Documents disponibles écrits par cet auteur

Loose fill slope stabilization with soil nails / J. Li in Journal of geotechnical and geoenvironmental engineering, Vol. 134 N°3 (Mars 2008) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 134 N°3 (Mars 2008) . - pp. 277–288 Titre : Loose fill slope stabilization with soil nails : full-scale test Type de document : texte imprimé Auteurs : J. Li, Auteur ; L. G. Tham, Auteur ; S. M. Junaideen, Auteur Année de publication : 2008 Article en page(s) : pp. 277–288 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Field  tests  Slope  stability  Fills  Rainfall Résumé : Soil nailing is commonly used for stabilizing cut slopes and retaining structures. The technique is, however, seldom used in stabilizing old loose fill slopes that were not constructed to the current standards. There is a concern that soil-nailed loose fill slopes may not render safety during heavy rainstorms. Little work has been carried out to investigate the behavior of soil-nailed loose fill slopes. This paper presents a comprehensive field test on a loose fill slope that was constructed by end tipping without any compaction—in the same way old fill slopes were formed. The slope was 4.75m high, 9m wide, and 33deg to the horizontal. Two rows of five grouted nails were installed at a grid of 1.5m×1.5m at an inclination of 20deg from the horizontal. A surface grillage was used to connect the six nails in the middle of the grid. Performance of the nailed slope was monitored with various instruments for about six months until the slope was tested to fail by surcharging and wetting. The overall results show that soil nailing with a surface grillage is a potentially effective way to enhance the stability of old fill slopes. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A3%2827 [...] [article] Loose fill slope stabilization with soil nails : full-scale test [texte imprimé] / J. Li, Auteur ; L. G. Tham, Auteur ; S. M. Junaideen, Auteur . - 2008 . - pp. 277–288. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 134 N°3 (Mars 2008) . - pp. 277–288 Mots-clés : Field  tests  Slope  stability  Fills  Rainfall Résumé : Soil nailing is commonly used for stabilizing cut slopes and retaining structures. The technique is, however, seldom used in stabilizing old loose fill slopes that were not constructed to the current standards. There is a concern that soil-nailed loose fill slopes may not render safety during heavy rainstorms. Little work has been carried out to investigate the behavior of soil-nailed loose fill slopes. This paper presents a comprehensive field test on a loose fill slope that was constructed by end tipping without any compaction—in the same way old fill slopes were formed. The slope was 4.75m high, 9m wide, and 33deg to the horizontal. Two rows of five grouted nails were installed at a grid of 1.5m×1.5m at an inclination of 20deg from the horizontal. A surface grillage was used to connect the six nails in the middle of the grid. Performance of the nailed slope was monitored with various instruments for about six months until the slope was tested to fail by surcharging and wetting. The overall results show that soil nailing with a surface grillage is a potentially effective way to enhance the stability of old fill slopes. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A3%2827 [...]

A stochastic analysis of the effect of magnetic field on the pitting corrosion susceptibility of pure magnesium / J. Li in Materials and corrosion, Vol. 61 N° 4 (Avril 2010) 

Public ISBD [article]  in Materials and corrosion > Vol. 61 N° 4 (Avril 2010) . - pp. 306–312 Titre : A stochastic analysis of the effect of magnetic field on the pitting corrosion susceptibility of pure magnesium Type de document : texte imprimé Auteurs : J. Li, Auteur ; T. Zhang, Auteur ; Y. Shao, Auteur Année de publication : 2010 Article en page(s) : pp. 306–312 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Magnesium;  magnetic  field;  pitting  corrosion;  potentiostatic;  stochastic  analysis Résumé : The effect of magnetic field on the pitting corrosion susceptibility of pure magnesium was investigated by stochastic approaches. Stochastic models had been applied to simulate pitting corrosion as the combination of two physical processes: pit initiation and pit growth. The results revealed that magnetic field increased the pitting corrosion susceptibility of pure magnesium. For the pit initiation process, the presence of magnetic field changed the mechanism of pit initiation from the parallel birth and death stochastic model (B1) to the parallel birth stochastic model (A3). Magnetic field increased the pit generation rate λ while decreased the repassivation rate µ, which indicated that magnetic field accelerated the pit initiation process of pure magnesium. For the pit growth process, magnetic field didn't change the pit growth mechanism, but it could decrease the ability of repassivation of pitting corrosion resulting in a great probability for the stable pitting corrosion to grow up with a higher growth rate and finally develop into larger pit cavity. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905290/abstract [article] A stochastic analysis of the effect of magnetic field on the pitting corrosion susceptibility of pure magnesium [texte imprimé] / J. Li, Auteur ; T. Zhang, Auteur ; Y. Shao, Auteur . - 2010 . - pp. 306–312. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 61 N° 4 (Avril 2010) . - pp. 306–312 Mots-clés : Magnesium;  magnetic  field;  pitting  corrosion;  potentiostatic;  stochastic  analysis Résumé : The effect of magnetic field on the pitting corrosion susceptibility of pure magnesium was investigated by stochastic approaches. Stochastic models had been applied to simulate pitting corrosion as the combination of two physical processes: pit initiation and pit growth. The results revealed that magnetic field increased the pitting corrosion susceptibility of pure magnesium. For the pit initiation process, the presence of magnetic field changed the mechanism of pit initiation from the parallel birth and death stochastic model (B1) to the parallel birth stochastic model (A3). Magnetic field increased the pit generation rate λ while decreased the repassivation rate µ, which indicated that magnetic field accelerated the pit initiation process of pure magnesium. For the pit growth process, magnetic field didn't change the pit growth mechanism, but it could decrease the ability of repassivation of pitting corrosion resulting in a great probability for the stable pitting corrosion to grow up with a higher growth rate and finally develop into larger pit cavity. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905290/abstract