Sponsored by the Geo-Institute Boston Chapter
Thursday, May 19, 2022
Registration and Social: 5:00 PM at Alumni Center, 716 Columbus Ave, 6th Floor, Boston, MA
Presentation: 7:00 PM at ISEC Auditorium, 805 Columbus Ave, Room 102 ISEC, Boston, MA
Don J. DeGroot, ScD, PE
Professor, University of Massachusetts Amherst
Professor Charles C. Ladd made significant contributions to our understanding of soil sample disturbance and the effects of poor-quality sampling on geotechnical engineering design. Sample disturbance causes changes in the natural soil state, and as a result key design parameters such as compressibility, yield stress and shear strength can be impacted. This lecture describes the current state of knowledge and practice in sampling of fine-grained soils. Each stage of the sampling process, from initiation of drilling to final preparation of laboratory test specimens, causes potential disturbance to samples and is described. Practical solutions during sampling are presented that can, if properly implemented, reduce the degree of sample disturbance. Qualitative and quantitative methods of assessing sample quality and laboratory mitigation strategies are also described. The lecture concludes with an overview of best practice recommendations for integrated site characterization programs for conduct of field operations (drilling, sampling, in situ testing) and laboratory work to enable reliable selection of soil parameters for establishing a design basis.
Don J. DeGroot is a geotechnical engineer and professor at the University of Massachusetts Amherst. He received his Doctor of Science degree in Civil Engineering at the Massachusetts Institute of Technology in 1989. He was a Research Council of Norway Guest Researcher Fellow at the Norwegian Geotechnical Institute in 1997 and a Gledden Visiting Senior Fellow at the University of Western Australia in 2005. His teaching, research and consultancy experience is primarily in soil behavior with an emphasis on field and laboratory measurements for geotechnical engineering site characterization programs. He has been a Principal/Co-Principal Investigator on numerous geotechnical engineering research projects that included research on drilling and sampling of soils, in situ testing, laboratory measurement of soil behavior, and selection of soil design parameters. His work in this area has been published widely in the leading geotechnical journals and international conference proceedings. He has trained two generations of students through his classroom teaching and research supervision, for which he has received several UMass Amherst awards.
Registration Deadline: Thursday, May 12, 2022
This is a free lecture.
Click here to see the event flyer. Register to attend this lecture in-person here, or virtually here. If you have questions regarding this event, contact Lucy Jen at Lucy.Jen@Tufts.edu or 617/642-0502.
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