Seismic Stability Modification Designs for Embankment Dams

by Karl Dise, U.S. Bureau of Reclamation, Boise, United States,



Document Type: Proceeding Paper

Part of: Geotechnical Practice in Dam Rehabilitation

Abstract:

The Bureau of Reclamation (Reclamation) has recently designed rehabilitations for four embankment dams to ensure their seismic stability. A fifth project is scheduled for construction. Reclamation designs called for treatment of liquefiable foundation materials with combinations of dynamic compaction, soil mixing walls, and soil replacement. A liquefiable embankment was removed in one case, and stability berms were designed to buttress the competent embankments in the other four cases. This paper summarizes the policy and criteria, evaluation procedures, and acceptance methods used by Reclamation for these remediations as well as lessons learned in accomplishing them.

Subject Headings: Embankment dams | Soil liquefaction | Soil mixing | Compacted soils | Foundation design | Soil-structure interaction | Soil analysis

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