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.
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References
Tsaparas I, Rahardjo H, Toll DG, Leong EC (2002) Controlling parameters for rainfall-induced landslides. Comput Geotech 29(1):1–27
Cho SE, Lee SR (2001) Instability of unsaturated soil slopes due to infiltration. Comput Geotech 28(3):185–208
LLoret A, Alonso EE, (1980) Consolidation of unsaturated soils including swelling and collapse behaviour. Géotechnique 30(4):44s9-477
Alonso EE, Gens A, Delahaye CH (2003) Influence of rainfall on the deformation and stability of a slope in overconsolidated clays: a case study. Hydrogeol J 11(1):174–192
Oka F, Kimoto S, Takada N, Gotoh H, Higo Y (2010) A seepage-deformation coupled analysis of an unsaturated river embankment using a multiphase elasto-viscoplastic theory. Soils Found 50(4):483–494
Borja RI, White JA (2010) Continuum deformation and stability analyses of a steep hillside slope under rainfall infiltration. Acta Geotech 5(1):1–14
Zheng Y, Hatami K, Miller GA (2017) Numerical simulation of wetting-induced settlement of embankments. J Perform Constructed Facil 31(3):D4017001
Khalili N, Habte MA, Zargarbashi S (2008) A fully coupled flow deformation model for cyclic analysis of unsaturated soils including hydraulic and mechanical hystereses. Comput Geotech 35(6):872–889
Russell AR, Khalili N (2006) A unified bounding surface plasticity model for unsaturated soils. Int J Numer Anal Methods Geomech 30(3):181–212
Khalili N, Khabbaz MH (1998) A unique relationship of chi for the determination of the shear strength of unsaturated soils. Geotechnique 48(5)
Van Genuchten MT (1980) A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci Soc Am J 44(5):892–898
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Moghaddasi, H., Osman, A., Toll, D., Khalili, N. (2022). Rainfall-Induced Deformation on Unsaturated Collapsible Soils. In: Tutumluer, E., Nazarian, S., Al-Qadi, I., Qamhia, I.I. (eds) Advances in Transportation Geotechnics IV. Lecture Notes in Civil Engineering, vol 166. Springer, Cham. https://doi.org/10.1007/978-3-030-77238-3_34
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DOI: https://doi.org/10.1007/978-3-030-77238-3_34
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