| Title | Geotechnical Engineering Circular No. 8 Design and Construction of Continuous Flight Auger (CFA) Piles |
|---|---|
| Record ID | 66284 |
| Personal Name Creator |
Brown, Dan A.; Dapp, Steven; Thompson, W. Robert; Lazarte, Carlos A. |
| Personal Name Contributor |
DiMaggio, Jerry A.; Nichols, Silas |
| Corporate Creator | GeoSyntec Consultants |
| Corporate Contributor |
United States. Federal Highway Administration. Office of Technology Applications; United States. Federal Highway Administration. Office of Engineering |
| Publisher | United States. Federal Highway Administration. Office of Technology Applications |
| Publication Date | 20070401 |
| Language | English |
| Abstract | 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. |
| Rosap ID | dot:40557 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/40557 |
| TRT Terms | Foundations; Piles (Supports) |
| Geographical Coverage |
United States |
| Report Number | FHWA-HIF-07-003 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/66000/66200/66284/FHWA-HIF-07-003.pdf |
| Format | |
| Database | NTL Digital Repository |