Abstract
Construction of earthen dams has developed quickly to access water and electricity. The earthquake phenomena can generate cracks at the crest, and transferred them to the structural body. It has occurred during the interaction between structure and reservoir. In this context, some reinforcement techniques have experienced according to the literature. They have included a perpendicular drain, prefabricated vertical drain, Geosynthetic in some layers within the structure, Pile, injection and cut off wall system on the dam foundation. Most of them controlled this aspect costly. The Finite-element method has applied via plane strain aspect using the ANSYS13. This paper evaluated effects of using blanket layer between a short homogenized earthen dam and weak foundation on the dynamic behavior throughout the seismic process. As a result, clay soil in the blanket layer with a modulus elasticity ratio equal to 2.50 between it, and loose sand of foundation has indicated the optimal approach. It has revealed that, this method can be changed the situation of the minimum and maximum value of shear stress when it has located in the middle of the foundation without the blanket layer at the end of vibration.
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