Numerical Parametric Study of Strip Footing on Reinforced Embankment Soils

Finite element analyses were conducted to assess the benefits of reinforcing embankment soil of low to medium plasticity with geogrids beneath a strip footing from the perspective of the ultimate bearing capacity and footing settlement. The embankment soil was modeled with the Drucker–Prager constitutive model, and the soil–geogrid interaction was modeled by the Coulomb friction model. The finite element model was verified first by laboratory model tests; it was then used to analyze the strip footing sitting on the reinforced soil to seek an optimum reinforcement design. To this end, several geogrid-reinforcement design parameters—including effective reinforcing depth, vertical spacing between reinforcement layers, geogrid stiffness, soil–geogrid interaction coefficient, depth (top spacing) of first geogrid layer, footing embedment, and footing width—were investigated. The results of this study showed that the effective reinforcement depth was approximately 1.5 times the footing width, and an optimum depth of first reinforcement layer existed where the highest bearing capacity could be achieved. The influence of other design parameters on footing’s bearing capacity and settlement was also analyzed.

• Record URL:
  https://doi.org/10.3141/2004-14
• 
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Numerical+Parametric+Study+of+Strip+Footing+on+Reinforced+Embankment+Soils&author=M.+Abu-Farsakh&author=J.+Gu&author=G.+Voyiadjis&author=M.+Tao&publication_year=2007
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/159491.aspx
• Authors:
  • Abu-Farsakh, Murad Yusuf
  • Gu, Jie
  • Voyiadjis, George Z
  • Tao, Mingjiang
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 132-140
• Monograph Title: Soil Mechanics 2007
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2004
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Bearing capacity; Embankments; Finite element method; Geogrids; Laboratory tests; Material reinforcement; Mathematical models; Settlement (Structures); Stiffness; Strip footings
• Uncontrolled Terms: Soil geogrid interaction
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01046313
• Record Type: Publication
• ISBN: 9780309104302
• Files: TRIS, TRB
• Created Date: Apr 24 2007 7:19AM