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Karl Terzaghi / Jonathan Fannin in Journal of geotechnical and geoenvironmental engineering, Vol. 134 N°3 (Mars 2008) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 134 N°3 (Mars 2008) . - pp. 267–276 Titre : Karl Terzaghi : from theory to practice in geotechnical filter design Type de document : texte imprimé Auteurs : Jonathan Fannin, Auteur Année de publication : 2008 Article en page(s) : pp. 267–276 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Sand  Gravel  Filters  Pipes  Design Résumé : In a period of just over 10 years, Karl Terzaghi proved the idea of a weighted filter in simple laboratory tests while on faculty at the American Robert College in Turkey, patented the concept, developed empirical rules for the grain size distribution of filter through specialist consulting advice on relatively small weirs in Europe, and firmly established those rules as a basis for engineering practice on the Bou-Hanifia Dam in North Africa. The Terzaghi filter criteria are commonly attributed to experience gained on that latter project. However, an evaluation of unpublished letter reports, contract documents, and correspondence suggests the evolution of those criteria for soil retention and permeability occurred during his earlier collaboration with the Austrian consulting company of J. Pfletschinger & Co. This new insight appears to be confirmed by the uncovering of a draft patent claim, prepared in the name of Josef Pfletschinger, which sets out the precise details of those filter criteria and whose existence was acknowledged in contract documents for Bou-Hanifia. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A3%2826 [...] [article] Karl Terzaghi : from theory to practice in geotechnical filter design [texte imprimé] / Jonathan Fannin, Auteur . - 2008 . - pp. 267–276. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 134 N°3 (Mars 2008) . - pp. 267–276 Mots-clés : Sand  Gravel  Filters  Pipes  Design Résumé : In a period of just over 10 years, Karl Terzaghi proved the idea of a weighted filter in simple laboratory tests while on faculty at the American Robert College in Turkey, patented the concept, developed empirical rules for the grain size distribution of filter through specialist consulting advice on relatively small weirs in Europe, and firmly established those rules as a basis for engineering practice on the Bou-Hanifia Dam in North Africa. The Terzaghi filter criteria are commonly attributed to experience gained on that latter project. However, an evaluation of unpublished letter reports, contract documents, and correspondence suggests the evolution of those criteria for soil retention and permeability occurred during his earlier collaboration with the Austrian consulting company of J. Pfletschinger & Co. This new insight appears to be confirmed by the uncovering of a draft patent claim, prepared in the name of Josef Pfletschinger, which sets out the precise details of those filter criteria and whose existence was acknowledged in contract documents for Bou-Hanifia. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A3%2826 [...]