Les Inscriptions à la Bibliothèque sont ouvertes en
ligne via le site: https://biblio.enp.edu.dz
Les Réinscriptions se font à :
• La Bibliothèque Annexe pour les étudiants en
2ème Année CPST
• La Bibliothèque Centrale pour les étudiants en Spécialités
A partir de cette page vous pouvez :
| Retourner au premier écran avec les recherches... |
Détail de l'auteur
Auteur Sandra L. Houston
Documents disponibles écrits par cet auteur
Affiner la rechercheProtocol for the assessment of unsaturated soil properties in geotechnical engineering practice / Delwyn G. Fredlund in Canadian geotechnical journal, Vol. 46 N° 6 (Juin 2009)
in Canadian geotechnical journal > Vol. 46 N° 6 (Juin 2009) . - pp. 694–707
Titre : Protocol for the assessment of unsaturated soil properties in geotechnical engineering practice Type de document : texte imprimé Auteurs : Delwyn G. Fredlund, Auteur ; Sandra L. Houston, Auteur Article en page(s) : pp. 694–707 Note générale : Sciences de la Terre Langues : Anglais (eng) Mots-clés : Unsaturated soil mechanics Soil-water characteristic curves Unsaturated soil property functions Soil suction Engineering protocols Hierarchical levels Mécanique des sols non saturés Courbes caractéristiques sol-eau Fonctions des propriétés du sol non saturé Succion du sol Protocoles d’ingénierie Niveaux hiérarchique Index. décimale : 550 Sciences auxiliaires de la géologie. Résumé : The implementation of unsaturated soil mechanics into routine geotechnical engineering practice requires an evaluation of methodologies that may be used for the assessment of “unsaturated soil property functions.” Guidelines and recommendations need to be provided to practicing engineers. The guidelines need to take the form of “engineering protocols” that define acceptable standards for engineering practice. “Engineering protocols” for unsaturated soils engineering practice can be divided into “preliminary design” protocols and “final design” protocols. Both design levels involve the use of a variety of estimation procedures that have been proposed for various classes of geotechnical problems (e.g., unsaturated flow, shear strength, volume change, and distortion). The hierarchy in methodologies is based mainly on the costs and risks associated with a particular engineering project. In this paper, “hierarchical levels” are suggested that take into consideration the cost of various direct and indirect methodologies for the determination of unsaturated soil properties. Recommendations and suggestions are provided for methods for the determination and use of the soil-water characteristic curves (SWCC) and consequently, for the computation of unsaturated soil property functions (USPFs). Primary attention is given to estimation procedures best known to the authors and most appropriate for geotechnical engineering practice.
L’implémentation de la mécanique des sols non saturés dans la pratique de routine de la géotechnique implique une évaluation des méthodologies qui peuvent être utilisées pour la détermination des « fonctions des propriétés du sol non saturé ». Les ingénieurs praticiens doivent avoir accès aux lignes directrices et aux recommandations. Les lignes directrices doivent prendre la forme de « protocoles d’ingénierie » qui définissent les standards acceptables dans la pratique de l’ingénierie. Les protocoles d’ingénierie peuvent être divisés en protocoles de conception préliminaire et en protocoles de conception finale. Ces deux niveaux de conception impliquent l’utilisation d’une variété de procédures d’estimation qui ont été proposées pour différentes catégories de problèmes géotechniques (ex : écoulement non saturé, résistance au cisaillement, changement de volume et distorsion). La hiérarchie des méthodologies est basée principalement sur les coûts et les risques associés à un projet d’ingénierie spécifique. Dans cet article, des « niveaux hiérarchiques » sont suggérés qui tiennent compte des coûts de plusieurs méthodologies directes et indirectes servant à déterminer les propriétés des sols non saturés. Des recommandations et suggestions sont présentées à propos desméthodes de détermination et d’utilisation des courbes caractéristiques sol-eau « SWCC », ainsi que sur les calculs des fonctions des propriétés du sol non saturé « USPFs ». Une attention particulière est donnée aux procédures d’estimation les mieux connues par les auteurs et les plus appropriées pour la pratique de la géotechnique.
DEWEY : 550 ISSN : 0008-3674 En ligne : http://rparticle.web-p.cisti.nrc.ca/rparticle/AbstractTemplateServlet?calyLang=f [...] [article] Protocol for the assessment of unsaturated soil properties in geotechnical engineering practice [texte imprimé] / Delwyn G. Fredlund, Auteur ; Sandra L. Houston, Auteur . - pp. 694–707.
Sciences de la Terre
Langues : Anglais (eng)
in Canadian geotechnical journal > Vol. 46 N° 6 (Juin 2009) . - pp. 694–707
Mots-clés : Unsaturated soil mechanics Soil-water characteristic curves Unsaturated soil property functions Soil suction Engineering protocols Hierarchical levels Mécanique des sols non saturés Courbes caractéristiques sol-eau Fonctions des propriétés du sol non saturé Succion du sol Protocoles d’ingénierie Niveaux hiérarchique Index. décimale : 550 Sciences auxiliaires de la géologie. Résumé : The implementation of unsaturated soil mechanics into routine geotechnical engineering practice requires an evaluation of methodologies that may be used for the assessment of “unsaturated soil property functions.” Guidelines and recommendations need to be provided to practicing engineers. The guidelines need to take the form of “engineering protocols” that define acceptable standards for engineering practice. “Engineering protocols” for unsaturated soils engineering practice can be divided into “preliminary design” protocols and “final design” protocols. Both design levels involve the use of a variety of estimation procedures that have been proposed for various classes of geotechnical problems (e.g., unsaturated flow, shear strength, volume change, and distortion). The hierarchy in methodologies is based mainly on the costs and risks associated with a particular engineering project. In this paper, “hierarchical levels” are suggested that take into consideration the cost of various direct and indirect methodologies for the determination of unsaturated soil properties. Recommendations and suggestions are provided for methods for the determination and use of the soil-water characteristic curves (SWCC) and consequently, for the computation of unsaturated soil property functions (USPFs). Primary attention is given to estimation procedures best known to the authors and most appropriate for geotechnical engineering practice.
L’implémentation de la mécanique des sols non saturés dans la pratique de routine de la géotechnique implique une évaluation des méthodologies qui peuvent être utilisées pour la détermination des « fonctions des propriétés du sol non saturé ». Les ingénieurs praticiens doivent avoir accès aux lignes directrices et aux recommandations. Les lignes directrices doivent prendre la forme de « protocoles d’ingénierie » qui définissent les standards acceptables dans la pratique de l’ingénierie. Les protocoles d’ingénierie peuvent être divisés en protocoles de conception préliminaire et en protocoles de conception finale. Ces deux niveaux de conception impliquent l’utilisation d’une variété de procédures d’estimation qui ont été proposées pour différentes catégories de problèmes géotechniques (ex : écoulement non saturé, résistance au cisaillement, changement de volume et distorsion). La hiérarchie des méthodologies est basée principalement sur les coûts et les risques associés à un projet d’ingénierie spécifique. Dans cet article, des « niveaux hiérarchiques » sont suggérés qui tiennent compte des coûts de plusieurs méthodologies directes et indirectes servant à déterminer les propriétés des sols non saturés. Des recommandations et suggestions sont présentées à propos desméthodes de détermination et d’utilisation des courbes caractéristiques sol-eau « SWCC », ainsi que sur les calculs des fonctions des propriétés du sol non saturé « USPFs ». Une attention particulière est donnée aux procédures d’estimation les mieux connues par les auteurs et les plus appropriées pour la pratique de la géotechnique.
DEWEY : 550 ISSN : 0008-3674 En ligne : http://rparticle.web-p.cisti.nrc.ca/rparticle/AbstractTemplateServlet?calyLang=f [...]
in Journal of geotechnical and geoenvironmental engineering > Vol. 134 n°11 (Novembre 2008) . - pp. 1619–1632
Titre : Shear strength and shear-induced volume change behavior of unsaturated soils from a triaxial test program Type de document : texte imprimé Auteurs : Sandra L. Houston, Auteur ; Natalia Perez-Garcia, Auteur ; William N. Houston, Auteur Année de publication : 2009 Article en page(s) : pp. 1619–1632 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Shear strength Suction Volume change Unsaturated soils Triaxial tests Soil properties Résumé : A series of unsaturated soil triaxial tests were performed on four soils including sand, silt, and a low plasticity clay. Attempts were made to correlate unsaturated soil properties from these tests and data from the literature with soil-water characteristics curve (SWCC), soil gradation, and saturated soil properties. The feasibility of estimating unsaturated soil property functions from saturated soil properties, SWCCs and gradation data, is demonstrated. A hyperbolic model for estimation of the unsaturated soil parameter, ϕb , versus matric suction is presented. Shear induced volume change behavior was also studied, and results are included in this paper. Although not correlated with soil index properties, these shear-induced volume change data are important to complete stress-deformation analyses, and represent a significant addition to the existing data base of unsaturated soil properties. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A11%281 [...] [article] Shear strength and shear-induced volume change behavior of unsaturated soils from a triaxial test program [texte imprimé] / Sandra L. Houston, Auteur ; Natalia Perez-Garcia, Auteur ; William N. Houston, Auteur . - 2009 . - pp. 1619–1632.
Geotechnical and geoenvironmental engineering
Langues : Anglais (eng)
in Journal of geotechnical and geoenvironmental engineering > Vol. 134 n°11 (Novembre 2008) . - pp. 1619–1632
Mots-clés : Shear strength Suction Volume change Unsaturated soils Triaxial tests Soil properties Résumé : A series of unsaturated soil triaxial tests were performed on four soils including sand, silt, and a low plasticity clay. Attempts were made to correlate unsaturated soil properties from these tests and data from the literature with soil-water characteristics curve (SWCC), soil gradation, and saturated soil properties. The feasibility of estimating unsaturated soil property functions from saturated soil properties, SWCCs and gradation data, is demonstrated. A hyperbolic model for estimation of the unsaturated soil parameter, ϕb , versus matric suction is presented. Shear induced volume change behavior was also studied, and results are included in this paper. Although not correlated with soil index properties, these shear-induced volume change data are important to complete stress-deformation analyses, and represent a significant addition to the existing data base of unsaturated soil properties. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A11%281 [...]
in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 7 (Juillet 2010) . - pp. 963-974
Titre : Unsaturated infinite slope stability considering surface flux conditions Type de document : texte imprimé Auteurs : Quentin B. Travis, Auteur ; Sandra L. Houston, Auteur ; Fernando A. M. Marinho, Auteur Année de publication : 2010 Article en page(s) : pp. 963-974 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Cohesive soils Embankment stability Equilibrium Failures Landslides Limit equilibrium Pore pressure Pore water Pore-water pressure Slope stability Slopes Soil suction Stability Suction Unsaturated flow Unsaturated soils Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : A slope stability model is derived for an infinite slope subjected to unsaturated infiltration flow above a phreatic surface. Closed form steady state solutions are derived for the matric suction and degree of saturation profiles. Soil unit weight, consistent with the degree of saturation profile, is also directly calculated and introduced into the analyzes, resulting in closed-form solutions for typical soil parameters and an infinite series solution for arbitrary soil parameters. The solutions are coupled with the infinite slope stability equations to establish a fully realized safety factor function. In general, consideration of soil suction results in higher factor of safety. The increase in shear strength due to the inclusion of soil suction is analogous to making an addition to the cohesion, which, of course, increases the factor of safety against sliding. However, for cohesive soils, the results show lower safety factors for slip surfaces approaching the phreatic surface compared to those produced by common safety factor calculations. The lower factor of safety is due to the increased soil unit weight considered in the matric suction model but not usually accounted for in practice wherein the soil is treated as dry above the phreatic surface. The developed model is verified with a published case study, correctly predicting stability under dry conditions and correctly predicting failure for a particular storm.
DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i7/p963_s1?isAuthorized=no [article] Unsaturated infinite slope stability considering surface flux conditions [texte imprimé] / Quentin B. Travis, Auteur ; Sandra L. Houston, Auteur ; Fernando A. M. Marinho, Auteur . - 2010 . - pp. 963-974.
Géotechnique
Langues : Anglais (eng)
in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 7 (Juillet 2010) . - pp. 963-974
Mots-clés : Cohesive soils Embankment stability Equilibrium Failures Landslides Limit equilibrium Pore pressure Pore water Pore-water pressure Slope stability Slopes Soil suction Stability Suction Unsaturated flow Unsaturated soils Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : A slope stability model is derived for an infinite slope subjected to unsaturated infiltration flow above a phreatic surface. Closed form steady state solutions are derived for the matric suction and degree of saturation profiles. Soil unit weight, consistent with the degree of saturation profile, is also directly calculated and introduced into the analyzes, resulting in closed-form solutions for typical soil parameters and an infinite series solution for arbitrary soil parameters. The solutions are coupled with the infinite slope stability equations to establish a fully realized safety factor function. In general, consideration of soil suction results in higher factor of safety. The increase in shear strength due to the inclusion of soil suction is analogous to making an addition to the cohesion, which, of course, increases the factor of safety against sliding. However, for cohesive soils, the results show lower safety factors for slip surfaces approaching the phreatic surface compared to those produced by common safety factor calculations. The lower factor of safety is due to the increased soil unit weight considered in the matric suction model but not usually accounted for in practice wherein the soil is treated as dry above the phreatic surface. The developed model is verified with a published case study, correctly predicting stability under dry conditions and correctly predicting failure for a particular storm.
DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v136/i7/p963_s1?isAuthorized=no
