CONTENTS FEATURES I DFI Executive Director Theresa Engler [email protected] Executive Editor Barbra Rodriguez [email protected] Managing Editor and Advertising Manager Karol Paltsios [email protected] Graphic Design Faye Klein Staff Photographer Herb Engler DFI Executive Committee President Matthew Janes, P.Eng. Vice President Michael H. Wysockey, Ph.D., P.E. Secretary Gianfranco Di Cicco James O. Johnson Treasurer Past President Dan Brown, Ph.D., P.E., D.GE Other Trustees Franz-Werner Gerressen, Dipl.-Ing. Peter Faust, Dipl.-Ing. Conrad W. Felice, Ph.D., P.E. Mike Kelley K.S. Rama Krishna, Ph.D. Anne Lemnitzer, Ph.D., P.E. Dan MacLean, P.E. J. Erik Loehr, Ph.D., P.E. Matthew E. Meyer, P.E. Howard Perko, Ph.D., P.E. David Paul, P.E. Morgan NeSmith, P.E. Lori Simpson, P.E., G.E. Martin G. Taube, P.E., P.G. Thomas D. Richards, P.E., D.GE Stefano Valagussa 71 Member Profile: Yuderka Trinidad Gonzalez, Ph.D. Candidate, on a Dynamic Path DEEP FOUNDATIONS • JULY/AUG 2020 • 3 Richard Shea III 75 CFA Piles for Warehouse Mezzanine In a warehouse retrofit in Georgia, a specialty foundation contractor developed a continuous flight auger (CFA) foundation option to increase load capacity for a new mezzanine level. The lower portions of 84 support columns were replaced with wider flange columns reinforced by CFA-foundation elements to shore up the mezzanine for storage and office space use. While improving support for the elevated area within the facility, the approach also reduced construc- tion expenses about 25% and expedited project completion. 16 Sonic Drilling for Infrastructure Rehab COVER STORY Jim McCombs ® Sonic drilling use has grown to include applications such as the installation of instruments, foundation relief wells, micropiles in contaminated soils, angled wells and freeze piles. Using infrastructure retrofit projects at a dam, sea wall, and landfill as examples, the author demonstrates sonic’s versatility and its minimal site impact while creating very tight tolerance, fully cased boreholes at various angles. Sonic also offers the advantages of small equipment size and an ability to drill through many formations and fill without depth refusal. O T N A S D I N N S U T O I T F U E P T E E D
