GREGORY GEOTECHNICAL (GREGEO) was formed by Garry H. Gregory, Ph.D., P. E., D.GE in April 1998, in Fort Worth, Texas. Our offices were relocated to Stillwater, Oklahoma in August 2002. At the time GREGEO was established, Dr. Gregory had more than 32 years of civil/geotechnical engineering and construction management experience, and had been in key positions with major geotechnical and civil engineering firms. His past employment included positions as Principal with the firm of Freese and Nichols, Inc., and Vice President and Senior Geotechnical Consultant with Fugro-McClelland, Inc. Our offices were relocated to Stillwater, Oklahoma to be more centrally located to our National service area and client base, and to establish Dr. Gregory’s association with Oklahoma State University.
GREGEO was established to provide high-level geotechnical engineering and consulting on complex and specialized projects to a broad range of clients on a National basis. Oklahoma and Texas remain our most active service areas, although GREGEO has provided professional services on projects in 7 states, to date. GREGEO historically provided full service geotechnical engineering consisting of field exploration, geotechnical instrumentation, laboratory testing, and analyses, and maintained our own advanced geotechnical engineering laboratory at our Stillwater facility.
GREGEO now provides geotechnical engineering consulting and analysis on complex and specialized projects covering a broad range of geotechnical applications, including forensic analysis. We also provide consulting on specialty geotechnical laboratory testing. Our main specialty areas include slope stability analysis and stabilization, large retaining walls, earth retention systems, subsurface stabilization, soil-pipe interaction analyses of large water transmission pipelines, and deep foundations. We perform complex soil-structure interaction analyses on a regular basis. We are experienced in design, installation techniques, and monitoring requirements for geotechnical instrumentation such as settlement cells, vibrating wire piezometers, and slope inclinometers, among others. GREGEO has a full complement of the latest geotechnical engineering software including software for performing slope stability analysis, finite-element soil-structure interaction and seepage analysis, generation of computer soil boring logs and test reports, settlement analysis, stress analysis in soil masses, finite-element soil-pipe interaction analysis, stress-strain analysis for tunnels and embankments, rock mechanics analysis, pavement analysis and design, and the latest office support software. Dr. Gregory is the author of several advanced geotechnical engineering software programs regularly used in our analyses.