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|Title:||Engineering condition survey and structural investigation of Emsworth Locks and Dam, Ohio River|
|Authors:||United States. Army. Corps of Engineers. Pittsburg District.|
Pace, Carl E.
Emsworth Locks and Dam
|Publisher:||Concrete Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; C-76-8.|
Abstract: The Concrete Laboratory at the U. S. Army Engineer Waterways Experiment Station was contracted to prepare an engineering condition survey and structural investigation for Locks and Dam 3, Monongahela River, and Emsworth and Montgomery Locks and Dams, Ohio River. This report gives the results of an engineering condition survey and a structural analysis of Emsworth Locks and Dam, Ohio River. In general, the monoliths on the land wall do not meet present day criteria for overturning, sliding, or base pressures. Also, some monoliths in the middle and river walls do not meet present day stability requirements. In fact, the stability analysis of M-22 along with the visual observation of a 1-1/2 in. separation between the ceiling of the emptying culverts and the middle wall indicates that there has been some movement of these middle wall monoliths. The main concern for concrete integrity is the cracked, spalled, and deteriorated surface concrete which will allow accelerated deterioration reducing the effective section of the monoliths increasing the already excessive tensile stresses. In general, if corrective measures are not taken, this will surely cause maintenance expense and will also reduce the life of the concrete monoliths. The compressive stresses are larger than indicated by the stress analysis and can also cause problems in deteriorated concrete. From the deteriorated condition of the surface of the lock monoliths, it is evident that some action must be initiated. Since corrective action is needed, a feasibility study should be made to determine what action is necessary which will provide the most economical and adequate lock usage over a period of 30 to 50 years. For this reason, it is recommended that a feasibility study be made considering the following alternatives: a. Minimum maintenance and protection of the locks and dam from weathering with-expected replacement when needed as determined by periodic inspections. b. Rehabilitation of locks and dam. c. Replacement of locks and dam. The above recommendations may be affected by a total structural and operational evaluation. In fact, this study does not evaluate the steel gates, bridge work, lock gates, or appurtenant mechanical or electrical facilities; these will be considered by the Pittsburgh District in the overall evaluation of the locks and dam.
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