Challenges and solutions to model-scale testing for composite deep foundations for existing foundation enhancement

Debra F. Laefer, Jonathan P. Manke, Jason E. Tucker, Yuri Batten

Research output: Contribution to journalConference articlepeer-review


Laboratory testing for foundation design offers advantages over field-testing, especially, where existing installations preclude easy accessibility. Advantages include a homogeneous soil, ability to place instrumentation throughout the soil mass, and capacity to bring the system to failure, as well as control over the failure mechanism. Repeatability is also achievable. Laboratory work, however, has its own challenges. For model-scale work, a main impediment is scaling: strength, dimensions, and boundary conditions hinder accurate modeling of the soil and brings a difficulty in representing scaled foundations. This paper describes the construction-oriented solutions pioneered for meeting the geometric requirements of th scaled laboratory testing of composite deep foundations for existing foundation enhancement, including drilled shafts, helical piers, and grouting. Results of the testing program are included as verification of the usefulness of the techniques. Copyright ASCE 2007.

Original languageEnglish (US)
JournalGeotechnical Special Publication
Issue number158
StatePublished - 2007
EventGeo-Denver 2007: New Peaks in Geotechnics - Denver, CO, United States
Duration: Feb 18 2007Feb 21 2007


  • Drilled shafts
  • Foundations
  • Ground improvement
  • Ground reinforcement
  • Grouting
  • Helical piers
  • Laboratory testing
  • Piles
  • Reuse

ASJC Scopus subject areas

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


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