Three-dimensional numerical modeling of the temporal evolution of backward erosion piping

Backward erosion piping (BEP) is a complex degradation mechanism in geotechnical flood protection infrastructure (GFPI) that is still relatively less understood, particularly when considering its time-dependent features. This manuscript presents a novel dual random lattice modeling approach for thre...

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Veröffentlicht in:Computers and geotechnics Jg. 171; S. 106381
Hauptverfasser: Wang, Zhijie, Oskay, Caglar, Fascetti, Alessandro
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier Ltd 01.07.2024
Schlagworte:
Backward erosion piping
Computational algorithm
Constitutive law
Numerical modeling
Time evolution
Numerical modeling
Time evolution
Constitutive law
Backward erosion piping
Computational algorithm
ISSN:0266-352X
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Zusammenfassung:Backward erosion piping (BEP) is a complex degradation mechanism in geotechnical flood protection infrastructure (GFPI) that is still relatively less understood, particularly when considering its time-dependent features. This manuscript presents a novel dual random lattice modeling approach for three-dimensional simulation of BEP, with a focus on its evolution over time. The key novelty of this presented framework is twofold: (1) we propose and incorporate a novel constitutive relationship for computation of time-dependent soil erosion based on the theory of rate processes, and (2) we devise an algorithm for calculation of coupled degradation of the dual lattices for accurate computation of 3-D hydraulic gradients. The constitutive relationship was developed from fundamental granular physics, and brings the potential to provide deeper fundamental physical understanding of the phenomenon. The capabilities of the modeling framework are investigated by comparison with available laboratory experiments which illustrates good agreement in the spatial advancement of piping erosion, pipe progression speeds, as well as the evolution of local gradients. To the best knowledge of the authors, the presented model is the first to be able to capture all of the aforementioned features when simulating BEP.
ISSN:0266-352X
DOI:10.1016/j.compgeo.2024.106381