DFI Journal: Volume 13, Issue 1 Available The most recent edition of the DFI Journal, Volume 13, Issue 1, is now available. papers that were presented at DFI's 43 This issue includes the following rd Annual Conference and the DFI 2018 Student and Young Professor Paper Competitions: • “Performance Assessment of Wave Equation Analysis for Driven Steel H- Piles in IGM,” by Pramila Adhikari and Yrgalem Z. Gebreslasie, University of Wyoming, 2018 Student Paper Competition, Honorable Mention • “Torsional Resistance of Drilled Shaft Foundations: A State of The Art,” by Victor Hugo Aguilar Vidal, Auburn University • “Estimating Capacity and Reliability of Existing Foundations for Evaluation of Reuse,” by Andrew Boeckmann, P.E., University of Missouri, 2018 DFI Young Professor Paper Competition, Runner up • “Lateral Forces on Pile Due to Soil Slope Creep,” by David E. Albus, G.E., and Bidjan Ghahreman, Ph.D., G.E., Albus- Keefe & Associates • “Modified Strong Rock P-Y Curves for Rock-Socketed Pile Shafts,” by Arash Khosravifar Ph.D., P.E., Portland State University An online subscription to the DFI Journal is included with DFI membership, and issues can be accessed by signing in to the member portal — MyDFI. Members and non- members can order printed copies of the 2007-2013 volumes of the Journal from the ‘Publications’ page of www.dfi.org; members at preferential rates. DFI is accepting orders for printed copies of the 2020 Journal volumes through March 1, 2020.Contact [email protected] for information about DFI Journal subscriptions. Book the 2019-2020 Traveling Lecturer DFI Traveling Lecturer, Willie M. NeSmith, P.E., former chief geotechnical engineer for Berkel & Company Contractors, is available to present a series of lectures to university students, professional groups and industry associations. The lecture series runs through August 31, 2020. To request the DFI Traveling Lecturer to speak at your event, contact [email protected] or visit www.dfi.org/awardslectures.asp?traveling. Following are the 2019-2020 lecture series topics: Fundamentals of Cast-in-Place Piles: This lecture examines the development and evolution of cast-in-place piles in the United States and Europe and describes current industry equipment and installation practice. Conventional continuous flight auger (CFA) and drilled displacement piles are addressed. Drilled Displacement Pile Performance at a Site with Coastal Plain Overlying Residual Soil: This lecture is a case history of a project in Aiken, South Carolina, where both Coastal Plain soils and residual soils were encountered within the pile depths. Because of the difference in working grade across the site, the length of pile in each of the formation varied. After an extensive testing program, the installation process was modified to accommodate the variable response to displacement of the Coastal Plain and residual soils. DEEP FOUNDATIONS INSTITUTE Application of Cast-in-Place Piles in Intermediate Geomaterials: The dev- elopment of more powerful and robust installation platforms has made it feasible to install cast-in-place piles into materials once considered too resistant for the system. This lecture reviews current installation platforms and tooling, and presents case histories for installation in soft limestone, partially weathered rock, shale and glacial till. Design Methodologies for Cast-in-Place Piles: This lecture is an in-depth treatment of current design methodologies for cast-in- place piles. Conventional continuous flight auger (CFA) and drilled displacement piles are addressed. The Application of Drilled Displacement Elements for Lique- fication Mitigation and Foundation Improvement: When drilled displacement piles are installed in materials that exhibit granular behavior, there is a significant increase in density in the vicinity of the piles. The increase is most pronounced in loose to medium dense materials and can be utilized to mitigate liquefication and increase the foundation response stiffness of the mass of the material pene- trated. Case histories are presented wherein ground improvement elements were installed using drilled displacement pile processes to mitigate liquefaction and increase allowable foundation loading. DEEP FOUNDATIONS • SEPT/OCT 2019 • 57
