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- W1970769102 abstract "Problem statement: Internal erosion occurs in soils containing fine particles under theaction of high pressure gradients that could result from water discharge. This phenomenon can yield inits final stage to the formation of piping which constitutes a real threat for hydraulics infrastructures asit can precipitate their entire rupture in very short time. In order to mitigate this insidious hazard, it isimportant to characterize piping dynamics. In this context, the Hole Erosion Test was introduced toassess the erosive features of soils by means of two parameters, the erosion rate and the critical shearstress indicating the beginning of erosion. Modeling this test can enable to understand morecomprehensibly the piping phenomenology. Approach: A simplified analytical modeling of the HoleErosion Test was considered in this study. A closed form solution of erosion taking place during pipingwas derived without resorting to the habitual cumbersome developments that are needed to achievecomplete solution of the rational equations describing this highly coupled problem. This was achievedby assuming formal analogy between the erosive shear stress and the friction shear that develops at acylindrical piping wall under an axial viscous flow. The flow was assumed to be uniform along thetube. Results: A closed form analytical formula describing erosion dynamics associated to piping wasderived. Theoretical predictions were compared with experimental results and the simplified modelwas found to predict accurately the increase of flow rate that results from piping erosion.Conclusion/Recommendations: The one-dimensional modeling that was proposed for the HoleErosion Test under strong simplifying assumptions was found to yield the same features as thoseobtained in the literature by using other approaches. It gives furthermore the dynamics as function ofthe fluid regime existing inside the tube. In order to get further insight regarding the flowing flowaction, which could be non uniform during erosion, more advanced modeling is needed." @default.
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- W1970769102 date "2010-04-01" @default.
- W1970769102 modified "2023-09-26" @default.
- W1970769102 title "A Simplified Analytical Modeling of the Hole Erosion Test" @default.
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- W1970769102 doi "https://doi.org/10.3844/ajeassp.2010.765.768" @default.
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