Empirical Correlations: Drained Shear Strength for Slope Stability Analyses

AbstractEmpirical correlations provide estimates of parameter values for preliminary design, verification of laboratory shear test data, and confirmation of back-analysis of a failed slope. The empirical correlations presented herein use liquid limit, clay-size fraction, and effective normal stress...

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Bibliographic Details
Published in:Journal of geotechnical and geoenvironmental engineering 2013-06, Vol.139 (6), p.853-862
Main Authors: Stark, Timothy D, Hussain, Manzoor
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Computation methods. Tables. Charts
Correlation
Correlation analysis
Data points
Empirical analysis
Estimates
Exact sciences and technology
Geotechnics
Liquids
Mathematical analysis
Soil investigations. Testing
Soil mechanics. Rocks mechanics
Stresses
Structural analysis. Stresses
Technical Papers
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Summary:AbstractEmpirical correlations provide estimates of parameter values for preliminary design, verification of laboratory shear test data, and confirmation of back-analysis of a failed slope. The empirical correlations presented herein use liquid limit, clay-size fraction, and effective normal stress to capture the variability and stress-dependent nature of drained residual and fully softened strength envelopes. This paper describes the testing and analysis used to increase the number of data points in the existing correlations, expand the residual strength correlation to include an effective normal stress of 50 kPa, and develop correlations between values of liquid limit and clay-size fraction measured using sample processed through a No. 40 sieve (ASTM procedure) and values derived using ball-milled/disaggregated sample. In addition, equations are presented to express the empirical correlations used to develop a spreadsheet that estimates the residual and fully softened friction angles based on entered values of liquid limit and clay-size fraction.
ISSN:1090-0241
1943-5606
DOI:10.1061/(ASCE)GT.1943-5606.0000824