Abstract
This paper presents the results of a laboratory investigation into the effect of non-plastic fines on the correlation between liquefaction resistance and the shear wave velocity of sand. For this purpose, undrained stress-controlled cyclic triaxial and bender element tests were performed on clean sand and its mixtures with non-plastic silt. It is shown that the correlation between liquefaction resistance and shear wave velocity depends on fines content and confining effective stress. Based on the test results, correlation curves between field liquefaction resistance and overburden stress corrected shear wave velocity for sand containing various contents of fines are derived. These curves are compared to other previously proposed by field and laboratory studies.
Highlights
The velocity of shear wave propagation, Vs, is a key soil property, used for soil characterisation, such as the estimation of small-strain shear modulus, liquefaction resistance, seismic response, and assessment of the effectiveness of soil improvement methods used in soils, identification of transportation of pollutants in soils, as well as others.Liquefaction of sandy soils under cyclic loading conditions is considered one of the major causes of damage to earth structures and foundations
Liquefaction resistance is evaluated from laboratory tests such as cyclic simple shear, cyclic triaxial, and cyclic torsional shear, on undisturbed or reconstituted samples and by field tests
Semi-empirical field-based procedures for evaluating the liquefaction potential during earthquakes are based on correlations between field behaviour and in-situ index tests, such as standard penetration test (SPT), cone penetration test (CPT), Becker penetration test (BPT), and shear wave velocity (Vs)
Summary
The velocity of shear wave propagation, Vs , is a key soil property, used for soil characterisation, such as the estimation of small-strain shear modulus, liquefaction resistance, seismic response, and assessment of the effectiveness of soil improvement methods used in soils, identification of transportation of pollutants in soils, as well as others. Liquefaction of sandy soils under cyclic loading conditions is considered one of the major causes of damage to earth structures and foundations. Liquefaction resistance is evaluated from laboratory tests such as cyclic simple shear, cyclic triaxial, and cyclic torsional shear, on undisturbed or reconstituted samples and by field tests. Semi-empirical field-based procedures for evaluating the liquefaction potential during earthquakes are based on correlations between field behaviour and in-situ index tests, such as standard penetration test (SPT), cone penetration test (CPT), Becker penetration test (BPT), and shear wave velocity (Vs). Seed et al (1971) [1]
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