Documents disponibles écrits par cet auteur

Method for evaluation of depth of wetting in residential areas / Kenneth D. Walsh in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N°2 (Février 2009) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N°2 (Février 2009) . - pp. 169–176 Titre : Method for evaluation of depth of wetting in residential areas Type de document : texte imprimé Auteurs : Kenneth D. Walsh, Auteur ; Craig A. Colby, Auteur ; William N. Houston, Auteur Année de publication : 2009 Article en page(s) : pp. 169–176 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Expansive  soils  Subsurface  flow  Soil  suction  Unsaturated  soils  Residential  location  Colorado  Irrigation  Urban  areas Résumé : Field sampling was performed at a number of residential structures in the Denver metropolitan area for the purpose of assessing the extent of wetting below residential structures after construction and commencement of landscape irrigation. Total suction measurements using filter paper methods were undertaken on undisturbed samples. A similar data set from sites without previous development or irrigation was used to estimate the suction profile before the imposition of residential construction and landscape irrigation. Comparison of the postdevelopment profile measured at the residential structures to the predevelopment profile estimated using a site-specific procedure was used to assess the depth of wetting at each structure. Cumulative probability curves are presented for the depth of wetting arising from common residential landscape schemes and site drainage for the Denver area. The Denver-area data set was used to develop a method for assessment of depth of wetting. This method can be used to assess depth of wetting from residential development for other regions having different climatic conditions and landscape practices. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A2%2816 [...] [article] Method for evaluation of depth of wetting in residential areas [texte imprimé] / Kenneth D. Walsh, Auteur ; Craig A. Colby, Auteur ; William N. Houston, Auteur . - 2009 . - pp. 169–176. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N°2 (Février 2009) . - pp. 169–176 Mots-clés : Expansive  soils  Subsurface  flow  Soil  suction  Unsaturated  soils  Residential  location  Colorado  Irrigation  Urban  areas Résumé : Field sampling was performed at a number of residential structures in the Denver metropolitan area for the purpose of assessing the extent of wetting below residential structures after construction and commencement of landscape irrigation. Total suction measurements using filter paper methods were undertaken on undisturbed samples. A similar data set from sites without previous development or irrigation was used to estimate the suction profile before the imposition of residential construction and landscape irrigation. Comparison of the postdevelopment profile measured at the residential structures to the predevelopment profile estimated using a site-specific procedure was used to assess the depth of wetting at each structure. Cumulative probability curves are presented for the depth of wetting arising from common residential landscape schemes and site drainage for the Denver area. The Denver-area data set was used to develop a method for assessment of depth of wetting. This method can be used to assess depth of wetting from residential development for other regions having different climatic conditions and landscape practices. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282009%29135%3A2%2816 [...]

Shear strength and shear-induced volume change behavior of unsaturated soils from a triaxial test program / Sandra L. Houston in Journal of geotechnical and geoenvironmental engineering, Vol. 134 n°11 (Novembre 2008) 

Public ISBD [article]  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 [...]