Authors: Krikar M-Gharrib Noori1 & Hawkar Hashim Ibrahim2 & Ahmed Mohammed Hasan3
1Koya Technical Institute, EPU, Koya, Iraq
2&3Civil Engineering Department, College of Engineering, Salahaddin University, Erbil, Iraq
Abstract: Seepage is one of the main causes of earth dam failure. Concerning the failure, the control of seepage is required. In this study, the analyses of seepage problem were performed on Shiwashok earth dam body and its foundation. This study has concentrated on the efficiency of using upstream blanket to reduce seepage discharge and the uplift pressure of Shiwashok earth dam in Kurdistan region of Iraq. To meet the aims of this study, different clay blanket lengths and thicknesses were investigated. Two dimensional simulations of 23m high Shiwashok earth dam were carried out using the numerical analysis SEEP/W software using existing data of the geometrical and mechanical properties of the earth dam and its foundation. The outcomes showed that lengthening the clay blanket and increasing blanket thickness reduced the percentage of seepage amount and uplift pressure at the downstream side of the dam. It can be concluded from the results of the simulations that the optimum blanket length (BL) and the blanket thickness (t) were 80m, and 1m to 1.5m, respectively.
Keywords: Seepage Control, Clay Blanket, Shiwashok Earth Dam, SEEP/W
Download the PDF Document from here.
Coduto, D. P., Yeung, M.-C. R., & Kitch, W. A. (2011). Geotechnical engineering : Principles and practices. Upper Saddle River: Pearson.
GEO-SLOPE. (2008). Seepage Modeling with SEEP/W 2007. Calgary, Alberta, Canada: GEO-SLOPE International Ltd.
Goharnejad, H., Noury, M., Noorzad, A., Shamsaie, A., & Goharnejad, A. (2010). The effect of clay blanket thickness to prevent seepage in dam reservoir. Res. J. Environ. Sci. Research Journal of Environmental Sciences, 4(6), 558-565.
James, L., Sherard, J., & Stanley, F. G. (1992). Earth and earth-rock dams: Engineering problems of design and construction. Ann Arbor (Mich.): UMI.
Peter, P. (1982). Canal and river levees. Developments of civil engineering. Vol. 29: Elsevier/North-Holland, Inc., New York.
Rezk, M. M., & Senoon, A. A. (2012). Analytical solution of earth dam with upstream blanket. Alexandria Engineering Journal, 51(1), 45-51. doi: https://doi.org/10.1016/j.aej.2012.01.004
Tatone, B., Donnelly, C., Protulipac, D., & Clark, C. (2009). Evaluation of the hydraulic efficiency of a newly constructed plastic concrete cut-off wall. Paper presented at the Proc., 2009 Canadian Dam Association Annual Conf.
United, S., Army, & Corps of, E. (1994). Engineering and design. general design and construction considerations. [Washington, D.C.]: U.S. Army Corps of Engineers.
USBR. (2014). Embankment Dams, Chapter 8: Seepage Washington, D.C.: U.S. Department of the Interior, Bureau of Reclamation.
Williams, E. (1986). Seepage Analysis and Control for Dams. Department of the Army US Army Corps of Engineers, Washington.