Keynote lecture
Pressuremeter and Deep Foundations in Intermediate Geo-Materials
Jean-Louis Briaud
Professor Briaud received his Diplome D’Ingenieur in France in 1972, and his Ph.D. from the University of Ottawa in Canada in 1979. In 1978, he joined the faculty at Texas A&M University and rose to his current title of Distinguished Professor and Holder of the Buchanan Chair. Dr. Briaud was President of the ASCE Geo-Institute, President of ISSMGE, and President of ASCE. He is the author of two books, one on the pressuremeter and one on geotechnical engineering; he has published over 300 technical papers, reports, manuals, and associated software. Among other awards, Professor Briaud has received the ASTM Hogentogler Award, the ASCE Distinguished Membership, the Cross Canada Lecture Award, the CGS Meyerhof Foundation Engineering Award, and the ASCE Ralph B. Peck Award. He has delivered invited lectures in over 60 countries.
High Resolution Pressuremeters – the value of measuring very small movement
John Hughes and Robert Whittle
John Hughes is an engineer and theorist and has been involved with Pressuremeter design and analysis since 1969, initially at Cambridge University. He started by taking the ideas and products of Ménard and transformed them with electronics and fundamental analysis. The best known of his devices is the Cambridge Self Boring Pressuremeter. For over 40 years he ran a company that carried out field work using Pressuremeters worldwide and in all climates and terrains.
The result has been the development of tools and solutions that allow the direct determination of the in-situ properties of soil and rocks, without requiring empirical correlations. Much of this was done in collaboration with Cambridge Insitu Ltd. He has published extensively on the subject of the Pressuremeter test and its interpretation
.Robert Whittle is part owner of Cambridge Insitu Ltd (CI) and has been associated with the company since 1978. He has a background in electronics and his initial involvement concerned the production of ancillary equipment for the Self Boring Pressuremeter.
As CI evolved into a service provider as well as manufacturer, he became expert in pressuremeter testing and analysis, operating globally on sites worldwide, including off-shore. He has published many conference and journal papers on aspects of the Pressuremeter test and interpretation. His particular interest is the stress and strain dependency governing the unload/reload response of the ground.
Use of database and pressuremeter for foundations design in France – The contribution of the French project ARSCOP
Sébastien Burlon and Philippe Reiffsteck
Sébastien Burlon is a Technical Manager at Terrasol (Setec group), a major consultancy in geotechnical engineering in France and abroad. He has been involved since the beginning of his career in many projects on various geotechnical structures: bridges, high-rise towers, nuclear power plants, off-shore structures, etc. He has participated or directed several research projects in France and Europe, such as swelling-shrinkage of clays (ARGIC), piles under cyclic loads (SOLCYP), geothermal energy (GABI), and pressuremeter tests (ARSCOP). He has been involved in standardisation work both in France and in Europe for 15 years, especially in the development of the Second Generation of Eurocode7 (leader of two project teams).
Dr. Philippe Reiffsteck received his Master of Science in Civil Engineering from CUST School of Engineering, France, in 1992 and his Doctorate in Civil Engineering from Blaise Pascal University, France, in 1996. He is currently a senior researcher at the University Gustave Eiffel, France, in charge of the laboratory of soil mechanics and special in situ testing. His scientific projects aim to improve existing knowledge on physical phenomena involved in the interaction of structures with the supporting soil. He has coordinated numerous research works in the field of foundation, natural hazards, in situ testing and has also been working on improving and implementing different geotechnical field tests, including: self-boring pressuremeter, special samplers, cone loading tests, Permeafor and Measuring-While-Drilling. In recent years, he has been particularly involved in the European standardisation of tests (ISO TC182 and CEN TC341) and co-authored part 2 of Eurocode 7
Pressuremeter Testing and Characterization in Clay Shales and Mudstones
David Elwood
David Elwood is an Associate Professor in the Department of Civil, Geological and Environmental Engineering at the University of Saskatchewan. He holds an M.Sc. in Geotechnical Engineering from Queen’s University and a Ph.D. in Civil Engineering from the University of Alberta. David teaches a wide variety of geotechnical related courses at the University of Saskatchewan including foundation engineering, numerical modelling, site investigations and advanced soil mechanics. David’s research is primarily on in situ testing and site characterisation as well as characterisation and the performance of heavily overconsolidated soils and soft rocks.
David has published on the topic of soil mechanics, site instrumentation and in situ testing, site characterisation and is currently on the editorial board of the Canadian Geotechnical Journal. David was also the lead author for the Site Investigations chapter of the 2023 Canadian Foundation Engineering Manual. In addition, He is an active consultant nationally and internationally for over 25 years. He has extensive experience with site characterisation and development of material properties for a wide range of geo-materials. His research has focused on the characterisation of hard, overconsolidated soils and soft rocks for a variety of applications, including tunnelling, embankment construction, deep excavations, pit wall stability, shallow and deep foundations and slope stabilization as well as characterization and stability of tailings.
Gambin Lecture : Improvement of the pressuremeter test. Nearly fifty years with Michel Gambin
Jean-Pierre Baud
Jean-Pierre Baud is a French geotechnician with a PhD from the University of Franche-Comté obtained in 1975, specializing in geological engineering. He is currently president of the company EUROGÉO, which he has managed since 1986. Previously, he held various positions of responsibility, notably as head of the “Ménard International Pressuremeter Surveys” department at Intrafor-Cofor and engineer at the LOUIS MÉNARD GROUP. Jean-Pierre participated at Ménard in the development of the PAC, the first automated Ménard pressuremeter in 1983, then in the development by the companies from the Ménard group, Géomatech and Apagéo, of successive generations of recording pressuremeters up to the Géopac, the first type C pressuremeter, with regulation and automation of the various protocols of current standards. With Michel Gambin, he developed the hyperbolic model of the pressuremeter curve, as well as the Pressiorama diagram allowing a direct deduction of the rheological coefficient a(alpha) of L. Ménard.He is an active member of several scientific organizations, including the French Geological Society and committees on soil and rock mechanics, and he serves as an expert on European and international standardization committees for borehole expansion tests. Author of around 30 publications primarily focused on pressuremeter methods, he is a recognized figure in the field of geotechnics..