Modified dynamic CPTU penetrometer for fluid mud detection / Annedore Seifert in Journal of geotechnical and geoenvironmental engineering, Vol. 138 N° 2 (Fevrier 2012)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 138 N° 2 (Fevrier 2012) . - pp. 203-206 Titre : Modified dynamic CPTU penetrometer for fluid mud detection Type de document : texte imprimé Auteurs : Annedore Seifert, Auteur ; Achim Kopf, Auteur Année de publication : 2012 Article en page(s) : pp. 203-206 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Fluid mud Cohesive soils Cone penetration testing Résumé : 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. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v138/i2/p203_s1?isAuthorized=no [article] Modified dynamic CPTU penetrometer for fluid mud detection [texte imprimé] / Annedore Seifert, Auteur ; Achim Kopf, Auteur . - 2012 . - pp. 203-206. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 2 (Fevrier 2012) . - pp. 203-206 Mots-clés : Fluid mud Cohesive soils Cone penetration testing Résumé : 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. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v138/i2/p203_s1?isAuthorized=no

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