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Complex High-Rise Foundation Design and Construction

by Clyde N. Baker, Jr., STS Consultants Ltd, United States,
Stephen A. Bucher, STS Consultants Ltd, United States,
William F. Baker, Jr., STS Consultants Ltd, United States,



Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices

Abstract:

The substructure design and construction of a 60 story office tower in downtown Chicago is described. The presence of existing belled caissons on hardpan required use of filtered dewatering wells to lower the water table well into the very dense underlying silt and sand to permit new bell construction underneath the old caissons. Maximum allowable bearing pressure on the very dense silt and sand layer of 50 ksf (2395 kN/m²) was evaluated using in-situ pressuremeter testing. Predicted settlements compared favorably with actual settlements.

Subject Headings: Foundation design | Caissons | Foundation construction | Soil settlement | Soil pressure | Pile settlement | Foundation settlement | Chicago | Illinois | United States

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