Numerical Investigation on the Performance of Geosynthetic-Reinforced Soil Piers under Axial Loading

Mahsa Khosrojerdi, Tong Qiu, Ming Xiao, Jennifer Nicks

Research output: Contribution to journalConference article

Abstract

In this study, a numerical investigation was conducted to study the settlement of GRS piers under applied axial loads. A finite-difference program was used to model full-scale GRS piers. The backfill soil is simulated using the plastic hardening model combined with strain-softening behavior. The developed model is validated against the results of full-scale GRS pier performance tests. The numerical results were compared with the observed pier settlement data, and it was found that the model adequately captures the behavior of GRS piers under axial loading. After validation, the influences of reinforcement strength, reinforcement vertical spacing, pier height, and pier cross-sectional dimensions were investigated through a parametric study. Results indicated that increasing the reinforcement strength and decreasing its spacing have a significant benefit in reducing the settlement of GRS piers.

Original languageEnglish (US)
Pages (from-to)99-108
Number of pages10
JournalGeotechnical Special Publication
Volume2018-March
Issue numberGSP 297
DOIs
StatePublished - Jan 1 2018
Event3rd International Foundation Congress and Equipment Expo 2018: Developments in Earth Retention, Support Systems, and Tunneling, IFCEE 2018 - Orlando, United States
Duration: Mar 5 2018Mar 10 2018

Fingerprint

Piers
pier
geosynthetics
Soils
soil
reinforcement
Reinforcement
spacing
Axial loads
backfill
softening
hardening
Hardening
plastic
Plastics

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

Cite this

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abstract = "In this study, a numerical investigation was conducted to study the settlement of GRS piers under applied axial loads. A finite-difference program was used to model full-scale GRS piers. The backfill soil is simulated using the plastic hardening model combined with strain-softening behavior. The developed model is validated against the results of full-scale GRS pier performance tests. The numerical results were compared with the observed pier settlement data, and it was found that the model adequately captures the behavior of GRS piers under axial loading. After validation, the influences of reinforcement strength, reinforcement vertical spacing, pier height, and pier cross-sectional dimensions were investigated through a parametric study. Results indicated that increasing the reinforcement strength and decreasing its spacing have a significant benefit in reducing the settlement of GRS piers.",
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Numerical Investigation on the Performance of Geosynthetic-Reinforced Soil Piers under Axial Loading. / Khosrojerdi, Mahsa; Qiu, Tong; Xiao, Ming; Nicks, Jennifer.

In: Geotechnical Special Publication, Vol. 2018-March, No. GSP 297, 01.01.2018, p. 99-108.

Research output: Contribution to journalConference article

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AU - Khosrojerdi, Mahsa

AU - Qiu, Tong

AU - Xiao, Ming

AU - Nicks, Jennifer

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Y1 - 2018/1/1

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