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International Journal for Multiscale Computational Engineering

Publicado 6 números por año

ISSN Imprimir: 1543-1649

ISSN En Línea: 1940-4352

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A HYDROMECHANICAL FINITE ELEMENT FORMULATION FOR LOCALIZED INTERNAL EROSION IN POROUS MEDIA, WITH APPLICATION TO BACKWARD PIPING IN COFFERDAMS

Volumen 18, Edición 2, 2020, pp. 181-197
DOI: 10.1615/IntJMultCompEng.2020031422
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Carlo Callari
DiBT Engineering Division, University of Molise, Campobasso, Italy, 86100
http://docenti.unimol.it/cv/carlocallari_en.pdf
Francesco Froiio
Univ Lyon, École Centrale de Lyon, LTDS, 69134 Écully, France

SINOPSIS

We have recently proposed a finite element formulation able to simulate the localization of propagating internal erosion in rigid porous media. In the present paper, such method is extended to deformable porous solids, in order to also model the interaction between backward erosion piping and soil movements. We present the equations governing the exchange and transport of solid and fluid mass in a saturated poro-elastoplastic solid embedding a propagating erosion conduit conveying a multiphase flow. The full set of coupled finite element equations is then obtained from the weak formulations of mechanical equilibrium and fluid mass balance. The performance of the proposed formulation is assessed through an analysis of the soil response to the progressive dewatering of a cofferdam. The hydromechanical coupling and the ability in capturing both the onset and propagation of piping are crucial for an interpretation of the limit states typically observed in these structures.

PALABRAS CLAVE: seepage, poro-elastoplasticity, localized flows, localized erosion, internal erosion, backward erosion piping, cofferdams, sheet-pile walls, soil heaving, finite elements
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CITADO POR

  1. Froiio Francesco, Callari Carlo, Rotunno Andrea Francesco, A numerical experiment of backward erosion piping: kinematics and micromechanics, Meccanica, 54, 14, 2019. Crossref

  2. Robbins B.A., Griffiths D.V., A two-dimensional, adaptive finite element approach for simulation of backward erosion piping, Computers and Geotechnics, 129, 2021. Crossref

  3. Rahimi Mehrzad, Shafieezadeh Abdollah, Wood Dylan, Kubatko Ethan J., A physics-based approach for predicting time-dependent progression length of backward erosion piping, Canadian Geotechnical Journal, 58, 7, 2021. Crossref

  4. Callari Carlo, Pol Johannes C., Numerical interpretation of regressive localized internal erosion in a real-scale levee physical model, Geomechanics for Energy and the Environment, 2022. Crossref

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