Documents disponibles écrits par cet auteur

Stability of granite drystone masonry retaining walls / L. R. Alejano in Géotechnique, Vol. 62 N° 11 (Novembre 2012) 

Public ISBD [article]  in Géotechnique > Vol. 62 N° 11 (Novembre 2012) . - pp. 1013 –1025 Titre : Stability of granite drystone masonry retaining walls : I. Analytical design Type de document : texte imprimé Auteurs : L. R. Alejano, Auteur ; M. Veiga, Auteur ; J. Taboada, Auteur Année de publication : 2012 Article en page(s) : pp. 1013 –1025 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Limit  equilibrium  methods  Design  Retaining  walls Résumé : A limit-equilibrium-based technique is proposed for the design and analysis of drystone masonry retaining walls, focusing particularly on granite walls as traditionally constructed in Galicia in northwest Spain. To date, walls have typically been designed on the basis of past experience and rigid wall approaches. The method presented analyses wall stability, at different heights associated with block rows, against sliding and against two overturning mechanisms. As a result, design widths are obtained for different wall depths. The method can also be applied to estimates of the stability of existing walls with known dimensions and properties. The analytical method was applied experimentally to the design of a 20 m high wall. A sensitivity analysis of the design was also performed, with results presented in the form of a spider diagram. Estimates of the most relevant parameters for this type of design and some back-analyses to assess the technique are addressed in an accompanying paper. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.10.P.112 [article] Stability of granite drystone masonry retaining walls : I. Analytical design [texte imprimé] / L. R. Alejano, Auteur ; M. Veiga, Auteur ; J. Taboada, Auteur . - 2012 . - pp. 1013 –1025. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 62 N° 11 (Novembre 2012) . - pp. 1013 –1025 Mots-clés : Limit  equilibrium  methods  Design  Retaining  walls Résumé : A limit-equilibrium-based technique is proposed for the design and analysis of drystone masonry retaining walls, focusing particularly on granite walls as traditionally constructed in Galicia in northwest Spain. To date, walls have typically been designed on the basis of past experience and rigid wall approaches. The method presented analyses wall stability, at different heights associated with block rows, against sliding and against two overturning mechanisms. As a result, design widths are obtained for different wall depths. The method can also be applied to estimates of the stability of existing walls with known dimensions and properties. The analytical method was applied experimentally to the design of a 20 m high wall. A sensitivity analysis of the design was also performed, with results presented in the form of a spider diagram. Estimates of the most relevant parameters for this type of design and some back-analyses to assess the technique are addressed in an accompanying paper. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.10.P.112

Stability of granite drystone masonry retaining walls / L. R. Alejano in Géotechnique, Vol. 62 N° 11 (Novembre 2012) 

Public ISBD [article]  in Géotechnique > Vol. 62 N° 11 (Novembre 2012) . - pp. 1027 –1040 Titre : Stability of granite drystone masonry retaining walls : II. Relevant parameters and analytical and numerical studies of real walls Type de document : texte imprimé Auteurs : L. R. Alejano, Auteur ; M. Veiga, Auteur ; I. Gomez-Marquez, Auteur Année de publication : 2012 Article en page(s) : pp. 1027 –1040 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Numerical  modelling  Retaining  walls  Failure Résumé : This paper applies the analytical limit-equilibrium technique described in the accompanying Part I of this article to the design of granite drystone masonry retaining walls. Particular attention has been paid to estimating relevant parameters for the materials used. The friction angle between the stone blocks was studied by means of full-scale tests, and an empirical method was used to estimate the backfill strength properties. The dip of the base of the part of the wall tending to overturn was also studied. The technique was tested by back-analysing three wall failures, and was compared with numerical results from the UDEC code, suggested as an appropriate approach for assessing analytical results. Analytical factor of safety results for the design of a 20 m-high wall compared well with the numerical approach used in combination with the shear strength reduction technique. The results confirm the suitability of the limit-equilibrium approach for analysing these traditional, cost-effective and environmentally friendly structures. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.10.P.113 [article] Stability of granite drystone masonry retaining walls : II. Relevant parameters and analytical and numerical studies of real walls [texte imprimé] / L. R. Alejano, Auteur ; M. Veiga, Auteur ; I. Gomez-Marquez, Auteur . - 2012 . - pp. 1027 –1040. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 62 N° 11 (Novembre 2012) . - pp. 1027 –1040 Mots-clés : Numerical  modelling  Retaining  walls  Failure Résumé : This paper applies the analytical limit-equilibrium technique described in the accompanying Part I of this article to the design of granite drystone masonry retaining walls. Particular attention has been paid to estimating relevant parameters for the materials used. The friction angle between the stone blocks was studied by means of full-scale tests, and an empirical method was used to estimate the backfill strength properties. The dip of the base of the part of the wall tending to overturn was also studied. The technique was tested by back-analysing three wall failures, and was compared with numerical results from the UDEC code, suggested as an appropriate approach for assessing analytical results. Analytical factor of safety results for the design of a 20 m-high wall compared well with the numerical approach used in combination with the shear strength reduction technique. The results confirm the suitability of the limit-equilibrium approach for analysing these traditional, cost-effective and environmentally friendly structures. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.10.P.113