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Titre du document / Document title

Empirical correlation between SPT n-value and relative density for sandy soils

Auteur(s) / Author(s)

CUBRINOVSKI M. (1) ; ISHIHARA K. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Kiso-Jiban Consultants Co., Ltd., 1-11-5 Kudan-Kita, Chiyoda-Ku, Tokyo 102-8220, JAPON
(2) Department of Civil Engineering, Science University of Tokyo, 2641 Yamazaki, Noda, Chiba 278-0022, JAPON

Résumé / Abstract

It has been known that the penetration resistance depends on the grain size of soils, and that fines-containing sands have smaller SPT N-values than clean sands. Previous investigations on the link between the penetration resistance and relative density have indicated that the ratio between the normalized N-value and the square of the relative density, N1 /Dr2, is dependent on the grain size of sands. While this dependence has not been properly quantified, it has been customary to utilize the well-known expression of Meyerhof with N1/ Dr2 being fixed at 41. In this paper, an attempt was made to correlate the penetration resistance and relative density by accounting for the grain size properties of soils. The void ratio range (emax - emin) was used as a measure indicative of the grain size and grain size composition. It was found that N1 /D r2is highly dependent on the value of (emax-emin) and that this ratio gradually decreases with increasing void ratio range from a value of about 100 for gravels to a value of about 10 for silty sands. This dependence is mathematically formulated and used to establish an empirical correlation between the SPT N-value and Dr that is applicable to various kinds of soils ranging from silty sands to gravels. The correlation is developed by using data of high-quality undisturbed samples and results of SPT measurements on natural deposits of sandy soils and gravels.

Revue / Journal Title

Soils and foundations    ISSN  0038-0806   CODEN SOIFBE 

Source / Source

1999, vol. 39, no5, pp. 61-71 (29 ref.)

Langue / Language

Anglais

Editeur / Publisher

Japanese Geotechnical Society, Tokyo, JAPON  (1968) (Revue)

Mots-clés anglais / English Keywords

Soil mechanics

;

Sandy soil

;

Penetration test

;

Density

;

Particle size distribution

;

Particle fineness

;

Void fraction

;

Empirical relation

;

Mathematical formula

;

Gravel

;

Accuracy

;

Numerical simulation

;

Liquefaction

;

Mots-clés français / French Keywords

Mécanique sol

;

Sol sableux

;

Essai pénétration

;

Densité

;

Distribution dimension particule

;

Finesse particule

;

Fraction vide

;

Relation empirique

;

Formule mathématique

;

Gravier

;

Précision

;

Simulation numérique

;

Liquéfaction

;

Mots-clés espagnols / Spanish Keywords

Mecánica suelo

;

Suelo arenoso

;

Ensayo penetración

;

Densidad

;

Distribución dimensión partícula

;

Finura partícula

;

Fracción vacío

;

Relación empírica

;

Fórmula matemática

;

Ripio

;

Precisión

;

Simulación numérica

;

Licuefacción

;

Localisation / Location

INIST-CNRS, Cote INIST : 19776, 35400008171663.0050

Nº notice refdoc (ud4) : 1247179



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