Characterization of Liquefaction Susceptibility of Sands by Means of Extreme Void Ratios and/or Void Ratio Range

Yılmaz, Yüksel; Mollamahmutoğlu, Murat

doi:10.1061/(asce)gt.1943-5606.0000164

Cited by 36 publications

(11 citation statements)

References 40 publications

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“…Figure 4 illustrates the variation of e max versus e min . It is clear from this figure that the correlation between the minimum and maximum void ratios of the sand-silt mixtures specimens is quite similar to that of Yilmaz and Mollamahmutoglu (2009) and Cubrinovski and Ishihara (2002).…”

Section: Description Of Materialssupporting

confidence: 65%

Laboratory Study on the Hydraulic Conductivity and Pore Pressure of Sand-Silt Mixtures

Belkhatir

Arab

Della

et al. 2014

Marine Georesources & Geotechnology

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The hydraulic conductivity plays a major role on the excess pore pressure generation during monotonic and cyclic loading of granular soils with fines. This paper aims to determine how much the hydraulic conductivity and pore pressure response of the sand-silt mixtures are affected by the percentage of fines and void ratio of the soil. The results of flexible wall permeameter and undrained monotonic triaxial tests performed on samples reconstituted from Chlef River sand with 0, 10, 20, 30, 40, and 50% nonplastic silt at an effective confining stress of 100 kPa and two relative densities (D r ¼ 20, and 91%) are presented and discussed. It was found that the pore pressure increases linearly with the increase of the fines content and logarithmically with the increase of the intergranular void ratio. The results obtained from this study reveal that the saturated hydraulic conductivity (k) of the sand mixed with 50% low plastic fines can be, on average, four orders of magnitude smaller than that of the clean sand. The results show also that the hydraulic conductivity decreases hyperbolically with the increase of the fines content and the intergranular void ratio.

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Section: Description Of Materialssupporting

confidence: 65%

Laboratory Study on the Hydraulic Conductivity and Pore Pressure of Sand-Silt Mixtures

Belkhatir

Arab

Della

et al. 2014

Marine Georesources & Geotechnology

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“…Figure 4b illustrates the variation of e max with e min . It is clear from Figure 4b that the correlation between the minimum and maximum void ratios of the sand-silt mixtures samples is quite similar to that of [38].…”

Section: Experimental Program 21 Index Properties Of Tested Materialssupporting

confidence: 52%

Influence of Soil Fabrics and Stress State on the Undrained Instability of Overconsolidated Binary Granular Assemblies

Mahmoudi

Taiba

Hazout

et al. 2018

Studia Geotechnica Et Mechanica

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The instability of saturated granular soils in field conditions generates drastic collapse in terms of runoff deformation because of its failing to sustain naturally applied loading conditions such as earthquakes, wave actions and vibrations. The objective of this laboratory investigation is to study the effects of the depositional methods, overconsolidation ratio (OCR) and confining pressure on the undrained instability shear strength of medium dense (Dr = 52%) sand–silt mixtures under static loading conditions. For this purpose, a series of undrained monotonic triaxial tests were carried out on reconstituted saturated silty sand samples with fines content ranging from 0% to 40%. Three confining pressures were used (P’c = 100, 200 and 300 kPa) in this research. The sand–silt mixture samples were prepared using two depositional methods, dry funnel pluviation (DFP) and wet deposition (WD), and subjected to two OCRs (1 and 2). The obtained instability lines and friction angles indicate that the funnel pluviated samples exhibit strain hardening compared to the wet deposited samples and that normally consolidated and overconsolidated wet deposited clean sandy samples were very sensitive to static liquefaction. The test results also indicate that the instability friction angle increases with the increase in the OCR expressing soil dilative character tendency increase. The instability friction angle decreases with the increase in the fines content for DFP and the inverse tendency was observed in the case of WD.

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“…A large number of earthquakes indicate that the liquefaction of saturated sand under the influence of earthquakes has caused great damage to pile foundations, embankments, slopes, and dams. Before the arrival of seismic loads, these structure foundations are often subjected to the initial shear stress due to the presence of upper structures [3,4]. At present, most of the tests mainly consider the state where the initial shear stress does not exist, that is to start the test based on the equal three-dimensional consolidation pressure.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Effects of Initial Shear Stress and Vibration Frequency on Dynamic Strength of Saturated Sands

Zhang

Cao²,

Huang

2019

Advances in Materials Science and Engineering

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The cyclic triaxial system is used to investigate the effects of confining pressure, initial shear stress, cyclic stress ratio, and vibration frequency on the dynamic strength characteristics of saturated sand in the Wenchuan area. Results show that when the vibration frequency is constant, the dynamic strength of sand increases with the increase of the consolidation ratio. However, when the consolidation ratio exceeds a certain value, the dynamic strength of sand decreases or increases slowly. The dynamic internal friction angle first increases and then decreases with the increase of consolidation ratio, and the dynamic internal friction angle under different initial shear stresses differs by a maximum of about 12%. When the failure cycles are constant, the dynamic strength and the dynamic internal friction angle of the sand increase with the increase of vibration frequency, and the dynamic internal friction angle at different frequencies differs by a maximum of about 7%. When the cyclic stress ratio is constant, the higher the vibration frequency, the greater the cycles required to achieve the failure. As the cyclic stress ratio decreases, the influence of the vibration frequency on the failure cycles is gradually reduced.

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Characterization of Liquefaction Susceptibility of Sands by Means of Extreme Void Ratios and/or Void Ratio Range

Cited by 36 publications

References 40 publications

Laboratory Study on the Hydraulic Conductivity and Pore Pressure of Sand-Silt Mixtures

Laboratory Study on the Hydraulic Conductivity and Pore Pressure of Sand-Silt Mixtures

Influence of Soil Fabrics and Stress State on the Undrained Instability of Overconsolidated Binary Granular Assemblies

Experimental Study on the Effects of Initial Shear Stress and Vibration Frequency on Dynamic Strength of Saturated Sands

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