Stress Dependency of Shear-Wave Velocity Measurements in Soils

Ku, Taeseo; Subramanian, Sathya; Moon, Sung-Woo; Jung, Jongwon

doi:10.1061/(asce)gt.1943-5606.0001592

Cited by 23 publications

(12 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This approach is formulated based on stress-dependency of the shear wave velocity presented by Santamaria et al [24], Ku et al [23] and others. The CPT-V S and CPT-G 0 correlations for drained penetration were developed using a sand database that was compiled by Mayne [25].…”

Section: Discussionmentioning

confidence: 99%

“…Among several relationships between VS and effective stresses affecting on soils, this study focuses on the following relationship between VS and 'v [23], [24]:…”

Section: Stress Dependency Of the Shear Wave Velocitymentioning

confidence: 99%

“…Where the stress-dependency parameters αv and βv are interrelated as follows [23]: (9) β = 1.00 − 0.18 ln ( 1 / ) = 258.67 exp(−5.556 ) (10) Hence:…”

Section: Stress Dependency Of the Shear Wave Velocitymentioning

confidence: 99%

See 2 more Smart Citations

Correlating the Shear Wave Velocity with the Cone Penetration Test

Ahmed¹

2017

Proceedings of the 2nd World Congress on Civil, Structural, and Environmental Engineering

View full text Add to dashboard Cite

-The shear wave velocity VS is an essential parameter in various geotechnical analyses. It can be determined using laboratory testing of undisturbed samples, in-situ geophysical measurements, or by using correlations of the shear wave velocity with the common in-situ penetration tests such as the standard penetration tests (SPT) and the cone penetration test (CPT). The latter approach is often preferred by engineers for many reasons including cost optimization of the geotechnical investigations and infeasibility of undisturbed sampling in some formations such as non-cohesive soils. Accordingly, many correlations were envisaged to determine the shear wave velocity using the CPT; these correlations were developed through statistical and regression analyses of compiled CPT and shear wave velocity databases. Yet, to date, substantial discrepancies between the existing CPT correlations and the measured shear wave velocities are still revealed when the CPT correlations are compared with more recent case histories and databases. As such, there is a continuous need to update these correlations. In this study, a proposed approach is presented to define the stress-dependency parameters of the shear wave velocity in terms of the CPT measurements. Hence, enhanced CPT correlations for the shear wave velocity and the small strain modulus in both cohesionless and cohesive soils are realised. Two case studies are analysed using the proposed CPT correlation for the shear wave velocity as well as the commonly applied correlations. It is shown that the proposed CPT-VS correlation provides consistent predictions with the measured shear wave velocity; hence, it may be considered as an enhancement to the currently adopted methods.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Among several relationships between VS and effective stresses affecting on soils, this study focuses on the following relationship between VS and 'v [23], [24]:…”

Section: Stress Dependency Of the Shear Wave Velocitymentioning

confidence: 99%

See 1 more Smart Citation

Correlating the Shear Wave Velocity with the Cone Penetration Test

Ahmed¹

2017

Proceedings of the 2nd World Congress on Civil, Structural, and Environmental Engineering

View full text Add to dashboard Cite

show abstract

“…The parameters  a and b are the site-specific parameters. The site-specific parameters  and a are related to  and b, respectively, as follows [7], [8]:…”

Section: Formulationmentioning

confidence: 99%

“…Eq. (3) represents the stress dependency of the shear wave velocity for lab tests in geomaterials [7]. Eq.…”

Section: Formulationmentioning

confidence: 99%

Prediction of Shear Wave Velocities in Soft to Firm Clays using Consolidation Tests

Ahmed¹

2018

World Congress on Civil, Structural, and Environmental Engineering

View full text Add to dashboard Cite

The consolidation test is one of the most common laboratory tests in geotechnical investigations. It is mainly utilized to assess the clay operative constrained modulus, which is an essential parameter in the settlement calculations of foundations and embankments. Recently, the non-linear numerical modelling has become more common than ever in geotechnical engineering. The state-of-art advanced geotechnical analyses focus on consideration of the nonlinear variation of soil moduli with the stress and strain levels. One of the fundamental quantities in advanced non-linear geotechnical analyses is the small strain shear modulus. It is obtained by measuring the shear wave velocity using special tests or amendments to traditional tests. Such tests and/or amendments are generally much less common and more expensive than consolidation tests. In this paper, the shear wave velocity and small strain shear modulus of soft to firm clays are evaluated from results of consolidation tests. The site-specific constants that relate the void ratio to the in-situ shear wave velocity is attained from the undisturbed virgin compression curve acquired from a consolidation test. The in-situ shear wave velocities and small strain shear moduli are concluded from the water content measurements. The proposed approach is validated by analysing two well-reported case studies; namely Ariake and Singapore clays. The results of the analyses show the viability of the proposed approach as the estimated moduli compare favourably with the values inferred from the field measurements.

show abstract

Variability of overconsolidated soils from Poland in geotechnical practice

Bogusz

Witowski

2018

ce papers

View full text Add to dashboard Cite

The advantages of establishing databases of soil parameters are recognized within the geotechnical community. Especially, statistical description of soils is necessary tool for establishing probability distribution functions used in reliability based design framework and in standard deterministic approach of limit state design; previous knowledge, comparable experience, and engineering judgement, all play a major role in the selection process of characteristic values of most essential parameters. This is often done in face of limited amount of data from site investigation. The paper presents preliminary database compilation attempt for some parameters of overconsolidated glacial tills and clays from Poland. Due to a rapid growth of infrastructure and cities, analysis of already gathered data is essential for providing engineers with guidance on the variability of soil conditions, which is most noticeable in the case of fine‐grained overconsolidated strata. Focus is given to parameters obtained from triaxial laboratory tests, including small‐strain shear stiffness obtained from Bender Element Test.

show abstract

Stress Dependency of Shear-Wave Velocity Measurements in Soils

Cited by 23 publications

References 25 publications

Correlating the Shear Wave Velocity with the Cone Penetration Test

Correlating the Shear Wave Velocity with the Cone Penetration Test

Prediction of Shear Wave Velocities in Soft to Firm Clays using Consolidation Tests

Variability of overconsolidated soils from Poland in geotechnical practice

Contact Info

Product

Resources

About