![]() ![]() (1975), Measurement of insitu shear strength, keynote lecture, Proceedings of the conference on in-situ measurement of soil properties, June 1-4, 1975, vol. (1956), Penetration tests and bearing capacity of cohesionless soils, Journal of the soil mechanics and foundation division, ASCE, Vol. (2001), Geotechnical site characterization using Cone, piezocone, SPTu, and VST, Civil and Environmental Engineering Department, Georgia Institute of Technology 36 (4), 1-9, Japanese Geotechnical Society. Empirical correlation between penetration resistance and effective friction of sandy soil. (1984), Settlement of foundations on sand and gravel, Proceedings of the Institution of Civil Engineers, Part 1, 1985, 78, Dec., 1325-1381. This is a statistical method, and for that reason, the mean + sigma and mean - sigma ranges are also shown.Ĭorrections need to be made in the SPT blowcount, according to the recommendations of Youd et al (2001), for the type of sampler, the rod length, the borehole diameter, the energy transmitted to the sampler and the overburden stress.īurland, J.B., Burbidge, M.C. The N value in this method is the average N value over the depth of influence below the footing, approximately, 1.5 times the width of the foundation. The Burland and Burbdige (1984) method is used, which was considered by the author as the most reliable method to date. ![]() This is a simple empirical equation provided by Meyerhof and is in general very conservative. ![]() 1984, Meyerhof 1956) are not used in this program as the use of the Standard Penetration Test has improved since then. The more traditional recommendations (Peck et al. These methods are based on actual data and take into account the effect of the overburden stress. Two correlations are used: The Schmertmann (1975) and the Hatanaka and Uchida (1996). The SPT blowcount is correlated to the friction angle. Method 1: Terzaghi bearing capacity equation ![]() The program was developed as part of a research on the reliability of the use of SPT in the shallow foundation design. Various methods are used for the bearing capacity criterion and the settlement criterion (serviceability). This spreadsheet performs shallow foundation design using data from the Standard Penetration Test. ![]()
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