Effect Analysis of Seismic Liquefaction on Reservoir Earth-Rockfill Dam Foundations Based on Practical Two-surface Plastic Sand Model
To solve the problem of serious dam body deformation,slope instability,and other disasters due to seismic liquefaction of reservoir earth-rockfill dam foundations thus posing a serious threat to long-term safe operation of reservoir earth-rockfill dams,taking a reservoir earth-rockfill dam as an example,finite difference software FLAC3D 7.0 and its built-in practical two-surface plastic sand model(P2PSand model)were used to analyze seismic dynamic responses of the reservoir earth-rockfill dam with a seismic liquefaction foundation.The results show that seismic intensity and relative compactness have a great influence on seismic liquefaction trend of the reservoir earth-rockfill dam foundation.The excess pore pressure ratio increases gradually with the seism process,and the increase is about 10.46% .With the increase of seismic liquefaction degree of the dam foundation,the deformation of dam body becomes more obvious,and the slope stability of the dam foundation decreases.
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