Geophysical and Nuclear Methods for Non-Destructive Evaluation of Caissonsby Barry R. Christopher, STS Consultants Ltd, United States,
Clyde N. Baker, Jr., STS Consultants Ltd, United States,
Dennis L. Wellington, STS Consultants Ltd, United States,
Abstract: Non-destructive testing techniques were used to confirm the concrete integrity on the caisson foundations for the 45-story Ohio Corporate Headquarters building in Cleveland, Ohio. The caissons are believed to be the deepest on the North American Continent, extending as much as 250 ft [76m] below ground surface and constructed entirely under water by tremie and pumped concrete techniques. The integrity testing program, including required calibration, is described and the results presented and discussed. Problems encountered during construction that were detected with the integrity testing program are also discussed.
Subject Headings: Caissons | Foundation construction | Seismic tests | Deep foundations | Concrete construction | Water management | Nondestructive tests | North America | Ohio | United States
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