CGS Kingston Section
Graduate Candidate Competition for Michael Bozozuk Student Forum
Student Entries from Kingston: RMC and Queen’s University
Queen’s University
Candidate: Mr. Prabeen Joshi
Title of Presentation: Performance of geosynthetic clay liner (GCL) overlaps under non-uniform stresses.
Abstract:
A composite geosynthetic liner consisting of a geomembrane (GMB) on top of a geosynthetic clay liner (GCL) can be very effective to limit leakage though landfill barrier systemshowever if not covered quickly and non-uniform stresses are applied, additional issues may arise that may increase leakage through the composite liner. This presentation will summarize a latest research conducted to quantify the leakage that occurs when a GMB wrinkle with defect (i.e holes/cracks) overlies a GCL overlap.Comparisonbetween performance of self-seaming and non-self-seaming GCLs will also be presented.
Bio:
Mr Prabeen Joshi is from Kathmandu, Nepal. He conducted his undergraduate degree at Tribhuwan University in Nepal and obtained an M.Sc from the University of Lueneburg in Germany. Currently, he is a PhD candidate under the supervision of professors Dr. Kerry Rowe and Richard Brachman and the focus of his research in on the hydraulic performance of containment liners.
Royal Military College of Canada
Candidate: Mr.SinaJavankhoshdel
Title of Presentation:Simplified probabilistic slope stability design charts for cohesive and c-soils
Abstract:
Design charts to estimate the factor of safety for simple slopes with cohesive and c- soils are now available in the literature. However, factor of safety is an imperfect measure to quantify the margin of safety of a slope because nominal identical slopes with the same factor of safety can have different probabilities of failure due to variability in soil properties. In this presentation a series of new probabilistic slope stability design charts are provided that consider a practical range of coefficient of variation (COV) for cohesive and frictional strength parameters of the soil. The data to generate the new charts were produced using conventional probabilistic concepts together with closed-form solutions for cohesive soil cases and Monte Carlo simulation in combination with conventional limit equilibrium-based circular slip analyses using the program SVSlope for c- soil cases. The charts are a useful tool for geotechnical engineers to make a preliminary estimate of the probability of failure of a simple slope without running Monte Carlo simulations. Effect of spatial variability of soil properties and also effect of cross-correlation between strength parameters on probability of failure are also provided in the presentation.
Bio:
MrSinaJavankhoshdelis from Iran. He obtained his bachelor and master’s degrees in structural engineering from Iran at the University of Tehran. He is a PhD Candidateworking at RMC under the supervision of Professor Richard Bathurst.His research area is in probabilistic slope stability analysisofunreinforcedand geosyntheticreinforced slopes.