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A Micro-Scale Model for the Analysis of Flood-Induced Piping in River Levees
A fully coupled hydromechanical model is introduced to analyze the macro-scale pore fluid flow and micro-scale solid phase deformation of saturated granular soils. The fluid motion is idealized using averaged Navier-Stokes equations, and the distinct element method is employed to model the assemblage of solid particles. The fluid-particle interactions are quantified using established relationships. Computational simulation is conducted to investigate the response of sandy deposits when subjected to a continuously increasing head difference causing water flow underneath a river levee. The conducted simulation provided information at the micro-scale level for the solid phase as well as at the macroscopic level for the pore-water flow. The proposed model is capable of evaluating the critical gradient causing piping under transient flow conditions as the hydraulic head difference gradually increases and the solid phase undergoes subsequent deformations. The conducted simulations captured the formation of sand boils and the corresponding exit gradients. The proposed model provides an effective tool to analyze saturated soil systems undergoing large deformation under extreme flow conditions such as those encountered during piping.
A Micro-Scale Model for the Analysis of Flood-Induced Piping in River Levees
A fully coupled hydromechanical model is introduced to analyze the macro-scale pore fluid flow and micro-scale solid phase deformation of saturated granular soils. The fluid motion is idealized using averaged Navier-Stokes equations, and the distinct element method is employed to model the assemblage of solid particles. The fluid-particle interactions are quantified using established relationships. Computational simulation is conducted to investigate the response of sandy deposits when subjected to a continuously increasing head difference causing water flow underneath a river levee. The conducted simulation provided information at the micro-scale level for the solid phase as well as at the macroscopic level for the pore-water flow. The proposed model is capable of evaluating the critical gradient causing piping under transient flow conditions as the hydraulic head difference gradually increases and the solid phase undergoes subsequent deformations. The conducted simulations captured the formation of sand boils and the corresponding exit gradients. The proposed model provides an effective tool to analyze saturated soil systems undergoing large deformation under extreme flow conditions such as those encountered during piping.
A Micro-Scale Model for the Analysis of Flood-Induced Piping in River Levees
El Shamy, U. (author) / Aydin, F. (author)
Geo-Denver 2007 ; 2007 ; Denver, Colorado, United States
2007-10-14
Conference paper
Electronic Resource
English
Dams , Louisiana , Levees and dikes , Slopes , Embankments , Floods , Rivers and streams , Granular media , Fluid flow , Model studies
A Micro-Scale Model for the Analysis of Flood-Induced Piping in River Levees
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