The standard penetration test

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This article needs additional citations for verification. Electric Power Research Institute. Stay up the good work! Environmental and Engineering Geoscience, Vol. Journal of Geotechnical Engineering, Vol.

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The blow count provides an indication of the density of the ground, and it is used in many empirical geotechnical engineering formulae.

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Standard penetration test

Atterberg limits California bearing ratio Direct shear test Hydrometer Proctor compaction test R-value Sieve analysis Triaxial shear test Hydraulic conductivity tests Water content tests. The standard weight of the hammer is lbs. This article needs additional citations for verification. The number or blows required for 12 inches penetration resistance of the soil. By using this site, you agree to the Terms of Use and Privacy Policy. The SPT is used to provide results for empirical determination of a sand layer's susceptibility to soil liquefactionbased on research performed by Harry Seed, T. The usefulness of SPT results depends on the soil type, with fine-grained sands giving the most useful results, with coarser sands and silty sands giving reasonably useful results, and clays and gravelly soils yielding results which may be very poorly representative of the true soil conditions.

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