Remedial Design and Construction to Improve a Sliding Embankment

by Sukhamnder Singh, Santa Clara Univ, Santa Clara, United States,

Document Type: Proceeding Paper

Part of: Geotechnical Practice in Dam Rehabilitation


The paper describes the studies made to identify the nature of possible remedial measures such as improved drainage, removal of the weak clay layer or a provision of a buttressed dam. The most effective means of improving the stability of the embankment was the removal of as much of the weak clay layer as possible and replacing it with a free draining granular material of higher strength. Since the removal of a portion of the embankment by itself creates a temporary stability problem, analyses were performed to evaluate statically safe construction slopes as well as the improvement in earthquake stability due to replacement of the weak clay layer. The paper presents alternatives representing progressively greater lengths of clay layer removal.

Subject Headings: Embankment dams | Soil stabilization | Soil analysis | Sliding effects | Landslides | Clays | Granular materials | Hydraulic design | California | United States

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