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Bulletin of Engineering Geology and the Environment

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01.08.2024 | Original Paper

Numerical analysis of the effect of filter gabion against slope stability due to torrential rainfall

verfasst von: May Than Thar Cho, Hirotaka Saito, Toshihiro Hattori, Yuji Kohgo

Erschienen in: Bulletin of Engineering Geology and the Environment | Ausgabe 8/2024

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Abstract

Torrential rainfall is one of the significant factors contributing to shallow slope failures. This study discusses the effect of the different filter gabion sizes against slope instability due to torrential rainfall numerically. The experimental investigation of effects of different filter gabion sizes was extensively investigated. The investigations were carried out in a two-dimensional domain using the saturated–unsaturated consolidation analysis method with an elastoplastic model for unsaturated soils considering two suction effects. Four different sizes of filter gabion were used in this investigation. The results of numerical simulations of slope model tests showed that, as rainwater accumulated at the slope toe, the pore water pressures (PWPs) near the slope toe increased to be positive or larger than the surface soil’s air entry PWP. The phreatic surface that appeared on the slope surface as the positive PWPs increased with the elapsed time. In the simulations, large displacement, considered surface failure, started once the phreatic surface reached the slope surface. The simulated phreatic surface appearance time on the slope surface extended as the filter gabion size became larger. Nevertheless, the results showed that the applied analysis method is powerful and reliable for simulating slope failure behaviours and their proper countermeasures under torrential rainfall.

Vorheriger Artikel Physical, mechanical, and microstructural characteristics of fly ash replaced cement deep mixing columns

Nächster Artikel Shear wave implications in wetting-induced collapse of sand–clay mixtures

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Titel: Numerical analysis of the effect of filter gabion against slope stability due to torrential rainfall
verfasst von: May Than Thar Cho
Hirotaka Saito
Toshihiro Hattori
Yuji Kohgo
Publikationsdatum: 01.08.2024
Verlag: Springer Berlin Heidelberg
Erschienen in: Bulletin of Engineering Geology and the Environment / Ausgabe 8/2024
Print ISSN: 1435-9529
Elektronische ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-024-03813-8

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