Geotechnical Engineering Circular No. 8 Design and Construction of Continuous Flight Auger (CFA) Piles

This manual presents the state-of-the-practice for design and construction of continuous flight auger (CFA) piles, including those piles commonly referred to as augered cast-in-place (ACIP) piles, drilled displacement piles, and screw piles. CFA pile types, materials, and construction equipment and procedures are discussed. A performance-based approach is presented to allow contractors greater freedom to compete in providing the most cost-effective and reliable foundation system, and a rigorous construction monitoring and testing program to verify the performance. Quality control (QC)/quality assurance (QA) procedures are discussed, and general requirements for a performance specification are given. Methods to estimate the static axial capacity of single piles are recommended based on a thorough evaluation and comparison of various methods used in the United States and Europe. Group effects for axial capacity and settlement, and lateral load capacities for single piles and pile groups are discussed. A generalized step-by-step method for selecting and designing CFA piles is presented, along with example calculations. An Allowable Stress Design (ASD) procedure is used.

  • Record URL:
  • Corporate Authors:

    GeoSyntec Consultants

    10015 Old Columbia Road, Suite A-200
    Columbia, MD  United States  21046-1760

    Federal Highway Administration

    Office of Technology Applications, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    Federal Highway Administration

    Office of Engineering, Bridge Division, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Brown, Dan A
    • Dapp, Steven D
    • Thompson III, W Robert
    • Lazarte, Carlos A
  • Publication Date: 2007-4


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Technical Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 293p

Subject/Index Terms

Filing Info

  • Accession Number: 01710436
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-HIF-07-03
  • Created Date: Jun 17 2019 1:12PM