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Design Considerations for a Penstock Located in an Outlet Tunnel at the Jennings Randolph Dam in West Virginia

by Jey K. Jeyapalan, Hardy BBT, Inc, United States,
Carlos A. Jaramillo, Hardy BBT, Inc, United States,
Wesley Saleira, Hardy BBT, Inc, United States,



Document Type: Proceeding Paper

Part of: Waterpower '89

Abstract:

The proposed production of hydropower at this flood control-recreation dam involves the installation of a 78 inch diameter steel penstock at the crown of the existing tunnel. The penstock will be supported by a series of rock anchors along the entire length of the penstock inside the tunnel. The objectives of the analyses and the design presented in this paper were: to perform feasibility studies on the design and construction of a steel penstock inside the tunnel and its support system; to design the penstock wall to resist all types of forces exerted by the water and other environmental conditions for the normal and emergency operating conditions; to design hangers to support the penstock along its entire length inside the tunnel, and to resist all types of forces exerted by water, penstock, and other environmental conditions for the normal and emergency operating conditions; to design the concrete encasement around the upper half of the penstock to provide more uniform support to the penstock, and to streamline the flow conditions in the tunnel; to design the pretensioned anchors in rock to support the penstock; and to perform appropriate hydraulic model studies to determine the important data to complete the design of the penstock, and the support system.

Subject Headings: Conduits | Tunnels | Hydraulic design | Hydro power | Feasibility studies | Rocks | Concrete dams | West Virginia

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