Instability and Static Liquefaction on Proportional Strain Paths for Sand at Low Stresses

Lancelot, Laurent; Shahrour, Isam; Mahmoud, Marwan Al

doi:10.1061/(asce)0733-9399(2004)130:11(1365)

Cited by 32 publications

(26 citation statements)

References 20 publications

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“…Moreover, the occurrence of strain softening was a necessary but not su‹cient condition for instability, and vice versa. Lancelot et al (2004) also observed pre-instability strain softening of loose sand.…”

Section: Introductionmentioning

confidence: 77%

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Effect of Dilatancy on Instability, Pre-Instability Strain Softening of Sand Along Proportional Strain Paths

Guo

2007

Soils and Foundations

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Section: Introductionmentioning

confidence: 77%

“…Ample details and discussions of the model can be found in a series of publications by Wan and Guo (1998, 2004. Figure 16 pertains to the behaviour of dense (e0＝0.60) Ottawa sand along a variety of proportional strain paths (-0.8 to ＋1.08) at an initial conˆning pressure of 100 kPa.…”

Section: A Simple Conceptual Modelmentioning

confidence: 99%

Effect of Dilatancy on Instability, Pre-Instability Strain Softening of Sand Along Proportional Strain Paths

Guo

2007

Soils and Foundations

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“…It arose from a thick series of Eocene sand layers that fill karst pockets on the western side of Vercors at Hostun (Drôme, France). Experimental results for this sand obtained at low confining pressures may be found in Lancelot et al (2004Lancelot et al ( , 2006.…”

Section: Methodsmentioning

confidence: 90%

Estudio en laboratorio sobre licuefacción de arena parcialmente saturada

2011

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This experimental study was designed to assess the effects of soil water saturation on the liquefaction of Hostun RF sand. Cyclic undrained triaxial tests were conducted at different soil saturation levels, as given by Skempton's coefficient, and liquefaction potential curves constructed for each value of this coefficient. Our findings indicate that a lower soil saturation level results in the increased resistance of the sand to liquefaction, in agreement with the tendency observed in other sands. In addition, the variation in sand resistance to liquefaction produced with Skempton's coefficient was found to be consistent with the semi-empirical relation proposed by Yang et al. (2004).Keywords: sand, partial saturation, liquefaction, Skempton's Coefficient, triaxial ResumenEste estudio experimental fue diseñado para comprobar los efectos de la saturación de agua en suelos bajo la licuefacción de arena RF Hostun. Tests cíclicos de tipo triaxial no drenado fueron elaborados a diferentes niveles de saturación del suelo, como se obtiene por el coeficiente de Skempton, y se obtuvieron curvas de potencial de licuefacción para cada uno de los valores de este coeficiente. Nuestros resultados indican que un nivel de saturación bajo de suelo durante el incremento de la resistencia de la arena a la licuefacción, estando de acuerdo con la tendencia observada en otras arenas. Por otro lado, se observó que la variación de la resistencia de las arenas a la licuefacción producida mediante el coeficiente de Skempton es consistente con la relación semiempírica propuesta por Yang et al. (2004).

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“…The occurrence of instability depends on the entire stress and strain history, and it may or may not be promoted as a function of stress increment direction together with the current kinematic constraints (see e.g. [13,14]). …”

Section: Failure Initiationmentioning

confidence: 99%

A laboratory investigation on an undisturbed silty sand from a slope prone to landsliding

2010

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A laboratory investigation is presented for undisturbed samples of a silty sand under saturated conditions. The soil was sampled from test pits south of Rüdlingen in North-East Switzerland, where a landslide triggering experiment was carried out on a steep forest slope. The aim of the work was to characterise the behaviour of the soil in triaxial tests, in the light of the possible failure mechanisms of the slope. Conventional drained and undrained triaxial tests were conducted to detect critical state conditions as well as peak shear strength as a function of confining pressure. Soil specimens were also exposed to stress paths simulating in situ water pressure increase to study the stress-strain response and to enhance the ability to predict failure conditions more accurately in the future. Possible unstable response along the stress paths analysed was investigated by means of second order work and strain acceleration. The results show that temporary unstable conditions may be encountered for this soil at stress ratios below ultimate failure and even below critical state line, depending on void ratio, drainage conditions and time dependent compressibility. A modified state parameter is explored as a potentially useful tool to discriminate conditions leading to eventual collapse.

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Instability and Static Liquefaction on Proportional Strain Paths for Sand at Low Stresses

Cited by 32 publications

References 20 publications

Effect of Dilatancy on Instability, Pre-Instability Strain Softening of Sand Along Proportional Strain Paths

Effect of Dilatancy on Instability, Pre-Instability Strain Softening of Sand Along Proportional Strain Paths

Estudio en laboratorio sobre licuefacción de arena parcialmente saturada

A laboratory investigation on an undisturbed silty sand from a slope prone to landsliding

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