Optimizing the use of the thermal integrity system for evaluating auger-cast piles : final report.

Details

• Creators:
  Mullins, Gray ; Johnson, Kevin
• Corporate Creators:
  University of South Florida. Department of Civil and Environmental Engineering
• Contributors:
  Horhota, David
• Corporate Contributors:
  Florida. Department of Transportation
• Subject/TRT Terms:
  • Alternatives analysis
  • Augers
  • Cast in place structures
  • Evaluation
  • Field tests
  • Foundations
  • Instrumentation
  • Optimization
  • Performance measurement
  • Piles (Supports)
  More +
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Florida
• Edition:
  Final report
• Corporate Publisher:
  Florida. Department of Transportation. Research Center
• Abstract:
  Auger-cast piles (sometimes called auger-cast-in-place, or ACIP, piles) are a subset of the larger ; category of deep foundation elements known as bored piles. Although similar to drilled shafts at first ; glance, ACIP piles differ in the construction processes and design capacity. Therein, ACIP piles ; require no slurry or casing to hold open the excavation; rather, a continuous flight auger is used which ; maintains the stability and volume of the excavation via the soil that fills the auger flights. In this ; regard, no means of inspecting the dimensions of the borehole is provided and the as-built pile ; dimensions can only be inferred from grout pumping logs. The resultant shape of the foundation ; element is further dependent on the rate of auger extraction relative to the grout pumping rate. With ; this in mind, there is concern of the as-built shape and integrity. As such, use of ACIP by the Florida ; Department of Transportation (FDOT) has been limited to foundations for sound walls. ; The thermal integrity test has proven to be an effective method to evaluate the integrity of newly ; constructed drilled shafts (i.e. identifying anomalies, rebar cage alignment, concrete cover, etc.). ; However, very few auger-cast piles have been tested with this method as standard integrity access ; tubes are not typically installed. If an improved quality assessment tool is developed to ascertain the ; final, as-built configuration (size, depth, diameter, concrete cover, etc.) of auger-cast piles, their use in ; other applications can be reevaluated. The results of this study showed the limitations of various ; instrumentation schemes and introduced alternate analysis methods specific to ACIP piles.
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• Format:
  PDF
• Funding:
  BDV25-977-09
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/30983/dot_30983_DS1.pdf
• File Type:
  [PDF - 26.37 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:6093f8647214ebf888ee8a52131ce0851d8f7f5816a581d83910d4242fc6bc33