May 2024 CGS-SOS Lecture : "Geotechnical Properties of Glacial Deposits"

Lecture :

• 5:00 PM – Cocktails and Socializing
• 6:00 PM – Dinner
• 7:00 PM -8:30 PM- Lecture

Abstract:
This presentation introduces an inverse analysis method to calibrate the soil model parameters precisely and reduce the project risks. Currently, the numerical methods have been routinely applied in geotechnical engineering practice. However, the most challenging issue is the suitable soil model and its model parameters to reflect the non-linear stress-strain behavior of geomaterials. Glacial deposits covering the majority of the lands in Canada are one of the most challenging geomaterials in the world. Their wide range of grain sizes makes them not fall clearly into either cohesive or cohesionless soils used in the geotechnical textbooks. The inverse analysis presented here was carried out by integrating UCODE, a versatile inverse modeling tool, with the finite element software. A finite element model was built to simulate the laboratory or field tests and obtain the simulated stress-strain or deformation curve. UCODE was able to adjust the model parameters to their optimized values by minimizing the discrepancies between the simulated curve and the tested one. The whole calibration process was automatically conducted by using Macros. In this presentation, a few examples will be shown to calibrated the Hardening Soil model parameters using oedometer and pressure-meter tests. The method was applied to the main soil types in the City of Toronto. Distinct model parameters were obtained for these soil types. The developed calibration process can be used to obtain an accurate simulation of geotechnical structures and reduce the project risks.

Dr. Jinyuan Liu:

Dr. Liu is working as a Professor at Toronto Metropolitan University (formerly Ryerson University). He is trained with two doctorate degrees in Geotechnical Engineering (New York University and Tongji University) and MASc and BEng in Structural Engineering. Before joining Ryerson in 2007, he had worked for five years in the United States on two high-profile tunnel projects and one year in China. He is one of the pioneer researchers in developing transparent soil modeling techniques. Currently, he is working in Applied Geotechnical research, including deep soil mixing in treating sensitive Champlain Sea clay, characterizing geotechnical properties of glacial deposits, and improving pile design in glacial deposits. He has been active in the Canadian Geotechnical Society (CGS) at both local and national levels and served as Chair of CGS-SOS, Chair of the CGS-Education Committee, and Vice Chair of the Technical Committee for the 2021 GeoNiagara CGS Annual Conference.

Notes:

• All attendees are eligible for 2 hours of PEO Continuing Professional Development (CPD) hours
• There is a maximum of 10 tickets available for students,
• No refund is possible from 24 hours to the start of the event.
• Eventbrite's fee is nonrefundable.

• In case of cancellation due to unforeseen circumstances, such as government mandated COVID-19 protocols, the event may be held at a later date, or switched to a virtual presentation.
• Sponsorship tickets do not include a patron ticket.

Event Venue & Nearby Stays

Da Vinci Banquet Hall, 5732 Highway 7, Vaughan, Canada