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Geotechnical Aspects of Strontia Springs Arch Dam

by Nathan R. Hopton, Harza Engineering Co, Chicago, IL, USA,
Farrukh M. Mazhar, (M.ASCE), Harza Engineering Co, Chicago, IL, USA,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

The bedrock at the Strontia Springs damsite consists of generally excellent quality granitic and metamorphic rock, except for a wide shear zone located beneath the dam in the lower valley and upstream of the dam in the abutments. This shear zone forms the major geologic weakness at the site, necessitating special slope and foundation treatment designs. These special considerations include multirow grout curtains, a multirow drain curtain, extensive rock bolting and shotcrete measures in rock excavation slopes and close monitoring during operation of the project. The details of the foundation treatment design and construction are discussed, and the results of monitoring during construction are presented.

Subject Headings: Dam foundations | Arch dams | Foundation design | Infrastructure construction | Slopes | Rockfill dams | Foundation construction

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