Geophysical and Nuclear Methods for Non-Destructive Evaluation of Caissons

by 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,

Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices


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 | Construction methods | Foundation construction | Pile foundations | Deep foundations | Nondestructive tests | Concrete | Concrete construction | Ohio | United States

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