Modified Dynamic CPTU Penetrometer for Fluid Mud Detection
Autor: | Annedore Seifert, Achim J Kopf |
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Rok vydání: | 2012 |
Předmět: | |
Zdroj: | Journal of Geotechnical and Geoenvironmental Engineering. 138:203-206 |
ISSN: | 1943-5606 1090-0241 |
Popis: | 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 90 g/L or more, and the transition from fluid mud to consolidating mud once concentrations exceed 150 g/L. 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. |
Databáze: | OpenAIRE |
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