1. Modelling of Fluidised Geomaterials: The Case of the Aberfan and the Gypsum Tailings Impoundment Flowslides
- Author
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Manuel Pastor, Ángel Yagüe, Saeid Moussavi Tayyebi, Miguel Martín Stickle, María Dolores Elizalde, Chuan Lin, Paola Dutto, and Diego Manzanal
- Subjects
Engineering ,Gypsum ,010504 meteorology & atmospheric sciences ,SPH ,landslide propagation modelling ,Perzyna viscoplasticity ,Aberfan flowslide ,Gypsum tailings impoundment flowslide ,fluidised behaviour ,Sph ,0211 other engineering and technologies ,Gypsum Tailings Impoudment Flowslide ,purl.org/becyt/ford/2.1 [https] ,INGENIERÍAS Y TECNOLOGÍAS ,02 engineering and technology ,engineering.material ,lcsh:Technology ,01 natural sciences ,Article ,Pore water pressure ,Fluidised Behaviour ,Rheology ,General Materials Science ,Geotechnical engineering ,lcsh:Microscopy ,lcsh:QC120-168.85 ,021101 geological & geomatics engineering ,0105 earth and related environmental sciences ,Perzyna Viscoplasticity ,Soil mass ,lcsh:QH201-278.5 ,Viscoplasticity ,lcsh:T ,business.industry ,Finite difference ,Landslide Propagation Modelling ,Aberfan Flowslide ,Tailings ,Ingeniería Civil ,purl.org/becyt/ford/2 [https] ,lcsh:TA1-2040 ,lcsh:Descriptive and experimental mechanics ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,lcsh:Engineering (General). Civil engineering (General) ,business ,lcsh:TK1-9971 - Abstract
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 v−pw 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). Fil: Dutto, Paola. Bundesanstalt für Materialforshung und-prüfung; Alemania Fil: Stickle, Miguel Martín. Universidad Politécnica de Madrid; España Fil: Pastor, Manuel. Universidad Politécnica de Madrid; España Fil: Manzanal, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Tecnologías y Ciencias de la Ingeniería "Hilario Fernández Long". Universidad de Buenos Aires. Facultad de Ingeniería. Instituto de Tecnologías y Ciencias de la Ingeniería "Hilario Fernández Long"; Argentina. Universidad Politécnica de Madrid; España. Universidad Nacional de la Patagonia; Argentina Fil: Yague, Ángel. Universidad Politécnica de Madrid; España Fil: Moussavi Tayyebi , Saeid. Universidad Politécnica de Madrid; España Fil: Lin, Chuan. Hohai University. College of Water Conservancy and Hydropower; China Fil: Elizalde, María Dolores. Consejo Superior de Investigaciones Cientificas; España
- Published
- 2017
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