The Sand Dam

by C. Y. Ki, (F.ASCE), Staff Consultant; Technoconsult, Venezuela,
Jesus Yague, Proj. Mgr.; Technoconsult, Venezuela,


Serial Information: Civil Engineering—ASCE, 1984, Vol. 54, Issue 6, Pg. 46-49


Document Type: Feature article

Abstract:

Currently under construction is the 443 ft. high sand fill dam. Being erodible, pervious and liquefiable, sand would normally be considered as n unsuitable material to construct LaVueltosa dam because it is of large height, founded on poor rock with fractures, and located in seismic active region. But the selected design is believed to be the most adaptable, economical and with high safety factor. The design against high piping failure potential is based on two concepts: (a) complete confinement of sand fill to prevent embankment piping; and (b) multiple defense lines to control underseepage to prevent foundation piping. The high safety against earthquakes is based on the fact that the sand can be compacted to 100% modified Proctor density.

Subject Headings: Sandy soils | Pipes | Safety | Foundation design | Fills | Economic factors | Dams

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