Research Article
Aug 1976
Consolidation of Root-Penetrated Clays: A Case Study
Authors: Michael W. O'Neill, M.ASCE, Ronald Calsing, AM.ASCE, and B. Kent MerrittAuthor Affiliations
Publication: Journal of the Geotechnical Engineering Division
Volume 102, Issue 8
Abstract
The problem of predicting rates of settlement of clays penetrated by a network of tree roots was investigated by constructing two instrumented embankments within a common vegetative environment. The clays at the two sites had considerably different properties, but both were normally consolidated to slightly overconsolidated. Observations revealed that the tree roots act as efficient internal drains. Analytically, the roots were modeled as horizontally stacked drainage layers and as regularly spaced vertical drains in several rate prediction procedures. Drain characteristics were back-calculated based on observations at one fill and applied to the prediction of settlement rates of the other fill with generally good accuracy. This fact demonstrates that it is possible to predict the rate of settlement of a root-penetrated clay using existing computational methods properly modified to account for effective root spacing and diameter.
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Published In
Journal of the Geotechnical Engineering Division
Volume 102 • Issue 8 • August 1976
Pages: 857 - 873
Copyright
© 1976 American Society of Civil Engineers.
History
Published in print: Aug 1976
Published online: Feb 11, 2021
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Authors
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Michael W. O'Neill, M.ASCE
Asst.Prof., Dept. of Civ. Engrg.; Univ. of Houston, Tex
Ronald Calsing, AM.ASCE
Geotechnical Engr., Lockwood Greene, Inc., Spartanburg, S.C.
B. Kent Merritt
Geotechnical Engr., Southwestern Labs., Inc., Beaumont, Tex
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