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Geotechnical Engineering Circular (GEC) No. 8: Design and Construction of Continuous Flight Auger Piles - Softcover
Synopsis
The purpose of this document is to develop a state-of-the-practice manual for the design and construction of continuous flight auger (CFA) piles, including those piles commonly referred to as augered cast-in-place (ACIP) piles, drilled displacement (DD) piles, and screw piles. An Allowable Stress Design (ASD) procedure is presented in this document as resistance (strength reduction) factors have not yet been calibrated for CFA piles for a Load Resistance Factored Design (LRFD) approach. The intended audience for this document is engineers and construction specialists involved in the design, construction, and contracting of foundation elements for transportation structures. CFA piles have been used in the U.S. commercial market but have not been used frequently for support of transportation structures in the United States. This underutilization of a viable technology is a result of perceived difficulties in quality control, and the difficulties associated with incorporating a rapidly developing (and often proprietary) technology into the traditional, prescriptive design-bid-build concept. Recent advances in automated monitoring and recording devices will alleviate concerns of quality control, as well as provide an essential tool for a performance-based contracting process. This document provides descriptions of the basic mechanisms involving CFA piles, CFA pile types, applications for transportation projects, common materials, construction equipment, and procedures used in this technology. Recommendations are made for methods to estimate the static axial capacity of single piles. A thorough evaluation and comparison of various existing methods used in the United States and Europe is also presented. Group effects for axial capacity and settlement are discussed, as well as lateral load capacities for both single piles and pile groups. A generalized step-by-step method for the selection and design of CFA piles is presented. Quality control (QC)/quality assurance (QA) procedures are discussed, and a performance specification is provided. This generic specification may be adapted to specific project requirements. A list of the references used in the development of this manual is presented. These references include the key publications on the design of augered pile foundations. Existing Federal Highway Administration (FWHA) and American Association of State Highway Officials (AASHTO) publications that include engineering principles related to the subject of CFA piles are also included in the references.
"synopsis" may belong to another edition of this title.
- PublisherCreateSpace Independent Publishing Platform
- Publication date2007
- ISBN 10 1466246677
- ISBN 13 9781466246676
- BindingPaperback
- LanguageEnglish
- Number of pages292
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