The main control shaft for Fort Peck tunnel 4 incloses two concentric towers, with an annular water passage between. The towers are interconnected near their bases by six ports, the discharge through which is controlled by a cylinder gate. Model investigation of the control structure was concerned with the elimination of cavitation in the port liner castings and reduction of harmful vibration of the cylinder gates. The following alterations to the existing design were investigated: Partition walls; guide vanes; air vents; offsets in the inner tower of the control structure; guide vans; dividing walls; and roof cap or baffles in the outer water passage of the control structure.
Modifications of Control Shaft, Fort Peck Dam Tunnel 4, Missouri River, Montana; Hydraulic Model Investigation
1959
90 pages
Report
No indication
English
Civil Engineering , Dams , Underground structures , Rivers , Montana , Design , Hydraulic models , Model tests , Floods , Navigation , Drainage , Control , Walls , Vents , Fluid flow , Baffles , Statistical data , Fort Peck Dam Tunnel 4 , Missouri River , Control shafts , Cylinder gates
Modifications of control shaft, fort peck dam tunnel 4, Missouri river, Montana
Engineering Index Backfile | 1959
|Fort Peck Tunnel No. 1 Rehabilitation, Fort Peck Dam, Montana
HENRY – Federal Waterways Engineering and Research Institute (BAW) | 1993
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