Engineering Condition Survey and Structural Investigation of Emsworth Locks and Dam, Ohio River.
Final rept. Oct 74-Aug 76,
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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The Concrete Laboratory at the U.S. Army Engineering 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 anaysis 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 observations of a 1-12 in. separation between the ceiling of the emptying culverts and the middle wall indicates taht 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.
- Civil Engineering