RCC: rehab results. [Roller Compacted Concrete]
- Bureau of Reclamation, Denver, CO (United States)
- Portland Cement Association, Denver (United States)
Thirty U.S. dams have been modified with roller-compacted concrete to provide additional spillway capacity and for safe overtopping of embankment dams. Here the authors summarize design, construction and mix-proportion data for these projects and relate some lessons learned from dams that have experienced overtopping flows. In the national dam safety inspection performed by the U.S. Army Corps of Engineers from 1977 to 1981, hydraulic deficiencies led the list of major problems--specifically, the inability of a dam to retain or safely pass the probable maximum flood (PMF). Common solutions for solving a hydraulic deficiency include raising the dam to increase storage, increasing spillway capacity, providing for safe overtopping, breaching the dam, or some combination of the first three choices. Site conditions or high costs frequently make the first two methods infeasible, and functional needs usually make breaching unacceptable. Providing for overtopping protection may be the only reasonable solution. Use of roller-compacted concrete (RCC) for overtopping protection has proven to be an economical and effective way to increase the hydraulic safety of a dam.
- OSTI ID:
- 5808890
- Journal Information:
- Civil Engineering ASCE; (United States), Vol. 63:8; ISSN 0360-0556
- Country of Publication:
- United States
- Language:
- English
Similar Records
Protecting embankment dams with concrete block systems
RCC for seismic design. [Roller-Compacted Concrete]