DFI Technical Committee Chairs Augered Cast-in-Place Pile Morgan NeSmith, P.E. Berkel and Company Contractors Codes and Standards Daniel Stevenson, P.E. Berkel and Company Contractors Deep Foundations for Landslides/Slope Stabilization Chris Ramsey, P.E. Amec Foster Wheeler Environmental & Infrastructure Drilled Shaft Paul Axtell, P.E., D.GE Dan Brown and Associates Driven Pile Ben Vance, P.E. Strata Ground Improvement Tanner Blackburn, Ph.D., P.E. Hayward Baker Helical Piles and Tiebacks Gary Seider, P.E. Hubbell Power Systems/Chance Manufacturers, Suppliers and Service Providers Mark Bryant, EIT MacLean Power Systems Civil Division Marine Foundations Rick Ellman, P.E. Mueser Rutledge Consulting Engineers Micropile Steve Davidow, P.E., S.E. Quanta Subsurface Seismic and Lateral Loads Kwabena Ofori-Awuah, P.E. KCI Technologies Slurry Wall Giovanni Bonita, Ph.D., P.E., P.G. GEI Consultants Soil Mixing David Miller, P.E. ADM Consulting Subsurface Characterization for Deep Foundations Victor Donald, P.E. Terracon Sustainability Carlos Englert, P.E. Terracon Testing and Evaluation Gerald Verbeek Allnamics Pile Testing Experts Tiebacks and Soil Nailing Ed Laczynski, P.E. G.A.& F.C. Wagman Women in Deep Foundations Helen Robinson, P.E. GEI Consultants Working Group Chairs Electric Power Systems Foundations Peter Kandaris, P.E. DiGioia Gray & Associates Steve Davidow. P.E., S.E. Quanta Subsurface Energy Foundations Tony Amis GI Energy Guney Olgun, Ph.D. Virginia Tech Seepage Control Michael Kynett, P.E. U.S. Army Corps of Engineers 74 • DEEP FOUNDATIONS • MAY/JUNE 2015 The following companies graciously provided sponsorships of the WiDF Com- mittee through this event, including GAI Consultants, geotechnica, Equipment Corporation of America, Menard and Nicholson Construction Company. ACIP and DD Piles Short Course DFI’s Augered Cast-in-Place (ACIP) Pile Committee presented a one-day short course for the ASCE Pittsburgh Geotech- nical Section on the current state of the practice of ACIP and Drilled Displacement (DD) pile foundations. The 7.5-hour course included presentations by multiple members of DFI’s ACIP Piles Committee that focused on current design, construction, and quality control and assurance methods. This short course was the first in what DFI hopes will be many short courses presented to ASCE Sections by DFI Committees. The feedback from the attendees was overwhelmingly positive, with one attendee describing the event as “One of the best, and most useful short- courses I have attended. I took a lot away.” Preparing and delivering this short course meets the goals of the Memorandum of Understanding between DFI and Geo- Institute to actively pursue positive ways to work together to bring practical technical content to local Geo-Institute members. The following presentations were delivered. • Morgan NeSmith, P.E., of Berkel and Company Contractors and chair of the DFI ACIP Piles Committee, presented the development of ACIP and DD equipment, materials and installation techniques. Typical grout components, mix designs, compressive strengths, steel design and placement consider- ations were addressed. Field and testing methods and good sample collection, handling and storage practices were discussed. NeSmith also described the common design methods and provided commentary on the methods based on his extensive experience with load test results vs. predicted performance. He highlighted local and regional case histories using ACIP and DD piles for various applications. • John McElroy, P.E., of Langan Engineer- ing and Environmental Services, presented best practices for quality control and assurance, automated monitoring equipment, testing methods and documentation. • Dr. Alec McGillivray, P.E., of Nicholson Construction Company, delivered a detailed presentation on the evaluation of load tests for ACIP piles, including automating the interpretation using curve fitting with the Chin hyperbola for capacity, and polynomial fitting to the nonlinear grout modulus for the strain gauge analyses. • Bernie Hertlein, FACI of GEI Consul- tants, introduced the current commer- cially available nondestructive test (NDT) methods for deep foundations, reviewed their operating principles, and applied their various capabilities and limitations to ACIP and DD piles. • Tim Siegel, P.E., D.GE, of Dan Brown and Associates, presented a provocative discussion about designer challenges based on his experience to help geotechnical engineers, designers and contractors consider practical aspects for valuable designs. • John Anderson of Specrete-IP described how water retention in grouts can cause premature setting that inhibits case installation. The presentation showed that grouts can be designed to retain water even under the pressure of their own weight pushing the water into the surrounding soil and from the suction of the capillary action from that soil. • Jonathan Huff, P.E., of Goettle, described an ACIP case history highlighting the economy, design and constructability of the expansion of the Fargo, N.D., water treatment plant. • Dr. Antonio Marinucci, M.B.A., P.E., of V2C Strategists, presented an overview of DD piles, including descriptions of the vari- ous types of displacement piles, applica- bility of the technology, and general requirements for types of equipment and tooling needed, highlighted by prac- tical examples and mini case histories. ASCE Sections interested in working with DFI to deliver this short course or to develop similar courses on deep foundations tech- niques should contact Mary Ellen Bruce Large, P.E., D.GE, at [email protected].
