columns has been studied for many years. However, for most cases, the consolidation of the soft soil ground, such as the Hong Kong Marine Deposits (HKMD), with noticeable time-dependent stress-strain behavior, has not been considered before. In this study, a finite element analysis is utilized to study the loading transfer of geosynthetic-reinforced embankment over HKMD improved by deep cement mixed soil (DCM) columns during both construction and post-construction stages. Based on the numerical analysis, it is found that, in the stage of embankment construction, the soil arching develops with increasing the filling height and the limit height of arching is 1.67 times the spacing of the DCM columns. In the stage of the post-construction, the soil arching undergoes a further development and the stress concentration ratio between the DCM columns and surrounding soil increases exponentially with the differential settlement.

Original languageEnglish
Title of host publication11th International Conference on Geosynthetics 2018, ICG 2018
PublisherKorean Geosynthetics Society
Pages550-557
Number of pages8
ISBN (Electronic)9781713806080
Publication statusPublished - 2018
Event11th International Conference on Geosynthetics 2018, ICG 2018 - Seoul, Korea, Republic of
Duration: 16 Sep 201821 Sep 2018

Publication series

Name11th International Conference on Geosynthetics 2018, ICG 2018
Volume1

Conference

Conference11th International Conference on Geosynthetics 2018, ICG 2018
Country/TerritoryKorea, Republic of
CitySeoul
Period16/09/1821/09/18

Keywords

  • Deep cement mixed soil columns
  • Embankment
  • Geosynthetic reinforcement
  • Soil arching

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Environmental Engineering
  • Global and Planetary Change
  • Polymers and Plastics
  • Atmospheric Science

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