TY - GEN
T1 - Coupled problem of saturated-unsaturated seepage flow and internal erosion of soils
AU - Fujisawa, K.
AU - Niina, D.
AU - Murakami, A.
AU - Nishimura, S.
PY - 2010
Y1 - 2010
N2 - About 50% of dam failures in the world have been triggered by piping, which is a primary cause of embankment breaks. The phenomenon of piping results from the erosion of soil particles and their transport within the soil mass. In this paper, a numerical method to analyze erosion within soils and transport of eroded soil particles is proposed. For the analysis, the saturated-unsaturated seepage flow of the pore liquid, the detachment of soil particles from the soil fabric and the migration of the eroded particles are needed to be considered. As the results of this numerical simulation, the temporal alteration and the spatial distribution of the porosity, the particle size distribution and the concentration of the detached soil particle in the pore liquid, as well as the pore liquid pressure, can be obtained. The results of this analysis have revealed that the method qualitatively predicts the development of piping inside soil structures, such as embankments, as the solutions of the initial and boundary value problem.
AB - About 50% of dam failures in the world have been triggered by piping, which is a primary cause of embankment breaks. The phenomenon of piping results from the erosion of soil particles and their transport within the soil mass. In this paper, a numerical method to analyze erosion within soils and transport of eroded soil particles is proposed. For the analysis, the saturated-unsaturated seepage flow of the pore liquid, the detachment of soil particles from the soil fabric and the migration of the eroded particles are needed to be considered. As the results of this numerical simulation, the temporal alteration and the spatial distribution of the porosity, the particle size distribution and the concentration of the detached soil particle in the pore liquid, as well as the pore liquid pressure, can be obtained. The results of this analysis have revealed that the method qualitatively predicts the development of piping inside soil structures, such as embankments, as the solutions of the initial and boundary value problem.
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M3 - Conference contribution
AN - SCOPUS:84875141613
SN - 9780415804806
T3 - Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils
SP - 837
EP - 842
BT - Unsaturated Soils
T2 - 4th Asia Pacific Conference on Unsaturated Soils
Y2 - 23 November 2009 through 25 November 2009
ER -