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Development of the scaled boundary finite element method for image-based slope stability analysis


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Wijesinghe, DR, Dyson, A ORCID: 0000-0002-5353-2962, You, G, Khandelwal, M, Song, C and Ooi, ET 2022 , 'Development of the scaled boundary finite element method for image-based slope stability analysis' , Computers and Geotechnics, vol. 143 , pp. 1-14 , doi: 10.1016/j.compgeo.2021.104586.

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This paper presents a numerical technique for geotechnical slope stability analysis, integrating digital image meshing with the scaled boundary finite element method, allowing site conditions such as complex stratigraphies, surface and internal geometry evolution to be simulated in a robust and straightforward procedure. The quadtree decomposition technique is used to automatically discretise the geometry directly from digital images using pixel information to accurately capture boundaries with fine-scale elements. The process allows complex numerical models to be generated from cross-section images of slopes, capitalising on the combination of the scaled boundary finite element method and quadtree meshing. The spatial distribution of the soil material properties can be represented by the colour of each pixel. A mapping technique is developed to integrate these parameters into the computational mesh. The feasibility of the proposed method is presented through case study simulations of an active large Australian open-pit mine, considering various aspects of complex features such as geometry, stratigraphy and material behaviour.

Item Type: Article
Authors/Creators:Wijesinghe, DR and Dyson, A and You, G and Khandelwal, M and Song, C and Ooi, ET
Keywords: scaled boundary finite element method, slope stability, spatial variation, image-based analysis, quadtree mesh
Journal or Publication Title: Computers and Geotechnics
Publisher: Elsevier Sci Ltd
ISSN: 0266-352X
DOI / ID Number: 10.1016/j.compgeo.2021.104586
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© 2021 Published by Elsevier Ltd.

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