EFFECT OF DRAINAGE OCCLUSION ON SLOPE STABILITY IN EARTHEN DAMS WITH PARTIALLY SATURATED SOILS
Abstract
At present, the construction of earth dams confers on the stability of slopes an engineering importance of the first order, as much for the economic aspect as for the undesirable consequences due to their failures. In the design of earth dams, a topic that has hardly been analyzed is the occlusion of drainage, associated with the loss of stability of the slope downstream. The present investigation is based on modeling 22-meter-high ground dams with partially saturated soils including their foundations, with a prism for drainage, to which the area will be gradually modified, to guarantee functionality between 100% and 40% of the area. original design area, under conditions of partial and total saturation of the curtain material. The computer program GeoStudio is used, specifically with the tools: SIGMA / W, SEEP / W and SLOPE / W. The calculation methods used will be the Finite Element Method and the Morgestern-Price method, to explore the influence of drain occlusion on the stability of the slope downstream on land dams. It is concluded that there is no influence of the analysis under conditions of partial saturation on the stability when considering the occlusion of the drain, for the case study analyzed.
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