In this paper, a computational framework based on the Material Point Method is developed to study the coupled seepage-deformation process in unsaturated soils. Governing equations are derived from the balance equations of solid and liquid phases accounting for partial saturation effects, and the soil is discretized with a single set of material points which move according to the displacement of the solid phase. The implementation of different types of boundary conditions, such as transient hydraulic head, seepage face, and infiltration/evaporation, is discussed in detail. The method is applied to simulate levee collapse due to rapid drawdown and rainfall. The methodology proposed in this paper is a promising tool to advance the current practice, which customarily evaluates slope safety only by means of small deformation analyses based on FEM or LEM, while here a large deformation approach is presented.

Two-phase dynamic MPM formulation for unsaturated soil

Francesca Ceccato
Writing – Original Draft Preparation
;
Veronica Girardi
Writing – Original Draft Preparation
;
Paolo SImonini
Project Administration
;
2021

Abstract

In this paper, a computational framework based on the Material Point Method is developed to study the coupled seepage-deformation process in unsaturated soils. Governing equations are derived from the balance equations of solid and liquid phases accounting for partial saturation effects, and the soil is discretized with a single set of material points which move according to the displacement of the solid phase. The implementation of different types of boundary conditions, such as transient hydraulic head, seepage face, and infiltration/evaporation, is discussed in detail. The method is applied to simulate levee collapse due to rapid drawdown and rainfall. The methodology proposed in this paper is a promising tool to advance the current practice, which customarily evaluates slope safety only by means of small deformation analyses based on FEM or LEM, while here a large deformation approach is presented.
File in questo prodotto:
File Dimensione Formato  
Pre-print.pdf

accesso aperto

Tipologia: Preprint (submitted version)
Licenza: Accesso libero
Dimensione 7.48 MB
Formato Adobe PDF
7.48 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3358689
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 35
  • ???jsp.display-item.citation.isi??? 25
social impact