Numerical Modeling Of Embankment Dams In Liquefiable Soils During Earthquakes

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Ethiopia has built several embankment dams up to the present day for different purposes.rnSome dams are situated in the rift valley, which is highly susceptible to high earthquakernnatural disasters. Dynamic loads induced by earthquakes are often major factors in therndesign of earth dams founded on liquefiable soil. Earthquake-induced stresses are majorrnfactors in determining the angles of the dam slopes and significantly influence thernselection of materials, the zoning of the dam, and the construction method. These haverntaken a great attention to dams constructed from loose or medium dense saturatedrncohesionless soils and subjected to strong ground shaking. This project aims to simulaternthe effect of earthquake shaking on the stability of the embankment dam on liquefiablernsoil using the finite element method-based state-of-the-art software package, Geo-Slopernsoftware. The numerical simulation of embankment dams on liquefiable soil has beenrncarried out by taking many factors into account. Among these factors, in this projectrnnumerical simulation has been made to see the effect of dam geometry, foundationrnmaterial property, and liquefiable soil foundation thickness on the stability of the damrnduring dynamic loading. The evaluation also has been made to determine the response ofrnthe embankment dam on liquefiable soil under different earthquake ground shakingrnconditions. This includes assessing the safety margins against the risks of failure due tornextreme scenarios, particularly soil liquefaction of the structure‟s foundation. A findingrnof this study shows that all those aforementioned factors have a significant impact on thernstability of the liquefiable foundation of the embankment dam under dynamic loading. Asrna result an embankment dam having with 1 to 3 slope ratios, 5 meter foundation thicknessrnwith dense sand foundation material can withstand 0.37g peak ground acceleration safelyrnwith respect to slope stability, deformation and liquefaction.

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Numerical Modeling Of Embankment Dams In  Liquefiable Soils During Earthquakes

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