Research Article
Sep 1964
Differential Settlement at Selfridge Air Force Base
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VIEW THE REPLYAuthors: George B. Wallace, M.ASCE, and William C. OttoAuthor Affiliations
Publication: Journal of the Soil Mechanics and Foundations Division
Volume 90, Issue 5
Abstract
Structural damage of buildings is noted after 25 yr of satisfactory service. Surveys for a 6-yr period have shown movements that tipped and warped floors and walls. Calculations show that variation in thickness of buried clay strata can result in detrimental movements following an extended period of acceptable settlement. In-situ studies of individual strata by embedded transformer gages at various depths show that critical movements occur in the deeper strata. Laboratory tests show that these deep clay strata are of low density, wet, soft, and sensitive. Actual movement of some foundations agreed with theoretical values, whereas others did not. Evidence, including data from nuclear probes, indicates that the free waterline has lowered unevenly in recent years. The resulting load increases, combined with shifting building loads, apparently have overstressed the low shearing resistance of the sensitive clays in some areas and caused in-situ remolding, with attendant abnormal settlements.
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Published In
Journal of the Soil Mechanics and Foundations Division
Volume 90 • Issue 5 • September 1964
Pages: 197 - 220
Copyright
© 1964 American Society of Civil Engineers.
History
Published in print: Sep 1964
Published online: Feb 12, 2021
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Authors
Affiliations
George B. Wallace, M.ASCE
Lt. Col., U.S. Air Force, Hdqtrs, Air Defense Command, Reserve Officer assigned to DCS/Civ. Engrg.,
William C. Otto
Chf., Foundation Branch, Detroit Dist., Corps of Engrs., Detroit, Mich.
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