Characteristics of Failure Mass and Safety Factor during Rainfall of an Unsaturated Slope
International audience Water is an important factor triggering destabilization of soil masses in slopes, particular in unsaturated condition. Rainfall and snow melting are some of the main sources of natural water which frequently induce unsaturated slope failure in arid/semi-arid region or in activ...
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ftccsdartic:oai:HAL:hal-02153970v1 2023-05-15T17:58:03+02:00 Characteristics of Failure Mass and Safety Factor during Rainfall of an Unsaturated Slope Le, Thi Minh Hue Gallipoli, Domenico Sanchez, Marcelo Wheeler, Simon Laboratoire des Sciences de l'Ingénieur Appliquées à la Mécanique et au génie Electrique (SIAME) Université de Pau et des Pays de l'Adour (UPPA) Delage P. and Cui Y.-J. and Ghabezloo S. and Pereira J.-M. and Tang A.-M. Paris, France, France 2016-09-12 https://hal-univ-pau.archives-ouvertes.fr/hal-02153970 https://doi.org/10.1051/e3sconf/20160915011 en eng HAL CCSD EDP Sciences info:eu-repo/semantics/altIdentifier/doi/10.1051/e3sconf/20160915011 hal-02153970 https://hal-univ-pau.archives-ouvertes.fr/hal-02153970 doi:10.1051/e3sconf/20160915011 3rd European Conference on Unsaturated Soils 3rd European Conference on Unsaturated Soils \textendash ``E-UNSAT 2016'' - Proceedings Volume https://hal-univ-pau.archives-ouvertes.fr/hal-02153970 3rd European Conference on Unsaturated Soils \textendash ``E-UNSAT 2016'' - Proceedings Volume, Sep 2016, Paris, France, France. pp.15011, ⟨10.1051/e3sconf/20160915011⟩ Slopes Stability [PHYS]Physics [physics] info:eu-repo/semantics/conferenceObject Conference papers 2016 ftccsdartic https://doi.org/10.1051/e3sconf/20160915011 2021-02-07T00:40:21Z International audience Water is an important factor triggering destabilization of soil masses in slopes, particular in unsaturated condition. Rainfall and snow melting are some of the main sources of natural water which frequently induce unsaturated slope failure in arid/semi-arid region or in active layers (i.e. frequently frozen/thawed layers) in permafrost. If the slopes are in coastal environment or adjacent to a stream, the soil materials from the sliding masses might be carried away by waves and currents, which can further lead to soil erosion problem. Therefore, characterization of the failure mass and safety factor is critical both for evaluation of slope failure hazard but also for erosion problem. This paper presents a method to study unsaturated slope stability including characterizing the size of failure and the safety factor by analyzing a theoretical unsaturated homogeneous slope subjected to rainfall infiltration. The slope is modelled numerically by the finite element method. A shear strength reduction technique is modified for unsaturated soils and employed to evaluate the factor of safety and the extent of the sliding mass. The results show that the size of failure and the factor of safety vary over the rainfall event. Notably, the extent of the sliding mass for unsaturated slopes depends strongly on the infiltration depth. Large global sliding surface tends to be the dominant mechanism if the infiltration depth is very shallow or very deep. Conversely, local restricted sliding surface becomes more dominant if the infiltration is approximately at a certain critical value. Conference Object permafrost Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) E3S Web of Conferences 9 15011 |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Slopes Stability [PHYS]Physics [physics] |
spellingShingle |
Slopes Stability [PHYS]Physics [physics] Le, Thi Minh Hue Gallipoli, Domenico Sanchez, Marcelo Wheeler, Simon Characteristics of Failure Mass and Safety Factor during Rainfall of an Unsaturated Slope |
topic_facet |
Slopes Stability [PHYS]Physics [physics] |
description |
International audience Water is an important factor triggering destabilization of soil masses in slopes, particular in unsaturated condition. Rainfall and snow melting are some of the main sources of natural water which frequently induce unsaturated slope failure in arid/semi-arid region or in active layers (i.e. frequently frozen/thawed layers) in permafrost. If the slopes are in coastal environment or adjacent to a stream, the soil materials from the sliding masses might be carried away by waves and currents, which can further lead to soil erosion problem. Therefore, characterization of the failure mass and safety factor is critical both for evaluation of slope failure hazard but also for erosion problem. This paper presents a method to study unsaturated slope stability including characterizing the size of failure and the safety factor by analyzing a theoretical unsaturated homogeneous slope subjected to rainfall infiltration. The slope is modelled numerically by the finite element method. A shear strength reduction technique is modified for unsaturated soils and employed to evaluate the factor of safety and the extent of the sliding mass. The results show that the size of failure and the factor of safety vary over the rainfall event. Notably, the extent of the sliding mass for unsaturated slopes depends strongly on the infiltration depth. Large global sliding surface tends to be the dominant mechanism if the infiltration depth is very shallow or very deep. Conversely, local restricted sliding surface becomes more dominant if the infiltration is approximately at a certain critical value. |
author2 |
Laboratoire des Sciences de l'Ingénieur Appliquées à la Mécanique et au génie Electrique (SIAME) Université de Pau et des Pays de l'Adour (UPPA) Delage P. and Cui Y.-J. and Ghabezloo S. and Pereira J.-M. and Tang A.-M. |
format |
Conference Object |
author |
Le, Thi Minh Hue Gallipoli, Domenico Sanchez, Marcelo Wheeler, Simon |
author_facet |
Le, Thi Minh Hue Gallipoli, Domenico Sanchez, Marcelo Wheeler, Simon |
author_sort |
Le, Thi Minh Hue |
title |
Characteristics of Failure Mass and Safety Factor during Rainfall of an Unsaturated Slope |
title_short |
Characteristics of Failure Mass and Safety Factor during Rainfall of an Unsaturated Slope |
title_full |
Characteristics of Failure Mass and Safety Factor during Rainfall of an Unsaturated Slope |
title_fullStr |
Characteristics of Failure Mass and Safety Factor during Rainfall of an Unsaturated Slope |
title_full_unstemmed |
Characteristics of Failure Mass and Safety Factor during Rainfall of an Unsaturated Slope |
title_sort |
characteristics of failure mass and safety factor during rainfall of an unsaturated slope |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal-univ-pau.archives-ouvertes.fr/hal-02153970 https://doi.org/10.1051/e3sconf/20160915011 |
op_coverage |
Paris, France, France |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
3rd European Conference on Unsaturated Soils 3rd European Conference on Unsaturated Soils \textendash ``E-UNSAT 2016'' - Proceedings Volume https://hal-univ-pau.archives-ouvertes.fr/hal-02153970 3rd European Conference on Unsaturated Soils \textendash ``E-UNSAT 2016'' - Proceedings Volume, Sep 2016, Paris, France, France. pp.15011, ⟨10.1051/e3sconf/20160915011⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1051/e3sconf/20160915011 hal-02153970 https://hal-univ-pau.archives-ouvertes.fr/hal-02153970 doi:10.1051/e3sconf/20160915011 |
op_doi |
https://doi.org/10.1051/e3sconf/20160915011 |
container_title |
E3S Web of Conferences |
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9 |
container_start_page |
15011 |
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