Engineering Condition Survey and Structural Investigation of Locks and Dam 3, Monongahela River.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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The results of an engineering condition survey and a structural analysis of Locks and Dam 3, Monongahela River, are given. External cracking of the concrete in the lock walls is extensive. Many horizontal and vertical cracks, although isolated and not fitting into a total failure picture, can result in localized failures, especially in critically stressed regions. The outer 2 to 6 ft of concrete as described in the core and photo logs are highly deteriorated. The same condition probably exists in the outer surface of the walls to lower pool. The internal concrete is generally of adequate strength for current design criteria. One exception is a small zone in the downstream gate monolith of the middle wall a compressive strength of 1150 psi was obtained on the concrete from this zone. The concrete is in a critically stressed area immediate remedial action is recommended. Pressure grouting as an interim measure is suggested. There is one possible continuous crack in gate monolith R-23 it runs for a depth of 35 ft and possibly extends for two-thirds of the monolith to the riverside.
- Civil Engineering
- Construction Equipment, Materials and Supplies