Design methodology for axially loaded auger cast-in-place and drilled displacement piles / Sungwon Park in Journal of geotechnical and geoenvironmental engineering, Vol. 138 N° 12 (Décembre 2012)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 138 N° 12 (Décembre 2012) . - pp. 1431–1441 Titre : Design methodology for axially loaded auger cast-in-place and drilled displacement piles Type de document : texte imprimé Auteurs : Sungwon Park, Auteur ; Lance A. Roberts, Auteur ; Anil Misra, Auteur Année de publication : 2013 Article en page(s) : pp. 1431–1441 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Augered pile T-z method Service limit state design Strength LRFD Parameter correlations Résumé : With the increasing use of augered cast-in-place and drilled displacement piles in new construction, it is important that proper design parameters be incorporated when evaluating pile performance using reliability-based design methods. Although augered piles can be distinguished from bored piles, including drilled shafts, and driven piles by the magnitude of the effective stress changes they produce in the vicinity of the pile during construction, the current design methods for augered piles generally use the same design methods as those used for bored or driven piles. To enhance the efficiency of the augered piles, a unique design method must be developed. This paper focuses on developing a design methodology for axially loaded augered piles installed in predominately sandy soils using the t-z method. To develop the design parameters for augered piles, back-calculation of the t-z parameters was conducted using static load–test data. The data from 17 static pile load tests conducted on augered piles from construction sites were obtained. Load-settlement and load-transfer curve fittings were performed using the t-z model to back-calculate a set of soil-pile interfacial and tip parameters, along with their variability. Correlations of the back-calculated t-z model parameters with the standard field investigation data were conducted, and the most-promising correlations were incorporated into the t-z model–based design methodology. Subsequently, the t-z method for augered pile design was evaluated by comparing the predicted and measured load-settlement and load-transfer curves. In addition, the t-z method was used to perform probabilistic load-settlement analyses and obtain resistance factors applicable to the load and resistance factor design approach. ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000727 [article] Design methodology for axially loaded auger cast-in-place and drilled displacement piles [texte imprimé] / Sungwon Park, Auteur ; Lance A. Roberts, Auteur ; Anil Misra, Auteur . - 2013 . - pp. 1431–1441. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 12 (Décembre 2012) . - pp. 1431–1441 Mots-clés : Augered pile T-z method Service limit state design Strength LRFD Parameter correlations Résumé : With the increasing use of augered cast-in-place and drilled displacement piles in new construction, it is important that proper design parameters be incorporated when evaluating pile performance using reliability-based design methods. Although augered piles can be distinguished from bored piles, including drilled shafts, and driven piles by the magnitude of the effective stress changes they produce in the vicinity of the pile during construction, the current design methods for augered piles generally use the same design methods as those used for bored or driven piles. To enhance the efficiency of the augered piles, a unique design method must be developed. This paper focuses on developing a design methodology for axially loaded augered piles installed in predominately sandy soils using the t-z method. To develop the design parameters for augered piles, back-calculation of the t-z parameters was conducted using static load–test data. The data from 17 static pile load tests conducted on augered piles from construction sites were obtained. Load-settlement and load-transfer curve fittings were performed using the t-z model to back-calculate a set of soil-pile interfacial and tip parameters, along with their variability. Correlations of the back-calculated t-z model parameters with the standard field investigation data were conducted, and the most-promising correlations were incorporated into the t-z model–based design methodology. Subsequently, the t-z method for augered pile design was evaluated by comparing the predicted and measured load-settlement and load-transfer curves. In addition, the t-z method was used to perform probabilistic load-settlement analyses and obtain resistance factors applicable to the load and resistance factor design approach. ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000727

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire

Reliability-based design of deep foundations based on differential settlement criterion / Lance A. Roberts in Canadian geotechnical journal, Vol. 46 N° 2 (Fevrier 2009)  

Public ISBD [article]  inCanadian geotechnical journal > Vol. 46 N° 2 (Fevrier 2009) . - pp. 168–176 Titre : Reliability-based design of deep foundations based on differential settlement criterion Type de document : texte imprimé Auteurs : Lance A. Roberts, Auteur ; Anil Misra, Auteur Article en page(s) : pp. 168–176 Note générale : Sciences de la Terre Langues : Anglais (eng) Mots-clés : Deep foundations Probabilistic analysis Differential settlement “t–z” method Fondations profondes Analyse probabiliste Consolidation différentielle Méthode « t–z » Index. décimale : 550 Sciences auxiliaires de la géologie. Résumé : Load–displacement analysis of a single deep foundation element can be accomplished by utilizing a soil–structure interaction model, such as the “t–z” model. By combining the soil–structure interaction model with a probabilistic analysis technique, such as Monte Carlo simulation, methods to rationally incorporate variability in the model parameters can be developed. As a result, the service limit state load capacity of a single deep foundation element can be computed for an allowable total head displacement. However, in design, differential settlement between individual foundation elements is often the event of interest. This paper develops a reliability-based design methodology for deep foundations based on a differential settlement design criterion. The design methodology is developed for various levels of uncertainty in the model parameters. The results are presented in the form of cumulative distribution functions that, combined with the calculated service limit state load capacity, form the basis for serviceability design of deep foundations based on a differential settlement criterion. L’analyse de charge – déplacement d’un élément unique d’une fondation profonde peut être accomplie en utilisant un modèle d’interaction sol – structure tel que le modèle « t– z ». En combinant un modèle d’interaction sol – structure et une analyse probabiliste, comme la simulation Monte Carlo, des méthodes peuvent être développées qui intègrent la variabilité des paramètres du modèle. L’état-limite à l’utilisation en capacité portante pour un élément de fondation profonde peut être calculée pour un déplacement total alloué de la tête. Cependant, durant la conception, la consolidation différentielle entre les éléments individuels est souvent un aspect d’intérêt. Cet article développe une méthodologie de conception basée sur la fiabilité pour des fondations profondes à partir d’un critère de consolidation différentielle. La méthodologie de conception est développée pour différents niveaux d’incertitude des paramètres du modèle. Les résultats sont présentés sous forme de fonctions de distribution cumulatives qui, lorsque combinées avec l’état-limite à l’utilisation en capacité portante, constituent la base de la conception de fondations profondes selon un critère de consolidation différentielle. DEWEY : 550 ISSN : 0008-3674 En ligne : http://rparticle.web-p.cisti.nrc.ca/rparticle/AbstractTemplateServlet?calyLang=f [...] [article] Reliability-based design of deep foundations based on differential settlement criterion [texte imprimé] / Lance A. Roberts, Auteur ; Anil Misra, Auteur . - pp. 168–176. Sciences de la Terre Langues : Anglais (eng) in Canadian geotechnical journal > Vol. 46 N° 2 (Fevrier 2009) . - pp. 168–176 Mots-clés : Deep foundations Probabilistic analysis Differential settlement “t–z” method Fondations profondes Analyse probabiliste Consolidation différentielle Méthode « t–z » Index. décimale : 550 Sciences auxiliaires de la géologie. Résumé : Load–displacement analysis of a single deep foundation element can be accomplished by utilizing a soil–structure interaction model, such as the “t–z” model. By combining the soil–structure interaction model with a probabilistic analysis technique, such as Monte Carlo simulation, methods to rationally incorporate variability in the model parameters can be developed. As a result, the service limit state load capacity of a single deep foundation element can be computed for an allowable total head displacement. However, in design, differential settlement between individual foundation elements is often the event of interest. This paper develops a reliability-based design methodology for deep foundations based on a differential settlement design criterion. The design methodology is developed for various levels of uncertainty in the model parameters. The results are presented in the form of cumulative distribution functions that, combined with the calculated service limit state load capacity, form the basis for serviceability design of deep foundations based on a differential settlement criterion. L’analyse de charge – déplacement d’un élément unique d’une fondation profonde peut être accomplie en utilisant un modèle d’interaction sol – structure tel que le modèle « t– z ». En combinant un modèle d’interaction sol – structure et une analyse probabiliste, comme la simulation Monte Carlo, des méthodes peuvent être développées qui intègrent la variabilité des paramètres du modèle. L’état-limite à l’utilisation en capacité portante pour un élément de fondation profonde peut être calculée pour un déplacement total alloué de la tête. Cependant, durant la conception, la consolidation différentielle entre les éléments individuels est souvent un aspect d’intérêt. Cet article développe une méthodologie de conception basée sur la fiabilité pour des fondations profondes à partir d’un critère de consolidation différentielle. La méthodologie de conception est développée pour différents niveaux d’incertitude des paramètres du modèle. Les résultats sont présentés sous forme de fonctions de distribution cumulatives qui, lorsque combinées avec l’état-limite à l’utilisation en capacité portante, constituent la base de la conception de fondations profondes selon un critère de consolidation différentielle. DEWEY : 550 ISSN : 0008-3674 En ligne : http://rparticle.web-p.cisti.nrc.ca/rparticle/AbstractTemplateServlet?calyLang=f [...]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire