Scale Effects in Cone Penetration Tests

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by Dario Cardoso de Lima, Univ Federal de Vicosa, Vicosa, Brazil,
Mehmet T. Tumay, Univ Federal de Vicosa, Vicosa, Brazil,

Document Type: Proceeding Paper

Part of: Geotechnical Engineering Congress—1991:

Abstract: A field testing program was undertaken to examine the existence of scale effects between a miniature 1.27 cm2 and 15 cm2 cross-section and the 'reference' 10 cm2 cross-section electronic friction cone penetrometer. Five sites in the State of Louisiana were selected for the field testing program, encompassing a wide range of sandy, silty and clayey soils. Compacted embankments and natural grade soils were investigated. Soundings 9.5 m deep were performed in three natural ground sites and two highway embankments. At each chosen site, five soundings apiece were executed with the 15 cm2 and the 'reference' cone penetrometers, and three soundings with the 1.27 cm2 miniature cone. This paper presents the statistical evaluation of the scale effects and the recommended corrective measures for proper cross-correlation.

Subject Headings: Penetration tests | Scale effect | Clays | Measuring instruments | Sandy soils | Cross sections | Friction | North America | Louisiana | United States

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