Análise do comportamento da barragem de pequeno porte Estrada Dique - Aracati, CE - em caso de cheia repentina

Abstract

The present work objective to analyze the behavior of the Estrada Dique small dam, in Aracati - CE, built from 1982 to 1987. The study considers a hypothetical case of sudden flooding in the Vale Jaguaribano. For this used the software SEEP / W and SLOPE / W, in order to perform an analysis of the dam slope stability. The study is justified by the high potential damage associated in economic, social, environmental or loss of life. Although it is a small project in its vertical extension (4 m), its length (7 km) should be considered. Thus, the volume contained in the reservoir sudden flood hypothesis becomes relevant. This work characterizes the material extracted from the natural deposit used in the dam construction and the slope stability analysis for three transverse sections (ST01, ST02 and ST03), located in different parts of the project. It is concluded that the soil is a poorly graded silt sand and that the safety factors (FS) found are unsatisfactory, that is, lower than those adopted in the literature (1,5). The smallest FS is in ST03 and is equivalent to 1.063, for ST01 and ST02, this value differs from the previous one, being 1.175 and 1.292 respectively. It should be noted that the simplifications adopted may interfere with the results obtained, thus suggesting a more detailed analysis of the material used and especially the foundations. Thus it is necessary to restructure and maintenance the Estrada Dique Dam - Aracati / CE, given its relevance to the municipality.