Correlation between OCR and Depth for Deep‐Sea Sediments
Publication: Journal of Geotechnical Engineering
Volume 116, Issue 11
Abstract
An analysis of the apparent overconsolidation properties of deep-sea abyssal plain sediments taken from holes DSDP 576A and MPG-1 is presented. Apparent overconsolidation is believed to be caused by interparticle bonding, or cementation. The cementation can be caused by any one or a combination of the following: silica, potassium, calcium carbonate, ferric oxide, manganese, or biological excretions. Plotting OCR versus depth is shown to result in a ``spurious correlation'' because both depth and OCR have the same independent variable in common, namely depth (z). An alternative method for presenting consolidation information is to plot preconsolidation stress versus depth, particularly when the depth is small. Using this procedure plots of overburden and preconsolidation stresses versus depth indicates that for hole 576A an overconsolidated condition exists down to a depth of 35 m. Below this depth an apparent condition of underconsolidation exists. Hole MPG-1 shows an over consolidated condition exists to the maximum depth investigated of 3.5 m.
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Information
Published In
Journal of Geotechnical Engineering
Volume 116 • Issue 11 • November 1990
Pages: 1744 - 1749
Copyright
Copyright © 1990 ASCE.
History
Published online: Nov 1, 1990
Published in print: Nov 1990
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