Strength and Deformation Characteristics of Saturated Sand at Extremely Low Pressures

Fukushima, Shinji; Tatsuoka, Fumio

doi:10.3208/sandf1972.24.4_30

Cited by 206 publications

(53 citation statements)

References 5 publications

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“…It 110 also seems probable that none of the test data reported by Leps (1970) were corrected for 111 membrane effects; it is now recognized that unless such a correction is made, angles of 112 shearing resistance at low confining stresses will be substantially overestimated. 113 Fukushima et al (1984) investigated the influence of membrane correction on data from tests 114 on sand at low confining stresses. They demonstrated that when membrane effects are 115 corrected for, the angle of effective shearing resistance does not increase indefinitely with 116 decreasing confining stress but plateaus (i.e., it reaches a peak value that does not increase 117 further) at a confining stress of approximately 50 kPa.…”

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Sleeper End Resistance of Ballasted Railway Tracks

Pen

Bhandari

Powrie

2014

J. Geotech. Geoenviron. Eng.

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This paper describes model tests carried out to investigate the contribution to the resistance to 11 the lateral movement of a railway sleeper attributable to the ballast shoulder, for a range of 12 shoulder widths and heights. During the tests, the deflection and resistance were measured 13 and photographs taken. Photographs were analyzed using a digital image correlation 14 technique to identify the zones of ballast surface disturbance, these demonstrate that a bulbed 15 failure volume is mobilized at the ultimate limit state. An idealised three dimensional failure 16 mechanism is proposed and resistances are calculated using the limit equilibrium approach. 17The calculation is found to provide a reliable estimate of the measured resistance. The work 18 identifies the optimum shoulder width and height. The calculations are extended to 19 demonstrate that when a number of sleepers are moved simultaneously the sleeper end 20 resistance may be 1/3 less per sleeper than that indicated in tests on an isolated sleeper. The 21 image analysis and limit equilibrium calculations show that this is due to the overlapping of 22 mobilized failure volumes from adjacent sleepers. 23

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“…Membrane effects were 120 corrected using the hoop stress method described by Fukushima et al (1984) and Henkel and 121 Gilbert, (1952 while the effect of the membrane is negligible at confining stresses in excess of 100 kPa. 128…”

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confidence: 99%

Sleeper End Resistance of Ballasted Railway Tracks

Pen

Bhandari

Powrie

2014

J. Geotech. Geoenviron. Eng.

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“…Il faut noter que ces auteurs utilisent des échantillons non antifrettés. En revanche, Fukushima et Tatsuoka (1984), sur échantillons antifrettés, trouvent globalement une dépendance beaucoup plus faible pour le sable de Toyoura, voire nulle pour des confine ments inférieurs à 20 kPa. On constate une dispersion importante pour les très faibles confinements.…”

Section: 2unclassified

“…Pour le sable d'Hostun dense, ψm ax varie donc de 43° pour 20kPa à 24° pour 600 pKa. Ces résultats obtenus par Furushima et Tatsuoka (1984) sur le sable de Toyoura et par Kolymbas et Wu (1990) Bolton (1986) a proposé pour les sables la corréla tion suivante entre ψm ax, la densité initiale du matériau ID et la passion moyenne effective à la rupture p':…”

Section: 3unclassified

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Comportement du sable d'Hostun sous faibles contraintes

1996

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Behavior of Hostun sand for small stresses AbstractTraxial tests on loose and dense Hostun RF sand were carried out for confining pressures ranging between 20 and 100 kPa. Stress-strain curves are presented for drained, undrained and proportionnal strain path tests. They can be used as a tool to identify the constants of constitutive models, and test them on non-conventionnal paths. A one-test determination of the failure curve is also presented, which shows that the internal angle of friction is very much pressure-dependent in the low stress range. The variations of the angle of friction as a function of confining pressure and mean stress at failure are compared to usual correlations and results found in the literature for others sands. The variations of dilatancy angle and deformation modulus with confining pressure are also presented. These results show that constants of constitutive models should be identified, and models tested, for the range of stress in which models are to be used.

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