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- W2051641804 abstract "The cone penetration test (CPT) is a widely used test for determining in situ state (or density) of cohesionless soils. The reliability of the estimated in situ state parameter, ψ, is constrained, however, because intrinsic soil properties affect the CPT response (often called a ‘compressibility’ effect). Here, the limiting cavity expansion pressure is used as an analogue for CPT tip resistance, q c , to determine the effect of intrinsic soil properties on the q c versus ψ relation. The limiting cavity pressure is computed by a large strain finite element code using a critical state-based soil model. This cavity expansion idealisation is then scaled to reference calibration chamber data with a universal shape function. The approach leads to a practically simple and theoretically sound method in which results from a few triaxial tests allow calculation of a sand-specific CPT q c –ψ calibration. The method is tested against published reference studies on nine sands and recovers ψ with a precision in void ratio of Δe = ± 0·04 at approximately 80% confidence. This accuracy for soils with elasticity measured by bender elements is considerably greater, Δe = ± 0·04 being obtained at approximately 95% confidence." @default.
- W2051641804 created "2016-06-24" @default.
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- W2051641804 date "2008-10-01" @default.
- W2051641804 modified "2023-10-06" @default.
- W2051641804 title "Interpretation of sand state from cone penetration resistance" @default.
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- W2051641804 doi "https://doi.org/10.1680/geot.2008.58.8.623" @default.
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