DFI Technical Committee Chairs Augered Cast-in-Place Pile Morgan NeSmith, P.E. Berkel and Company Contractors Codes and Standards Lori Simpson, P.E., G.E. Langan Treadwell Rollo Deep Foundations for Landslides/Slope Stabilization Prof. Vern Schaefer, P.E. Iowa State University Drilled Shaft Paul Axtell, P.E., D.GE Dan Brown and Associates Driven Pile Andrew Verity Terracon 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. Crux 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 Dennis Boehm Hayward Baker Subsurface Characterization for Deep Foundations Victor Donald, P.E. Terracon Sustainability Carlos Englert, P.E. Schnabel Engineering 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. Schnabel Engineering Working Group Chairs Electric Power Systems Foundations Peter Kandaris, P.E. DGA Consulting Steve Davidow. P.E., S.E. Crux Subsurface Energy Foundations Tony Amis GI Energy Guney Olgun, Ph.D. Virginia Tech Seepage Control David Paul, P.E. U.S. Army Corps of Engineers 74 • DEEP FOUNDATIONS • MAY/JUNE 2015 results will also be used to quantify the behavior of helical piles in a group for both pinned and fixed conditions. The rocking behavior of these pile groups will be analyzed to determine how much load is transferred to the helix level and how load distribution differs between piles in the same group. The effectiveness of steel shaft slenderness on pile dynamics, the contribution of the helix to overall capacity and rocking behavior, and pile group fixity will be evaluated. My blog of the testing p r o g r a m c a n b e v i e w e d a t http://cerato.ou.edu/category/blog/. Phase 3 will include analysis of the shake table testing results and development of a design report with readily imple- mentable recommendations. The report is expected to be completed in May 2017. Phase 4 of the project is anticipated to involve instrumenting piles for a building retrofit at the University of Canterbury in New Zealand and recording and analyzing data over time. Phase 5 will involve finite element modeling of helical piles under seismic conditions, preparing design guide- lines and recommendations for inclusion in IBC 2021, and a seismic design guide. The project is being funded in part by the DFI Committee Project Fund (see p. 29) and contributions from members of the DFI Helical Piles and Tieback Committee and other industry partici- pants. Over $151,000 has been collected and/or pledged to date for this work. In- kind contributions of helical piles, specialty hardware and labor and equipment, totaling well over $100,000 have been provided by Torcsill, Ram Jack and Magnum Piering. Additional funding of $150,000 is needed to support Phases 4 and 5. All financial and material contri- butions are gratefully acknowledged. Please visit the fundraising page at http://www.helicalpileworld.com/dfi_h elical_screw_pile_seismic_research_tes ting_ucsd_shake_table.html. COMMITTEE CHAIR MORGAN NESMITH, P.E. Augered Cast-in-Place Pile Committee Although augered cast-in-place (ACIP) piles are commonly used in highway construction for embankment, soundwall and MSE wall support, there remains reluctance among state agencies to approve the technology for support of bridge foundations. FHWA Geotechnical Circular 8, Design and Construction of CFA Piles, was developed to provide a framework for the inclusion of these piles in state-level highway foundation support. st At the 41 Southwest Geotechnical Engineers Conference hosted by the Kansas Department of Transportation, Olathe, Kan., May 9-12, 2016, I presented three relatively recent case-histories on behalf of the committee. The case-histories showcased projects where ACIP piles were us ed f o r br idg e - approach support, temporary support of a tower-crane for bridge construction, and the direct support of an elevated roadway in an urban area, respectively. Additionally, the presentation included recent developments in the areas of automated installation monitoring and nondestructive testing that can provide a level of certainty regarding the integrity of constructed ACIP piles to allow their inclusion as foundation support for all aspects of transportation projects.
