RCC for Rehabilitation of Dams in the USA-An Overviewby Kenneth D. Hansen, Portland Cement, Denver, United States,
Abstract: The use of roller-compacted concrete (RCC) has rapidly become a powerful new tool in the USA for engineers involved with the rehabilitation of existing dams. Starting in 1980, RCC has been used to improve 25 existing embankment dams and three concrete dams as well as to completely replace seven failed or distressed dams. The development of design and construction concepts which allow for the use of RCC to hydraulically upgrade embankment dams to provide for overtopping during floods is discussed. For complete replacement projects, foundation design and improvements to accommodate RCC gravity dams are emphasized. Construction methods, production rates and RCC costs are presented for small volume projects. Performance of completed RCC projects when subjected to overtopping is documented.
Subject Headings: Concrete dams | Embankment dams | Gravity dams | Rehabilitation | Dams | Dam failures | Wave overtopping | Infrastructure construction | Hydraulic design | North America | United States
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