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Sand state parameter from CPT
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DOI：10.1139/cgj-2024-0076.png)
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A cone penetration test (CPT)-based procedure is proposed to determine the in situ density and state parameter (psi) of cohesionless soils. To date several correlations have been developed to estimate psi from CPT results, but most correlations are based on limited calibration testing and/or require soil constitutive parameters from laboratory shear tests. The new framework is based on a limit pressure calculated using cavity expansion theory and a semi closed-form solution that is scaled to existing calibration chamber data using a chamber shape factor. This enables estimation of psi directly from CPT results, which makes it practical and theoretically sound. This facilitates determining psi for use in flow failure assessment procedures for dams and embankments.
Keyword:
state parameter
cone penetration testing
cavity expansion analysis
sands
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