The six keynote Keynote Speaker Stephan Jefferis speakers were also honored by being chosen for excep- tional performance and knowledge in their conference subject area. Their names and topics follow: • Stephan Jefferis, Environmental Geotechnics, Ltd, Cement-Bentonite Slurry Systems • David Wilson, Gannett Fleming, Practice, Perspectives & Trends in U.S. Rock Grouting • George Burke, Hayward Baker, State of the Practice of Jet Grouting • George Filz, Virginia Tech, Design of Deep Mixing for Support of Levees and Floodwalls • Cliff Kettle, Bachy Soletanche, Compensation Grouting, Evolution, Field of Application and Current State of Art in UK Practice • Michael Byle, Tetratech EC, Inc., and James Warner, Consulting Engineer, Limited Mobility Grouting-Past, Present and Future Encyclopedic Subject Range The conference tracks were Grouting and Deep Mixing for Tunneling, Highways and Transportation, Structural Support and Dams. Speakers also addressed performance, analysis and design, grouting applications and new equipment and technologies. Advances in instrumentation and data acquisition were noted frequently as speakers looked back over the years since 2003, the last ICOG meeting. Many papers also focused on progress and research on dealing with Karst formations. Burke, in his keynote address on jet grouting, said there had been a “dramatic” change in data acquisition, noting the electric cylinder method as one new method. Speaker Richard Hanke of Malcolm Drilling spoke of a “full suite” of electronic data collection in real time at a Seattle site. Burke also mentioned data collection was used in the demonstration project at Tuttle Creek by the Corps of Engineers. Other speakers alluded to Wolf Creek Dam as a workshop Pete Cali and Milton Gomez hydrostatic pressure of 540 psi in almost freezing temperatures. Another was a tunnel in Modena, Italy, at which 75% of the tunnel lining was repaired under water using bentonite panels. An unusual Hot Bitumen grouting in Canada was one of the many presentations focusing on Karst formations. Devon Mothersille from the U.K., spoke about a tunnel in Australia at which all 5,200 grouted anchors were corroded and had to be remediated. The testing and remediation, led to a 9-year lawsuit and multi-million dollar (AUD) settlement. From Finland, the case history of grouting in crystalline fractured bedrock to nuclear waste containment was presented and from Portugal, a jet grouting application for load transfer at a resort on the Tagus River to ICOG Sponsors Atlas Copco Bauer Pileco Gannett Fleming Geo-Foundations Contractors Hayward Baker International Drilling Equipment Magnus Pacific Moretrench Mueser Rutledge Consulting Engineers RST Instruments Russo DEEP FOUNDATIONS • MAY/JUNE 2012 • 17 for information on jet grouting and other cut-off wal l techniques. Ground improvement and grouting applications were described for mitigation of liquefaction, nuclear waste containment and seismic remediation. Compensation grouting, Cliff Kettle’s keynote subject, is “not easy and not cheap,” typically used as a last resort for historic structures or emergency situations. Stephan Jefferis traced his work using blast furnace slag-fly ash in grouts over the years, while Helen Robinson, Schnabel Engineering, spoke about her research in polyethurene grouts. Other addresses were diverse and included case histories from around the globe. One example from Norway was the use of accelerated cement to stop inflow under allow for cruise ships. New and smaller equipment for deep soil mixing from Italy was described by professors from the University of Naples. Daniele Vanni, Milan talked about a deep soil mixing solution used to restore the listing campanile in Venice’s San Marco Piazza. Similarly, cutter soil mixing applications all over the world, were presented by Franz Werner Gerresen, of Bauer Maschinen. The presentations mentioned here are a small fraction of the total ICOG papers, which will be published in August 2012 by ASCE. ICOG attracted over 20 cooperating organizations, over 70 exhibitors and 10 Poster presentations. DFI’s management of the vast event was an enormous and successful undertaking.
