The determination of undrained shear strength and plasticity properties from quasi-static penetration tests

The liquid and plastic limits for a variety of natural and artificial soils covering a wide range of plasticity, as determined by the Casagrande method and the fall cone test and based on a strength criterion, were compared. To check the validity of the strength criterion, the undrained shear strength of these soils has been determined with a laboratory vane over the water content range between these limits. A limited comparison of the undrained strength values obtained from the vane test and fall cone test is also given. Key words: Atterberg limits, consistency, fall cone, laboratory vane, shear strength.

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Determination of Undrained Shear Strength of Low Plasticity Clays

Advanced Triaxial Testing of Soil and Rock ◽

10.1520/stp29092s ◽

2009 ◽

pp. 460-460-15 ◽

Cited By ~ 2

Author(s):

JF Peters

Keyword(s):

Shear Strength ◽

Undrained Shear Strength ◽

Undrained Shear

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The use of dilatometer test for the determination of undrained shear strength in organic soils

Annals of Warsaw University of Life Sciences – SGGW Land Reclamation ◽

10.2478/v10060-008-0041-2 ◽

2008 ◽

Vol 40 (1) ◽

pp. 97-105

Author(s):

Simon Rabarijoely

Keyword(s):

Shear Strength ◽

Undrained Shear Strength ◽

Organic Soils ◽

Engineering Practice ◽

Empirical Correlations ◽

Empirical Formulas ◽

Geotechnical Design ◽

Design Calculations ◽

Undrained Shear

The use of dilatometer test for the determination of undrained shear strength in organic soils The use of dilatometer test for the determination of undrained shear strength in organic soils. In engineering practice the empirical correlations or charts are often use to determine soil properties for design calculations. The DMT tests results are analysed on the basis of the empirical formulas proposed by Marchetti (1980). In this paper the new chart to determine the τfu of organic mud was proposed. The chart presents the relationships between dilatometer readings (p0 - u0), (p1 - u0), σ'v0 and τfu. The chart will be helpful in geotechnical design of embankments constructed on organic subsoil.

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CPT-Based Probabilistic Characterization of Undrained Shear Strength of Clay

Advances in Civil Engineering ◽

10.1155/2020/9617698 ◽

2020 ◽

Vol 2020 ◽

pp. 1-15

Author(s):

Mi Tian ◽

Xiaotao Sheng

Keyword(s):

Shear Strength ◽

Correlation Function ◽

Random Field ◽

Site Investigation ◽

Undrained Shear Strength ◽

Bayesian Approaches ◽

Probabilistic Characterization ◽

Undrained Shear

Applying random field theory involves two important issues: the statistical homogeneity (or stationarity) and determination of random field parameters and correlation function. However, the profiles of soil properties are typically assumed to be statistically homogeneous or stationary without rigorous statistical verification. It is also a challenging task to simultaneously determine random field parameters and the correlation function due to a limited amount of direct test data and various uncertainties (e.g., transformation uncertainties) arising during site investigation. This paper presents Bayesian approaches for probabilistic characterization of undrained shear strength using cone penetration test (CPT) data and prior information. Homogeneous soil units are first identified using CPT data and subsequently assessed for weak stationarity by the modified Bartlett test to reject the null hypothesis of stationarity. Then, Bayesian approaches are developed to determine the random field parameters and simultaneously select the most probable correlation function among a pool of candidate correlation functions within the identified statistically homogeneous layers. The proposed approaches are illustrated using CPT data at a clay site in Shanghai, China. It is shown that Bayesian approaches provide a rational tool for proper determination of random field model for probabilistic characterization of undrained shear strength with consideration of transformation uncertainty.

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