CONTENTS FEATURES I DFI DEEP FOUNDATIONS The Magazine of the Deep Foundations Institute (DFI) is published bimonthly by DFI. 326 Lafayette Avenue, Hawthorne, NJ, 07506, USA T: 973.423.4030 F: 973.423.4031 Email: [email protected] Executive Director Theresa Rappaport [email protected] Executive Editor Virginia Fairweather [email protected] Managing Editor Emeritus Manuel A. Fine [email protected] Advertising Manager Karol Paltsios [email protected] DFI Executive Committee President, Robert B. Bittner Vice President, Patrick Bermingham Secretary, Matthew Janes Treasurer, John R. Wolosick Past President, James A. Morrison Other Trustees David Borger Maurice Bottiau Dan Brown Gianfranco Di Cicco Rudolph P. Frizzi Bernard H. Hertlein James Johnson Douglas Keller Samuel J. Kosa Kirk A. McIntosh Raymond J. Poletto Michael Wysockey 61 How Micropiles Have Changed Foundation Engineering Helen D. Robinson Since Fernando Lizzi conceived the technology in the 1950s, micropiles have changed the way engineers design foundations. Micropiles reached North America in the 1970s, and their use grew in the mid-1980s. DFI has played a major role in the method’s adoption in the industry, but there are still challenges ahead, and suggestions for future improvements are offered. DEEP FOUNDATIONS • NOV/DEC 2013 • 3 12 The Evolution of Augered Cast-in-Place Piles Willie M. NeSmith, Alan Roach, W. Morgan NeSmith SPECIAL ISSUE :LANDMARKS Berkel & Company engineers offer a concise history of the 60-year evolution of augered cast-in-place piles and the technology’s impact on engineering practice. That history begins with patent applications in 1951, the spread of improvements and knowledge within the industry, partly through DFI efforts, and acceptance by public agencies. Today ACIP piles are a mature technology. SPECIAL ISSUE :LANDMARKS 53 A Brief History of Deep Mixing Methods Donald A. Bruce and George M. Filz The first systematic studies of deep mixing methods began in Japan in the 1960s. Today, after 27 years of applications in the U.S. and elsewhere, the technology is in robust health, according to the authors, both advocates of the method and pioneers in the field. They have been close observers of the methodology and its applications throughout its history. SPECIAL ISSUE :LANDMARKS O T N A S D I N N U S T O I F T U E P T E E D
