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Effects of reinforcement on liquefaction resistance of solani sand / B. K. Maheshwari in Journal of geotechnical and geoenvironmental engineering, Vol. 138 N° 7 (Juillet 2012) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 7 (Juillet 2012) . - pp. 831–840 Titre : Effects of reinforcement on liquefaction resistance of solani sand Type de document : texte imprimé Auteurs : B. K. Maheshwari, Auteur ; H. P. Singh, Auteur ; Swami Saran, Auteur Année de publication : 2012 Article en page(s) : pp. 831–840 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Liquefaction  resistance  Solani  sand  Geogrids  Coir  fiber  Synthetic  fiber Résumé : A study on liquefaction resistance of Solani sand reinforced with geogrid sheet, geosynthetic fiber, and natural coir fiber is reported. Tests were carried out on shake table (vibration table) with sand samples prepared at a relative density of 25%, with and without reinforcements. Synthetic geogrid sheets were used in three different combinations of three, four, and five layers. In case of fibers, the percentage of fibers by weight of dry sand were taken as 0.25, 0.50, and 0.75% and mixed randomly with the sand sample. The liquefaction parameters, such as the maximum pore water pressure (Umax), maximum pore water pressure built-up time, stay time for Umax, and pore water pressure dissipation time were measured corresponding to various levels of accelerations varying from 0.1–0.4 g. The frequency of the dynamic load was kept constant at 5 Hz. The liquefaction resistance of sand was evaluated in terms of maximum pore water pressure ratio (rumax). Test results indicated that on inclusion of fibers and geogrid sheets into the sand samples, the rumax decreased. On increasing the fiber content and number of geogrid sheets, rumax decreased further, and this decrease is significant at a small amplitude of excitation. The average increase in liquefaction resistance of sand reinforced with synthetic and coir fibers was found to be 88 and 91%, respectively, for 0.75% fiber content, whereas for five layers of geogrid sheets, this increase was about 31% at 0.1 g acceleration. ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000645 [article] Effects of reinforcement on liquefaction resistance of solani sand [texte imprimé] / B. K. Maheshwari, Auteur ; H. P. Singh, Auteur ; Swami Saran, Auteur . - 2012 . - pp. 831–840. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 7 (Juillet 2012) . - pp. 831–840 Mots-clés : Liquefaction  resistance  Solani  sand  Geogrids  Coir  fiber  Synthetic  fiber Résumé : A study on liquefaction resistance of Solani sand reinforced with geogrid sheet, geosynthetic fiber, and natural coir fiber is reported. Tests were carried out on shake table (vibration table) with sand samples prepared at a relative density of 25%, with and without reinforcements. Synthetic geogrid sheets were used in three different combinations of three, four, and five layers. In case of fibers, the percentage of fibers by weight of dry sand were taken as 0.25, 0.50, and 0.75% and mixed randomly with the sand sample. The liquefaction parameters, such as the maximum pore water pressure (Umax), maximum pore water pressure built-up time, stay time for Umax, and pore water pressure dissipation time were measured corresponding to various levels of accelerations varying from 0.1–0.4 g. The frequency of the dynamic load was kept constant at 5 Hz. The liquefaction resistance of sand was evaluated in terms of maximum pore water pressure ratio (rumax). Test results indicated that on inclusion of fibers and geogrid sheets into the sand samples, the rumax decreased. On increasing the fiber content and number of geogrid sheets, rumax decreased further, and this decrease is significant at a small amplitude of excitation. The average increase in liquefaction resistance of sand reinforced with synthetic and coir fibers was found to be 88 and 91%, respectively, for 0.75% fiber content, whereas for five layers of geogrid sheets, this increase was about 31% at 0.1 g acceleration. ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000645