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A Relationship Between Deformation Modulus and SPT N for Gravels

by B. P. Wrench, Steffen Robertson & Kirsten, (Civil) Inc, Johannesburg, South Africa,
E. A. Nowatzki, Steffen Robertson & Kirsten, (Civil) Inc, Johannesburg, South Africa,



Document Type: Proceeding Paper

Part of: Use of In Situ Tests in Geotechnical Engineering

Abstract:

The results of over 200 horizontal plate load tests performed in situ in large diameter boreholes on gravels at various relative densities are used to develop a relationship between deformation modulus (E) and SPT blow counts (N). The results of statistical analyses show that the expression E equals 2. 22 N**0. 888 fits the data with a correlation coefficient equals 0. 99. Limitations of the relationship and cautions regarding its use are discussed.

Subject Headings: Penetration tests | Soil deformation | Gravels | Soil modulus | Material tests | Boring | Plates

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