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Pile setup in cohesive soil / Kam W. Ng in Journal of geotechnical and geoenvironmental engineering, Vol. 139 N° 2 (Février 2013) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 139 N° 2 (Février 2013) . - pp. 199-209 Titre : Pile setup in cohesive soil : I: experimental investigation Type de document : texte imprimé Auteurs : Kam W. Ng, Auteur ; Matthew Roling, Auteur ; Sherif S. AbdelSalam, Auteur Année de publication : 2013 Article en page(s) : pp. 199-209 Note générale : geotechnique Langues : Anglais (eng) Mots-clés : pile  setup;  load  tests;  cohesive  soil;  coefficient  of  consolidation;  undrained  shear  strength;  standard  penetration  test  (SPT)  N-value Résumé : Pile setup in cohesive soils has been a known phenomenon for several decades. However, a systematic field investigation to provide the needed data to develop analytical procedures and integrate pile setup into the design method rarely exists. This paper summarizes a recently completed field investigation on five fully instrumented steel H-piles embedded in cohesive soils, while a companion paper discusses the development of the pile setup method. During the field investigation, detailed soil characterization, monitoring of soil total lateral stress and pore-water pressure, collection of pile dynamic restrike data as a function of time, and vertical static load tests were completed. Restrike measurements confirm that pile setup occurs at a logarithmic rate following the end of driving, and its development correlates well with the rate of dissipation of the measured pore-water pressure. Based on the field data collected, it was concluded that the skin friction component, not the end bearing, contributes predominantly to the setup, which can be accurately estimated for practical purposes using soil properties, such as coefficient of consolidation, undrained shear strength, and the standard penetration test N-value. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000751 [article] Pile setup in cohesive soil : I: experimental investigation [texte imprimé] / Kam W. Ng, Auteur ; Matthew Roling, Auteur ; Sherif S. AbdelSalam, Auteur . - 2013 . - pp. 199-209. geotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 139 N° 2 (Février 2013) . - pp. 199-209 Mots-clés : pile  setup;  load  tests;  cohesive  soil;  coefficient  of  consolidation;  undrained  shear  strength;  standard  penetration  test  (SPT)  N-value Résumé : Pile setup in cohesive soils has been a known phenomenon for several decades. However, a systematic field investigation to provide the needed data to develop analytical procedures and integrate pile setup into the design method rarely exists. This paper summarizes a recently completed field investigation on five fully instrumented steel H-piles embedded in cohesive soils, while a companion paper discusses the development of the pile setup method. During the field investigation, detailed soil characterization, monitoring of soil total lateral stress and pore-water pressure, collection of pile dynamic restrike data as a function of time, and vertical static load tests were completed. Restrike measurements confirm that pile setup occurs at a logarithmic rate following the end of driving, and its development correlates well with the rate of dissipation of the measured pore-water pressure. Based on the field data collected, it was concluded that the skin friction component, not the end bearing, contributes predominantly to the setup, which can be accurately estimated for practical purposes using soil properties, such as coefficient of consolidation, undrained shear strength, and the standard penetration test N-value. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000751