A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
R. D. Bailey Outlet Works Guyandot River, West Virginia. Hydraulic Model Investigation
During the construction of the R. D. Bailey Dam, uncontrolled flow through the outlet works exceeded the design discharge of 7,500 cfs on numerous occasions. The outlet channel was severely eroded during this diversion period resulting in tailwater elevations much lower than that required for adequate energy dissipation in the outlet works stilling basin. A tailwater dam was proposed for construction in the outlet channel to raise the tailwater elevation sufficiently for a hydraulic jump to form in the basin. Tests were conducted on a 1:25-scale section model of the tailwater dam and a 1:25-scale general model of the outlet works and appurtenances to determine the effectiveness of the tailwater dam and to make further modifications to improve hydraulic performance, if necessary. The 1:25-scale general model reproduced the intake structure, transition, tunnel, stilling basin, outlet channel, and the proposed tailwater dam. Flow conditions observed in the general model with a 7,500-cfs discharge indicated adverse flow conditions in the outlet works stilling basin and the tailwater dam stilling basin. With a 5,000-cfs discharge, satisfactory, flow conditions existed in the outlet works stilling basin and the tailwater dam stilling basin. The adequacy of the proposed stone slope protection for the outlet channel was tested, and results indicated that the riprap was adequate for discharges of 5,000 cfs and less. Since controlled releases can be limited to 5,000 cfs, the tailwater dam as originally designed was considered acceptable.
R. D. Bailey Outlet Works Guyandot River, West Virginia. Hydraulic Model Investigation
During the construction of the R. D. Bailey Dam, uncontrolled flow through the outlet works exceeded the design discharge of 7,500 cfs on numerous occasions. The outlet channel was severely eroded during this diversion period resulting in tailwater elevations much lower than that required for adequate energy dissipation in the outlet works stilling basin. A tailwater dam was proposed for construction in the outlet channel to raise the tailwater elevation sufficiently for a hydraulic jump to form in the basin. Tests were conducted on a 1:25-scale section model of the tailwater dam and a 1:25-scale general model of the outlet works and appurtenances to determine the effectiveness of the tailwater dam and to make further modifications to improve hydraulic performance, if necessary. The 1:25-scale general model reproduced the intake structure, transition, tunnel, stilling basin, outlet channel, and the proposed tailwater dam. Flow conditions observed in the general model with a 7,500-cfs discharge indicated adverse flow conditions in the outlet works stilling basin and the tailwater dam stilling basin. With a 5,000-cfs discharge, satisfactory, flow conditions existed in the outlet works stilling basin and the tailwater dam stilling basin. The adequacy of the proposed stone slope protection for the outlet channel was tested, and results indicated that the riprap was adequate for discharges of 5,000 cfs and less. Since controlled releases can be limited to 5,000 cfs, the tailwater dam as originally designed was considered acceptable.
R. D. Bailey Outlet Works Guyandot River, West Virginia. Hydraulic Model Investigation
J. E. Hite (author)
1984
56 pages
Report
No indication
English