Estimating fines content directly from CPTU data in saturated natural soils using the Ipzo parameter
Estimating fines content directly from CPTU data in saturated natural soils using the Ipzo parameter
The Ipzo parameter (Ramsey and Tho, 2024) enables Plasticity Index to be estimated directly from Piezocone Penetration Test (CPTU) data - and the potential of the Ipzo parameter for improving the reliability of other soil parameter estimates was noted by the authors. This paper utilizes the Ipzo parameter and empiricism - to estimate Fines Content (FC) directly from CPTU data. The reliability of the method has been assessed using a geographically and geologically diverse database extending over three continents, eleven marine sites, and more than fifty soil layers. The results suggest that FC estimates made using the new method are reasonably reliable and particularly useful for assessing layer changes. However, given its empirical nature, a 2-Step method is employed. In Step1 (Estimation), FC is estimated directly from CPTU data. In Step2 (Validation), measured FC values are compared with their complementary estimated values to assess the reliability of the estimates, and whether layer-specific or geotechnical unit-specific corrections factors are needed.
N. Ramsey; Kee Kiat Tho
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
2 - Site characterization, in-situ and laboratory testing, measurement
https://doi.org/10.53243/ISFOG2025-80
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