Cone Resistance as Measure of Sand Strength

by James K. Mitchell, (F.ASCE), Prof. of Civ. Engrg.; Univ. of California, Berkeley, Calif.,
Tom A. Lunne, Civ. Engr.; Norwegian Geotechnical Inst., Oslo, Norway,


Serial Information: Journal of the Geotechnical Engineering Division, 1978, Vol. 104, Issue 7, Pg. 995-1012


Document Type: Journal Paper

Discussion: Karafiath Leslie L. (See full record)
Discussion: De Beer E. (See full record)
Closure: (See full record)

Abstract: Available theories for deduction of the drained friction angle of sands from the results of static cone penetration tests were applied to data from several field sites and laboratory chamber tests. Only results obtained using a standard cone with 60? apex angle and 10-cm² base area were considered. The methods of De Beer and Trofimenkov are shown to yield overconservative estimates of φ߱. The methods of Meyerhof, Durgunoglu and Mitchell, Janbu, and Schmertmann give values of φ߱ varying by only 2? to 5? and agree well with the results of laboratory drained triaxial tests. The methods of Meyerhof, Janbu, and Schmertmann are best suited for practical engineering applications. However, the Meyerhof method cannot be used if a limiting value of cone resistance cannot be defined, Schmertmann's method requires knowledge of Ko, and Janbu's method is applicable only if the cone resistance increases approximately linearly with depth.

Subject Headings: Penetration tests | Conical bodies | Load and resistance factor design | Drainage | Sandy soils | Triaxial tests

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