Optimization Techniques In Non-Circular Probabilistic Slope Stability Analysis Considering Spatial Variability
Sina Javankhoshdel, Brigid Cami, Ramin Mafi, Thamer Yacoub, Richard J Bathurst
In the proceedings of: GeoEdmonton 2018: 71st Canadian Geotechnical Conference; 13th joint with IAH-CNCSession: Landslides and Geohazards III
ABSTRACT: Probabilistic analysis of slopes with several random variables, complex geometries, and spatial variability of soil properties can be carried out using a non-circular random limit equilibrium method (RLEM) search together with an optimization technique. Two optimization techniques are coupled with non-circular slope stability analysis in this paper: 1) the wide-spread Monte Carlo optimization (MCO) technique, and 2) a new surface altering optimization (SAO) method. Both approaches are used to minimize the factor of safety for a given slip surface by modifying its geometry. The SAO approach is a local optimization method which offers flexibility to find the geometry of a critical slip surface using spline curves. In this paper, the results of probabilistic analysis of a tailings dam model using no optimization, optimization using MCO, and optimization using SAO are compared. Results show that the SAO approach can capture more failure paths resulting in larger computed probabilities of failure, and is five times faster than the MCO approach.
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Javankhoshdel, Sina, Cami, Brigid, Mafi, Ramin, Yacoub, Thamer, Bathurst, Richard J (2018) Optimization Techniques In Non-Circular Probabilistic Slope Stability Analysis Considering Spatial Variability in GEO2018. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Javankhoshdel_GEO2018_150,
author = {{Javankhoshdel, Sina}, {Cami, Brigid}, {Mafi, Ramin}, {Yacoub, Thamer}, {Bathurst, Richard J}}
title = {Optimization Techniques In Non-Circular Probabilistic Slope Stability Analysis Considering Spatial Variability}
booktitle = {Proceedings of the 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC }
year = {2018}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {Optimization Techniques In Non-Circular Probabilistic Slope Stability Analysis Considering Spatial Variability}
booktitle = {Proceedings of the 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC }
year = {2018}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }