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Structural assessment of a concrete dam based on uplift pressure monitoring / C. Bernstone in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N°1 (Janvier 2009) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N°1 (Janvier 2009) . - pp. 133–142 Titre : Structural assessment of a concrete dam based on uplift pressure monitoring Type de document : texte imprimé Auteurs : C. Bernstone, Auteur ; M. Westberg, Auteur ; J. Jeppsson, Auteur Année de publication : 2009 Article en page(s) : pp. 133–142 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Dams  Concrete  Uplift  pressure  Structural  reliability  Monitoring Résumé : The context of structural monitoring of concrete dams as part of hydropower assets management is described. A tool that fits well into this context is the control of the uplift pressure of concrete dams. A monitoring technique suitable for this purpose was developed based on an automated water-level measurement technique using time-domain reflectometry and standard air-dielectric coaxial cable sensors. The signal is interpreted automatically by applying a threshold method to determine the apparent water level, which is then used to calculate the uplift pressure. A field test at a concrete dam column displayed consistent results, which were used as input to a reliability-based stability safety analysis. The results show that this technique can be very useful for uplift pressure monitoring. The information determined can serve as input to the maintenance work as well as assist engineering decisions. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A1%2813 [...] [article] Structural assessment of a concrete dam based on uplift pressure monitoring [texte imprimé] / C. Bernstone, Auteur ; M. Westberg, Auteur ; J. Jeppsson, Auteur . - 2009 . - pp. 133–142. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N°1 (Janvier 2009) . - pp. 133–142 Mots-clés : Dams  Concrete  Uplift  pressure  Structural  reliability  Monitoring Résumé : The context of structural monitoring of concrete dams as part of hydropower assets management is described. A tool that fits well into this context is the control of the uplift pressure of concrete dams. A monitoring technique suitable for this purpose was developed based on an automated water-level measurement technique using time-domain reflectometry and standard air-dielectric coaxial cable sensors. The signal is interpreted automatically by applying a threshold method to determine the apparent water level, which is then used to calculate the uplift pressure. A field test at a concrete dam column displayed consistent results, which were used as input to a reliability-based stability safety analysis. The results show that this technique can be very useful for uplift pressure monitoring. The information determined can serve as input to the maintenance work as well as assist engineering decisions. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A1%2813 [...]