Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides
Bundesanstalt für Materialforschung und-prüfung, Berlin 12167, Germany
Department of Applied Mathematics, ETSI Caminos, Universidad Politécnica de Madrid, Profesor Aranguren s/n, 28040 Madrid, Spain
INTECIN-CONICET-UBA-UNPSJB, Buenos Aires 1426, Argentina
College of Water Conservancy and Hydropower, Hohai University, Nanjing 210098, China
Consejo Superior de Investigaciones Científicas, Albasanz, 26-28, 28037 Madrid, Spain
Author to whom correspondence should be addressed.
Academic Editor: Miguel Cervera
Received: 22 February 2017 / Revised: 15 May 2017 / Accepted: 16 May 2017 / Published: 20 May 2017
The choice of a pure cohesive or a pure frictional viscoplastic model to represent the rheological behaviour of a flowslide is of paramount importance in order to obtain accurate results for real cases. The principal goal of the present work is to clarify the influence of the type of viscous model—pure cohesive versus pure frictional—with the numerical reproduction of two different real flowslides that occurred in 1966: the Aberfan flowslide and the Gypsum tailings impoundment flowslide. In the present work, a depth-integrated model based on the
Biot–Zienkiewicz formulation, enhanced with a diffusion-like equation to account for the pore pressure evolution within the soil mass, is applied to both 1966 cases. For the Aberfan flowslide, a frictional viscous model based on Perzyna viscoplasticity is considered, while a pure cohesive viscous model (Bingham model) is considered for the case of the Gypsum flowslide. The numerical approach followed is the SPH method, which has been enriched by adding a 1D finite difference grid to each SPH node in order to improve the description of the pore water evolution in the propagating mixture. The results obtained by the performed simulations are in agreement with the documentation obtained through the UK National Archive (Aberfan flowslide) and the International Commission of large Dams (Gypsum flowslide).
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Dutto, P.; Stickle, M.M.; Pastor, M.; Manzanal, D.; Yague, A.; Moussavi Tayyebi, S.; Lin, C.; Elizalde, M.D. Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides. Materials 2017, 10, 562.
Dutto P, Stickle MM, Pastor M, Manzanal D, Yague A, Moussavi Tayyebi S, Lin C, Elizalde MD. Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides. Materials. 2017; 10(5):562.
Dutto, Paola; Stickle, Miguel M.; Pastor, Manuel; Manzanal, Diego; Yague, Angel; Moussavi Tayyebi, Saeid; Lin, Chuan; Elizalde, Maria D. 2017. "Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides." Materials 10, no. 5: 562.
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