Hamed Moghaddasi
Rainfall induced deformation on unsaturated collapsible soils
Moghaddasi, Hamed; Osman, Ashraf; Toll, David; Khalili, Nasser
Authors
Contributors
E Tutumluer
Editor
S NazarianImad
Editor
A Qamhia
Editor
Abstract
The stability of transportation infrastructure can be affected by seasonal rainfall infiltrated adjacent excavations and natural slopes. The paper investigates the rainfall-induced deformation of an anchored excavation constructed in unsaturated soils. An advanced constitutive model based on the theory of bounding surface plasticity is employed to predict the behaviour of partially saturated soils. The collapse characteristics of unsaturated soils due to wetting are captured in the model by introducing a suction-dependent hardening law. The proposed model has been implemented in a finite difference code with a two-phase flow and deformation formulation. In the numerical algorithms, the validity of the effective stress principle in unsaturated soils is emphasized and the coupling between various phases of porous media has been considered. The problem of an anchored excavation subjected to rainfall is then simulated with the implemented model. The lateral deformation of the supported excavation during the infiltration of water into unsaturated collapsible soils is obtained and compared with the case where the plastic collapse is prevented. Finally, the effect of anchors on minimizing and changing the mode of the deformation is explored.
Citation
Moghaddasi, H., Osman, A., Toll, D., & Khalili, N. (2022). Rainfall induced deformation on unsaturated collapsible soils. In E. Tutumluer, S. NazarianImad, & A. Qamhia (Eds.), Advances in Transportation Geotechnics IV (447-456). https://doi.org/10.1007/978-3-030-77238-3_34
Conference Name | Proceedings of the 4th International Conference on Transportation Geotechnics |
---|---|
Conference Location | Chicago, Illinois, on 23-26 May 2021 |
Online Publication Date | Sep 17, 2021 |
Publication Date | 2022 |
Deposit Date | Jan 15, 2022 |
Publicly Available Date | Sep 17, 2022 |
Publisher | Springer Verlag |
Volume | 166 |
Pages | 447-456 |
Series Title | Lecture Notes in Civil Engineering |
Book Title | Advances in Transportation Geotechnics IV |
ISBN | 9783030772376 |
DOI | https://doi.org/10.1007/978-3-030-77238-3_34 |
Public URL | https://durham-repository.worktribe.com/output/1137834 |
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Copyright Statement
This a post-peer-review, pre-copyedit version of a chapter published in Advances in Transportation Geotechnics IV. The final authenticated version is available online at: https://doi.org/10.1007/978-3-030-77238-3_34
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