Effect of geocell-reinforced sand base on bearing capacity of twin circular footings

P. Fazeli Dehkordi, M. Ghazavi*, N. Ganjian, U. F.A. Karim

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Scopus)

Abstract

The presence of a rigid layer underlying a soil bed layer supporting twin footings affects the footing bearing capacity and settlement. In this study, the bearing capacity and settlement of twin large-scale circular footings on unreinforced and geocell-reinforced sand layers with various thicknesses are investigated. The role of layer thickness, distance between two adjacent footings, and footing diameter indicates that the rigid base substantially influences the footing bearing pressure, settlement and tilt. The results show that the maximum bearing capacity is achieved when two footings are in contact and the rigid base is at shallow depth. The influence of the footing interference on settlement and tilting of closely spaced footings at a given load decreases with decreasing depth of rigid base and reinforcing the sand with geocells. This is observed for rigid bases located at less than about 2B, where B is the footing diameter.

Original languageEnglish
Pages (from-to)224-236
Number of pages13
JournalGeosynthetics International
Volume26
Issue number3
Early online date19 Jun 2019
DOIs
Publication statusPublished - Jun 2019

Keywords

  • Bearing capacity
  • Circular footing
  • Footing settlement
  • Geocell reinforcement
  • Geosynthetics
  • Interference effect
  • Rigid base

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