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Active earth pressure on retaining wall for c-ϕ soil backfill under seismic loading condition / Sanjay Kumar Shukla in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N° 5 (Mai 2009) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 5 (Mai 2009) . - pp. 690–696 Titre : Active earth pressure on retaining wall for c-ϕ soil backfill under seismic loading condition Type de document : texte imprimé Auteurs : Sanjay Kumar Shukla, Auteur ; Shrawan Kumar Gupta, Auteur ; Nagaratnam Sivakugan, Auteur Année de publication : 2009 Article en page(s) : pp. 690–696 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Backfills  Earth  pressure  Earthquakes  Retaining  walls  Seismic  loads Résumé : This technical note describes the derivation of an analytical expression for the total active force on the retaining wall for c-ϕ soil backfill considering both the horizontal and vertical seismic coefficients. The results based on this expression are compared with those obtained from earlier analytical expressions for the active force for c-ϕ soil backfill under seismic conditions, and found to have a similar trend of variation. The parametric study shows that the inclination of the critical failure plane with the horizontal plane decreases with the increase in values of seismic coefficients; the decrease being more for their higher values. The total active force increases with the increase in value of horizontal seismic coefficient; while it decreases with the increase in value of vertical seismic coefficient except for a very high value of horizontal seismic coefficient. Design charts are presented for various combinations of horizontal and vertical seismic coefficients ( kh and kv ), and values of cohesion and angle of shearing resistance for estimating the total active force on the retaining wall for c-ϕ soil backfill for practical applications. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000003 [article] Active earth pressure on retaining wall for c-ϕ soil backfill under seismic loading condition [texte imprimé] / Sanjay Kumar Shukla, Auteur ; Shrawan Kumar Gupta, Auteur ; Nagaratnam Sivakugan, Auteur . - 2009 . - pp. 690–696. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 5 (Mai 2009) . - pp. 690–696 Mots-clés : Backfills  Earth  pressure  Earthquakes  Retaining  walls  Seismic  loads Résumé : This technical note describes the derivation of an analytical expression for the total active force on the retaining wall for c-ϕ soil backfill considering both the horizontal and vertical seismic coefficients. The results based on this expression are compared with those obtained from earlier analytical expressions for the active force for c-ϕ soil backfill under seismic conditions, and found to have a similar trend of variation. The parametric study shows that the inclination of the critical failure plane with the horizontal plane decreases with the increase in values of seismic coefficients; the decrease being more for their higher values. The total active force increases with the increase in value of horizontal seismic coefficient; while it decreases with the increase in value of vertical seismic coefficient except for a very high value of horizontal seismic coefficient. Design charts are presented for various combinations of horizontal and vertical seismic coefficients ( kh and kv ), and values of cohesion and angle of shearing resistance for estimating the total active force on the retaining wall for c-ϕ soil backfill for practical applications. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000003

Vertical and radial consolidation analysis of multilayered soil using the spectral method / Rohan Walker in Journal of geotechnical and geoenvironmental engineering, Vol. 135 N° 5 (Mai 2009) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 5 (Mai 2009) . - pp. 657–663 Titre : Vertical and radial consolidation analysis of multilayered soil using the spectral method Type de document : texte imprimé Auteurs : Rohan Walker, Auteur ; Buddhima Indraratna, Auteur ; Nagaratnam Sivakugan, Auteur Année de publication : 2009 Article en page(s) : pp. 657–663 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Clays  Soil  consolidation  Drainage  Soil  stabilization Résumé : A new, easy to implement, solution to the consolidation of multilayered soil based on the spectral method is presented. Combined vertical and radial drainage under instantaneous or single ramp loading is considered, ignoring well resistance. Flow in the vertical direction is based on the average hydraulic gradient at a particular depth which allows smear effects to be included. The excess pore-water pressure profile across all soil layers is described by a single expression calculated with common matrix operations. Average excess pore pressures within or across any number of layers are easily calculated from the single expression. The new model is verified against other solutions from the current literature indicating that the more general spectral method model can replace the separate solutions developed for specific problems. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000075 [article] Vertical and radial consolidation analysis of multilayered soil using the spectral method [texte imprimé] / Rohan Walker, Auteur ; Buddhima Indraratna, Auteur ; Nagaratnam Sivakugan, Auteur . - 2009 . - pp. 657–663. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 135 N° 5 (Mai 2009) . - pp. 657–663 Mots-clés : Clays  Soil  consolidation  Drainage  Soil  stabilization Résumé : A new, easy to implement, solution to the consolidation of multilayered soil based on the spectral method is presented. Combined vertical and radial drainage under instantaneous or single ramp loading is considered, ignoring well resistance. Flow in the vertical direction is based on the average hydraulic gradient at a particular depth which allows smear effects to be included. The excess pore-water pressure profile across all soil layers is described by a single expression calculated with common matrix operations. Average excess pore pressures within or across any number of layers are easily calculated from the single expression. The new model is verified against other solutions from the current literature indicating that the more general spectral method model can replace the separate solutions developed for specific problems. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000075