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Static and pseudo-static stability analysis of right earthen embankment of nagarjuna sagar dam by geostudio
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Static and pseudo-static stability analysis of right earthen embankment of nagarjuna sagar dam by geostudio
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Journal Article
Static and pseudo-static stability analysis of right earthen embankment of nagarjuna sagar dam by geostudio
2023
Overview
To ensure the safety of the dam, stability assessment of the dam is necessary. The objective is to perform slope stability analysis for upstream, downstream and seepage analysis during steady state, transient seepage conditions and to know about the displacement occurred at history nodes by the application of pseudo-static ground motion. The present work deals with the behavior of the Right earthen embankment of Nagarjuna Sagar which is in earthquake prone area of Zone-II (as per IS 1893-2002). Stability parameters slope, seepage and earthquake analyzed by SLOPE/W, SEEP/W, QUAKE/W tools in GeoStudio 2022 (finite element modeling based software). The model with full reservoir level is first analyzed by SEEP/W to find piezometric line which is basis to perform SLOPE/W for finding slope stability. Later an earthquake motion of 0.1 peak ground acceleration is subjected to it by using QUAKE/W. It is concluded from results, that obtained factor of safety lie within safety limits and seepage loss observed during the design life of 100 years is 562290 m 3 , 3431117 m 3 for steady state and rapid drawdown.
