Comparison of Caisson Load Tests on Chicago Hardpan

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by Clyde N. Baker, Jr., STS Consultants Ltd, Northbrook, IL, USA,

Document Type: Proceeding Paper

Part of: Drilled Piers and Caissons II:

Abstract: The results from two relatively recent instrumented caisson load tests from different sites on Chicago Hardpan are compared with a 'classic' large scale caisson load test program performed in 1921. Actual bearing capacities, side friction values and settlement are compared with that predicted by different theories. No single theory fits the measured bearing capacities and friction values, but settlement predicted by pressuremeter theory based on actual site specific pressuremeter test data agrees well (within 15%) with the reported measured settlement.

Subject Headings: Load tests | Load factors | Caissons | Soil settlement | Comparative studies | Foundation settlement | Load bearing capacity | Soil pressure | Friction | North America | Illinois | United States | Chicago

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