Testing of Augered Cast-in-Place Piles Installed with Varying Auger Rotations

Augered cast-in-place piles are installed by the excavation of the soil by rotation of a continuously flighted auger into the ground and then placement of a fluid cement grout into the evacuated volume as the auger is extracted. The soil conditions immediately after excavation for augered cast-in-place piles will be related to the in situ soil conditions, the auger specifications, and the rates of penetration and auger rotation. Intuitively, the potential for soil removal will increase proportional to the number of auger rotations; however, the soil transport mechanism involved is complex. To evaluate the effect of augering on the axial behavior of full-scale augered cast-in-place piles, four piles were installed with varying auger rotations and then load tested in axial compression. The soil conditions were primarily sand above the water table. The results of cone penetration testing indicate that the number of auger rotations did not significantly influence the cone resistance in the sand above the water table. Limited data suggest that some loosening occurs in the sand below the water table. The results of the loading tests indicate that the geotechnical resistance - and notably the shaft resistance - is not sensitive to the number of auger rotations for the study conditions.

• Record URL:
  • https://doi.org/10.1061/9780784412084.0025
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784412084
• Supplemental Notes:
  • © 2012 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Siegel, Timothy C
• Conference:
  • GeoCongress 2012
  • Location: Oakland California, United States
  • Date: 2012-3-25 to 2012-3-29
• Publication Date: 2012-3

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 333-348
• Monograph Title: Full-Scale Testing and Foundation Design: Honoring Bengt H. Fellenius

Subject/Index Terms

• TRT Terms: Augers; Axial compression; Cast in place structures; Cone penetrometers; Excavation; Geotechnical engineering; Load tests; Sand; Support piles
• Subject Areas: Bridges and other structures; Construction; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls; I53: Construction of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01529949
• Record Type: Publication
• ISBN: 9780784412084
• Files: TRIS, ASCE
• Created Date: Jul 1 2014 5:28PM