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Title:
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Thermal effects in landslide mobility
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Author:
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Pinyol Puigmartí, Núria Mercè; Alvarado Bueno, Mauricio; Alonso Pérez de Agreda, Eduardo; Zabala, Francisco
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental; Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques |
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Abstract:
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The paper describes a thermo-hydro-mechanical formulation to model thermal-induced effects due to the irreversible work input generated during the soil deformation. The model was implemented into a Material Point calculation procedure. The method is applied to the analysis of landslides. A simple slope stability is first analysed. Mechanical work essentially dissipates in shearing bands which develop excess pore water pressures. The marked effect of soil permeability to control the slide motion after failure is described. Shear band thickness is also a relevant control variable. The problem posed by the non-realistic thickness of shear bands in numerical calculation is addressed by means of a numerical procedure that includes the consideration of embedded shear bands where the strains are assumed to be localized. Balance equations describing local flow and thermal interactions between shear bands and the remaining material are formulated. The method is applied to model the instability and subsequent rapid motion of Vajont landslide. Calculated run-out and sliding velocity reproduce, in a satisfactory manner, field observations. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls
-Landslides
-Rapid landslides
-thermal induced pore water pressure
-Vajont landslide
-u-p-T formulation approach
-material point method (MPM)
-Esllavissades |
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Rights:
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Document type:
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Article - Submitted version
Article |
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Published by:
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Thomas Telford
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