@inproceedings{db4e8f8da4e045888057083ca6c5ba75,
title = "Rainfall-induced deformation on unsaturated collapsible soils",
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.",
keywords = "constitutive model, rainfall, unsaturated soils",
author = "Hamed Moghaddasi and Ashraf Osman and David Toll and Nasser Khalili",
year = "2021",
month = sep,
day = "17",
doi = "10.1007/978-3-030-77238-3_34",
language = "English",
isbn = "9783030772376",
series = "Lecture Notes in Civil Engineering",
publisher = "Springer",
pages = "447--456",
editor = "Erol Tutumluer and Soheil Nazarian and Imad Al-Qadi and Qamhia, {Issam I.A.}",
booktitle = "Advances in Transportation Geotechnics IV",
note = "4th International Conference on Transportation Geotechnics, ICTG 2021 ; Conference date: 23-05-2021 Through 26-05-2021",
}