Title:
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Hydraulic conductivity from piezocone on-the-fly: a numerical evaluation
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Author:
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Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Carbonell Puigbó, Josep Maria
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental; Universitat Politècnica de Catalunya. Departament de Resistència de Materials i Estructures a l'Enginyeria; Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques; Universitat Politècnica de Catalunya. RMEE - Grup de Resistència de Materials i Estructures en l'Enginyeria |
Abstract:
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Permeability is important in many geotechnical applications. The current CPTu practice to obtain permeability values relies on dissipation tests, which are frequently slow and only linked to permeability through compressibility measures. On-the-fly methods offer an alternative approach in which permeability is directly linked to CPTu penetration measurements. Several on-the-fly methods have been proposed and their applicability and relative advantages are not fully clear. Numerical effective stress simulation of CPTu testing is used here to explore in a simplified but realistic setting the relative merits of different on-the-fly methods. It is found that for partly drained materials the original simpler relation between cone metrics and normalized permeability works reasonably well. A continuous generalization of Elsworth and Lee method to the full permeability range is proposed, noting the connection to the backbone normalized pore pressure curve that describes the partly drained transition of cone penetration. The importance of an undrained limit beyond which the method produces large errors is stressed. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls -Soil permeability--Mathematical models -Permeability -in-situ testing -CPTu -numerical analysis -PFEM -Sòls -- Propietats -- Elements finits -Permeabilitat |
Rights:
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Document type:
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Article - Submitted version Article |
Published by:
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Institution of Civil Engineers (ICE)
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