Research Article
Jan 1958
Friction Measurements in the Apalachia Tunnel
Publication: Transactions of the American Society of Civil Engineers
Volume 123, Issue 1
Abstract
The Apalachia power tunnel of the Tennessee Valley Authority was in continuous operation from its opening in 1943 until October, 1953, at which time it was unwatered and inspected. The tunnel surfaces were found to be covered with a uniform, 5/16-in. deposit of a black mucilaginous material. Friction measurements were made in the tunnel in 1944, five months after the initial filling, and in 1954, five months after the inspection.
The paper presents the methods used in reducing both sets of data. The results are presented in terms of the friction coefficient, f, in the Weisbach equation. Values of n for the Manning equation are also shown. A description is given of each type of surface for which coefficients could be determined.
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© 1958 American Society of Civil Engineers.
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Published in print: Jan 1958
Published online: Feb 10, 2021
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Rex A. Elder, M.ASCE
Head, Hydr. Lab., Div. of Water Control Planning, Hydr. Data Branch, Tennessee Valley Authority, Norris, Tenn.
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