Compaction-grouted micropiles at the Northwestern University NGES

Richard J. Finno, Catalina O. Perdomo, Michele Calvello

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations


Seven test and four reaction micropiles were installed in the surficial sands at the Northwestern University NGES. Two types of compaction-grouted micropiles were installed, multiple expanded tip and wedge compaction grouted piles. Variables considered in the testing program included were the stiffness of grout, drilling diameter, diameter of the reinforcing rod, pile length and volume of grout injected. Each test pile was axially loaded up to at least 440 kN. After the load tests were completed, all the micropiles were exhumed and their dimensions measured. As-built dimensions are compared with shapes inferred from the grouting records. The capacities of these seven micropiles were best estimated by the grouted anchor methodology proposed by Littlejohn (1993) and the pressuremeter approach proposed by Bustamante and Doix (1985).

Original languageEnglish (US)
Pages (from-to)235-249
Number of pages15
JournalGeotechnical Special Publication
Issue number93
StatePublished - 2000
EventA2K Specialty Conference on Performance Verification of Constructed Geotechnical Facilities - Amherst, MA, USA
Duration: Apr 9 2000Apr 12 2000

ASJC Scopus subject areas

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


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