R. Andrus*
This paper discusses two ratios involving penetration resistance and shear-wave velocity (VS) that have been proposed for quantifying the influence of microstructure in aged and cemented soils for liquefaction assessment. The first ratio is the small-strain shear modulus (Gmax) divided by the cone penetration test tip resistance (qc). Because Gmax/qc is dimensionless, it can be expressed as a ratio of measured VS divided by a function of qc with velocity units. The second ratio is the measured VS divided by an estimated VS from penetration resistance-VS relationships for relatively young sand deposits (MEVR). The advantages and limitations of both ratios are discussed. The influence of various fines content (ð¹ð¹ð¹ð¹) corrections on ðððð, penetration resistance-ðððð relationships, and a relationship between MEVR and the liquefaction cyclic resistance ratio correction factor for microstructure (ð¾ð¾ð·ð·ð·ð·) is evaluated using two published datasets. The results show the ð¹ ð¹ð¹ð¹ correction to ðððð is minimal in the range for which the correction was derived. The ð¹ð¹ð¹ð¹ corrections to qc and standard penetration test blow count are significant for silty soils, having a net effect of lowering the penetration resistance-ðððð relationships and increasing the slope of the ðððððððð-ð¾ð¾ð·ð·ð·ð· predictive relationship
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Published on 06/06/24Submitted on 06/06/24
Volume Advances in geotechnical site characterization, 2024DOI: 10.23967/isc.2024.156Licence: CC BY-NC-SA license
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