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Evaluation of Condition of Lake Superior Regulatory Structure. Sault Ste. Marie, Michigan

机译：上湖地区治理结构状况评价。 sault ste。玛丽，密歇根州

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In May 1978 the U.S. Army Engineer District, Detroit (NCE) requested the U.S. Army Engineer Waterways Experiment Station (WES) to participate in the organization and execution of a program to accomplish detailed testing to determine the condition of the Lake Superior Regulatory Structure and its foundation. WES helped to plan and direct a testing program that included nondestructive and microseismic tests, concrete core drilling, laboratory analysis of core samples, tests and analysis of the steel structure and machinery, structural analysis of the substructure and superstructure, and preparation of written reports and recommendations. Nondestructive tests performed on the gates and operating machinery, and the concrete piers indicate that there has been no appreciable loss in gate skin thickness, that the rivets are sound, and that the concrete in the piers is of generally good to excellent quality. Load tests performed on the gate lifting machinery showed that the loads present during normal operation of the gates are compatible with design loads. Some difference was noticed in loads between the sides of gates No. 9 and 10. Laboratory tests of the concrete cores indicate some minor amounts of surface frost-damaged concrete in three of the piers, and some alkali-silica reaction damage in one of those three.

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