Evaluation of Void Ratio of Sands with Various Amount of Fines On the Basis of Shear Wave Velocity Measurement

This paper presents the main results of a laboratory study of the use of shear wave velocity, Vs, to characterize hydraulically deposited tailings on the basis of density (void ratio), mean effective stress, and overconsolidation ratio. Tailings specimens from a gold mine in western Quebec were prepared in triaxial and oedometric cells in a manner that simulates hydraulic deposition. The specimens were consolidated isotropically and anisotropically (stress ratio, K of 0.38). Vs measurements were performed at each load increment using the piezoelectric ring-actuator technique (P-RAT). Correlations relating shear wave velocity to the void ratio, confining stress, and overconsolidation ratio of the tailings are presented. These laboratory correlations can be used for the characterization of the tailings by in situ Vs measurement. The application of these correlations to seismic cone penetration testing in an actual tailings impoundment is also presented.

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A torsional vibration device for shear wave velocity measurement of coarse grained soils

Measurement ◽

10.1016/j.measurement.2019.106972 ◽

2019 ◽

Vol 148 ◽

pp. 106972 ◽

Cited By ~ 1

Author(s):

Degao Zou ◽

Xingyang Liu ◽

Jingmao Liu ◽

Hao Zhang ◽

Chenguang Zhou ◽

...

Keyword(s):

Shear Wave ◽

Wave Velocity ◽

Shear Wave Velocity ◽

Torsional Vibration ◽

Velocity Measurement ◽

Coarse Grained

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Shear Wave Velocity Measurement in the Centrifuge Using Bender Elements

Geotechnical Testing Journal ◽

10.1520/gtj20130189 ◽

2014 ◽

Vol 37 (4) ◽

pp. 20130189 ◽

Cited By ~ 21

Author(s):

Waleed El-Sekelly ◽

Anthony Tessari ◽

Tarek Abdoun

Keyword(s):

Shear Wave ◽

Wave Velocity ◽

Shear Wave Velocity ◽

Velocity Measurement ◽

Bender Elements

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A New Shear Wave Velocity Measurement Technique in Ocean Bottom Soil Samples

10.4043/1794-ms ◽

1973 ◽

Cited By ~ 1

Author(s):

Barbaros Celikkol ◽

P.M. Vogel

Keyword(s):

Shear Wave ◽

Wave Velocity ◽

Measurement Technique ◽

Shear Wave Velocity ◽

Velocity Measurement ◽

Soil Samples ◽

Ocean Bottom ◽

Bottom Soil

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Estimating the undrained strength of sand: a theoretical framework

Canadian Geotechnical Journal ◽

10.1139/t95-082 ◽

1995 ◽

Vol 32 (5) ◽

pp. 859-870 ◽

Cited By ~ 44

Author(s):

Catherine E. Fear ◽

Peter K. Robertson

Keyword(s):

Shear Wave ◽

Wave Velocity ◽

Shear Wave Velocity ◽

Void Ratio ◽

Triaxial Compression ◽

State Parameter ◽

In Situ Tests ◽

Initial State ◽

Undrained Strength

A framework for estimating the ultimate undrained steady state shear strength of sand (Su) from in situ tests, which combines the theory of critical state soil mechanics with shear wave velocity measurements, is presented. For a particular direction of undrained loading, samples of a given sand at a constant void ratio will reach the same Su, despite the magnitude of the initial effective confining stresses. Unique Su/p′ or [Formula: see text] ratios for a given direction of loading exist for a particular sand only if state parameter is constant throughout the deposit. Normalized shear wave velocity, Vs1, can be correlated with void ratio and is therefore used to estimate Su for a given initial state and direction of loading. Strengths in triaxial compression are examined in this paper; however, the same framework can be used to estimate strengths under other directions of loading. The Su–Vs1 relationship is shown to be relatively sensitive and should be used more as a screening tool rather than an accurate means of predicting Su. Vs1 is converted to equivalent values of SPT (N1)60 and CPT qc1, and the results are compared with the current methods of estimating Su. Key words : in situ testing, liquefaction, sand, undrained strength.

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Development of global correlation models between in situ stress-normalized shear wave velocity and soil unit weight for plastic soils

Canadian Geotechnical Journal ◽

10.1139/cgj-2016-0015 ◽

2016 ◽

Vol 53 (10) ◽

pp. 1600-1611 ◽

Cited By ~ 13

Author(s):

Sung-Woo Moon ◽

Taeseo Ku

Keyword(s):

Shear Wave ◽

Wave Velocity ◽

Shear Wave Velocity ◽

Void Ratio ◽

Unit Weight ◽

Model Parameters ◽

Site Specific ◽

Global Correlation ◽

Soil Unit

Shear wave velocity (Vs) in geo-materials is strongly dependent on factors such as stress state, void ratio, and soil structure. Stress-dependency and void-ratio dependency can be represented by the equations [Formula: see text] and Vs = a(e)b (where α and a are material constants; exponents β and b represent the sensitivity of stress and the void dependent effect, respectively; [Formula: see text] is effective confining stress; e is void ratio), respectively. To consider the effect of soil disturbance and stress relief in geo-materials, shear wave velocity is often required to be normalized by adopting the site-specific model parameters (β or b). Based on a special in situ database compiled from 156 well-documented test sites that include various geo-materials, this study presents (i) the apparent relationships of the model parameters α and β for all soil and rock materials as well as a and b for all soil materials, (ii) new global correlations between soil unit weight and two types of stress-normalized shear wave velocities (Vs1 and Vsn), instead of the conventional Vs – soil unit weight relationship for clays, and (iii) the best-fitted multi-regression models between soil unit weight and site-specifically normalized shear wave velocity as well as the plasticity index for plastic soils. Moreover, this study presents the importance of site-specific stress normalization (Vsn) in creating a better correlation model. The proposed relationships offer first-order assessments of soil unit weight within the ranges of available data, which are also approximately guided by a hyperbolic unit weight model with depth.

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