Experimental Parametric Study of Suffusion and Backward Erosion
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 134, Issue 1
Abstract
Within hydraulic earth structures (dikes, levees, or dams), internal seepage flows can generate the entrainment of the soil grains. Grain transportation affects both particle size distributions and porosity, and changes the mechanical and hydraulic characteristics of the earth’s structure. The occurrence of failures in new earth structures due to internal erosion demonstrates the urgency of improving our knowledge of these phenomena of erosion. With this intention, a new experimental device has been developed that can apply hydraulic stresses to reconstituted consolidated cohesive soils without cracks in order to characterize the erosion evolution processes that might be present. A parametric study was conducted to examine the influence of three critical parameters on clay and sand erosion mechanisms. When the hydraulic gradient was low, it was concluded that the erosion of the structure’s clay fraction was due to suffusion. When the hydraulic gradient increased, it was concluded that the sand fraction erosion initiation was due to backward erosion. The extent of the erosion was dependent on the clay content. The study underlines the complexity of confinement stress effects on both erosion phenomena.
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Acknowledgments
Special thanks to Mr. Coué for his involvement in the production of the experimental device.
References
AFNOR. (1994). “Essais à l’appareil triaxial de révolution.” Rep. No. NF P 94-074, Association Française de Normalisation.
Arulanandan, K., and Perry, E. B. (1983). “Erosion in relation to filter design criteria in earth dams.” J. Geotech. Engrg., 109(5), 682–698.
Ayadat, T., Belouahri, B., and Ait Ammar, R. (1998). “La migration des particules fines comme approche d’explication du mécanisme de l’effondrement.” Revue Française de Géotechnique, 83, 73–81.
Barakat, B. (1991). “Instabilité aux écoulements des milieux granulaires, aspects morphologiques et probabilistes.” Ph.D. thesis, Ecole Centrale de Paris, France.
Bendahmane, F. (2005). “Influence des interactions mécaniques eau-sol sur l’érosion interne.” Ph.D. thesis, Université de Nantes, France.
Camapum De Carvalho, J., Crispel, J., Mieussens, C., and Nardone, A. (1987). “La reconstitution des éprouvettes en laboratoire; théorie et pratique opératoire.” Rapport de Recherche LCPC No. 145.
Daniel, D. E., Trautwein, S. J., Boynton, S. S., and Foreman, D. E. (1984). “Permeability testing with flexible-wall permeameters.” Geotech. Test. J., 7(3), 113–122.
Foster, M., Fell, R., and Spannagle, M. (2000). “The statistics of embankment dam failures and accidents.” Can. Geotech. J., 37, 1000–1024.
Kenney, T. C., and Lau, D. (1985). “Internal stability of granular filters.” Can. Geotech. J., 22, 215–225.
Khilar, K. C., Fogler, H. S., and Gray, D. H. (1985). “Model for piping-plugging in earthen structures.” J. Geotech. Engrg., 111(7), 833–846.
Lafleur, J., Mlynarek, J., and Rollin, A. L. (1989). “Filtration of broadly graded cohesionless soils.” J. Geotech. Engrg., 115(12), 1747–1768.
Monnet, A. (1998). “Boulance, érosion interne, renard. Les instabilités sous écoulement.” Revue Française de Géotechnique, 82, 3–10.
Papamichos, E., Vardoulakis, I., Tronvoll, J., and Skjærstein, A. (2001). “Volumetric sand production model and experiment.” Int. J. Numer. Analyt. Meth. Geomech., 25, 789–808.
Reddi, L. N., Lee, I., and Bonala, M. V. S. (2000). “Comparison of internal and surface erosion using flow pump test on a sand-kaolinite mixture.” Geotech. Test. J., 23(1), 116–122.
Skempton, A. W., and Brogan, J. M. (1994). “Experiments on piping in sandy gravels.” Geotechnique, 44(3), 440–460.
Tomlinson, S. S., and Vaid, Y. P. (2000). “Seepage forces and confining pressure effects on piping erosion.” Can. Geotech. J., 37, 1–13.
Wan, C. F., and Fell, R. (2004). “Investigation of erosion of soils in embankment dams.” J. Geotech. Geoenviron. Eng., 130(4), 373–380.
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© 2008 ASCE.
History
Received: Jun 2, 2006
Accepted: May 22, 2007
Published online: Jan 1, 2008
Published in print: Jan 2008
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