Modified Dynamic CPTU Penetrometer for Fluid Mud Detection
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 138, Issue 2
Abstract
One particularly complex phenomenon is the episodic, tidally driven variation of navigable depth level as a result of fluid mud settlement. This paper presents results from dynamic cone penetration testing with pore pressure measurement (CPTU) as a nonacoustical, direct device to support surveying and management of these areas. The new technique is modular and uses a disk configuration for fluid mud detection. Both disk resistance and pore pressure measurements accurately identify suspended matter concentrations of or more, and the transition from fluid mud to consolidating mud once concentrations exceed . Hence, the procedure attests the potential for rapid, reliable assessment of a fluid mud layer and concurrent characterization of the underlying consolidated sediment by monitoring the pore pressure and strength changes during penetration.
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Acknowledgments
The authors thank the captain and crew of the vessel Delphin and Uwe Boekhoff (Emden port authorities) for their support during this study. The authors also thank the captain and crew of the vessel Friesland and Martin Krebs (Waterways and Shipping Board WSA Emden) for their cooperation. The Waterways and Shipping Directorate Aurich is acknowledged for kindly providing the water level data. M. Lange, H. Hanff, and N. Stark are acknowledged for assistance throughout the campaign. Funding was granted by DFGDFG (via MARUM Research Centre).
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 138 • Issue 2 • February 2012
Pages: 203 - 206
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Mar 19, 2009
Accepted: May 9, 2011
Published online: May 11, 2011
Published in print: Feb 1, 2012
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