Analytical Investigation of Friction Sleeve Length Effects on Stratigraphic Interpretation
Publication: International Journal of Geomechanics
Volume 6, Issue 1
Abstract
This paper presents an analytical investigation of the ability of friction sleeves of varying lengths to reliably identify layer interfaces and stratigraphic anomalies within the subsurface. Analytical and parametric analyses were performed using synthetic sleeve profiles that are statistically equivalent to piezocone penetration test profiles, thereby enabling study of realistic profiles with known statistical properties. This approach demonstrates that the standard friction sleeve lengths can cause incorrect interpretations of the location of distinct interfaces and of the sleeve friction measurements near this interface. The study also shows that the vertical extent of thin anomalies can be overestimated and the frictional characteristics of the soil within the anomaly can be incorrectly interpreted if the length of the friction sleeve relative to the thickness of the anomaly is not considered.
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Acknowledgment
The work performed in this study has been partially supported by the National Science Foundation Grant No. NSFCMS-9978630. This support is gratefully acknowledged.
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Information
Published In
International Journal of Geomechanics
Volume 6 • Issue 1 • January 2006
Pages: 11 - 29
Copyright
© 2006 ASCE.
History
Received: Mar 9, 2004
Accepted: Jul 19, 2004
Published online: Jan 1, 2006
Published in print: Jan 2006
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