Practical Application of Blanket Theory and the Finite-Element Method to Levee Underseepage Analysis
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 141, Issue 4
Abstract
The U.S. Army Corps of Engineers’ blanket theory has been successfully used to evaluate levee underseepage for many years. The method was developed from closed-form analytical solutions based on the principles of groundwater hydrology. More recently, the proliferation of computing resources has made finite-element analysis (FEA) a tool that is easily accessible to many geotechnical engineers. This study compares the results of blanket theory to FEA to delineate conditions in which the two methods provide essentially the same solution. The assumptions inherent to blanket theory are reviewed to provide designers with an understanding of its usefulness and limitations. Guidelines are provided for correctly assigning FEA boundary conditions that are consistent with the assumptions of blanket theory. For cases in which all of the assumptions are satisfied, the volumetric flow rate and excess head at the levee toe predicted by blanket theory were within 10% of those determined by using FEA.
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Acknowledgments
The authors acknowledge the support provided by the USACE for conducting this research. Mr. Noah Vroman of Vicksburg District of the Corps of Engineers and Ms. Martha Jimenez, a graduate student at Virginia Tech, also provided valuable assistance during this research.
References
Barron, R. A. (1948). “The effect of a slightly pervious top blanket on the performance of relief wells.” Proc., 2nd Int. Conf. Soil Mechanics and Foundation Engineering, Vol. 4, ISSMGE, 342.
Bear, J. (1979). Hydraulics of groundwater, McGraw-Hill, New York.
Bennett, P. T. (1946). “The effect of blankets on the seepage through pervious foundation.” Trans. ASCE, 111(1), 215–228.
Brandon, T. L., Batool, A., Jimenez, M., and Vroman, N. (2014). “Levee seepage analysis using blanket theory and finite element analysis.” USACE Engineering Research and Development Center, Vicksburg, MS, 129.
Duncan, J. M., O’Neil, B., Brandon, T. L., and VandenBerge, D. R. (2011). “Evaluation of potential for erosion in levees and levee foundations.”, Center for Geotechnical Practice and Research, Virginia Tech, Blacksburg, VA, 36.
Forchheimer, P. (1917). “On the movement of groundwater according to sets of isothermal curves.” Sitzungsber K-K Akad der Wissenschaft, 126(4), 409–440 (in German).
Griffiths, D. V. (1984). “Rationalised charts for the method of fragments applied to confined seepage.” Geotechnique, 34(2), 229–238.
Harr, M. E. (1962). Groundwater and seepage, McGraw-Hill, New York, 315.
Hasofer, A. M., and Lind, N. C. (1974). “An exact and invariant first-order reliability format.” J. Eng. Mech. Div., 100(EM1), 111–121.
Meehan, C. L., and Benjasupattananan, S. (2012). “An analytical approach for levee underseepage analysis.” J. Hydrol., 470–471, 201–211.
Meehan, C. L., and Benjasupattananan, S. (2014). “Analytical approach for modeling axisymmetric levee underseepage.” J. Geotech. Geoenviron. Eng., 04013037.
Muskat, M. (1937). The flow of homogeneous fluids through porous media, McGraw-Hill, New York.
Pavlovsky, N. N. (1956). Collected works, Akad, Nauk USSR, Leningrad, Russia.
Slide v6.0–2D Limit Equilibrium Slope Stability Analysis [Computer software]. Rocscience, Toronto.
Turnbull, W. J., and Mansur, C. I. (1959). “Investigation of underseepage—Mississippi River levees.” J. Soil Mech. Found. Div., 85(4), 41–93.
USACE (U.S. Army Corps of Engineers). (1956). “Investigating underseepage and its control, lower Mississippi River levees.”, Waterways Experiment Station, Vicksburg, MS.
USACE (U.S. Army Corps of Engineers). (2000). “Design and construction of levees.”, Washington, DC, 164.
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© 2015 American Society of Civil Engineers.
History
Received: Apr 30, 2014
Accepted: Nov 19, 2014
Published online: Jan 5, 2015
Published in print: Apr 1, 2015
Discussion open until: Jun 5, 2015
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