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Title: Engineering condition survey and evaluation of Troy Lock and Dam, Hudson River, New York. Report 2, Evaluation and rehabilitation
Authors: Structures Laboratory (U.S.)
United States. Army. Corps of Engineers. New York District.
Pace, Carl E.
Campbell, Roy L., 1942-
Wong, G. Sam.
Keywords: Concrete cores
Concrete dams
Concrete deterioration
Engineering Condition Survey
Locks (Waterways)
Stability Analysis
Troy Lock 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-78-6 rept.2.
Description: Miscellaneous paper
Abstract: The monoliths of Troy lock, dam, and headgate section must be rehabilitated in the near future or the concrete deterioration will progress to the point that the total structure will have to be replaced. Two specific areas of the structure are now in such a state of deterioration that they essentially will have to be replaced. The concrete in the land wall monoliths upstream of the upper gate have depths of deteriorated concrete in excess of 5 ft. The upper sections of the gated spillway to the powerhouse are so deteriorated that enough sound concrete would not remain for rehabilitation; replacement of the upper sections will be more efficient. The other portions of the lock and dam are generally sound (4000-to 5000-psi concrete interiors) and are adequate for effective and economical rehabilitation. The concrete tensile strength is low because of minor alkali-silica reaction products and ettringite coating of aggregates but it is adequate and is expected to remain adequate. The compressive (900 psi) and tensile (43 psi) strengths of the foundation material are very low but are adequate to resist bearing pressures and give excellent resistance for foundation anchors. There are no soft seams in the slaty-shale foundation. The foundation was very consistent. The predominant geological feature is bedding planes which dip downstream at 30 to 90 deg. This does not present any potential stability problems. Even though the construction joints leak badly, the second phase of study established that they are not deteriorated and do not require rehabilitation (except one in the river face of the river wall). The monoliths of the lock and dam are very inadequate in relation to stability requirements. The stability analysis and proposed remedial measures are presented. Recommendations are made for post-tensioning and reaction block designs. After post-tensioning, base pressures are within allowables. Remedial actions for Troy lock, dam, and headgate section are recommended. The headgate monolith could fail when subjected to extreme ice loading unless remedial measures are accomplished. It is essential that the rehabilitation of Troy lock, dam, and headgate section be accomplished in the near future or they will become deteriorated to the extent that replacement will be necessary. NOTE: This file is large. Allow your browser several minutes to download the file.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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