Laboratory Standard Penetration Tests on Fine Sandsby William F. Marcuson, III, (M.ASCE), Research Civ. Engr.; Research Group, Earthquake Engrg. and Vibrations Div., Soils and Pavements Lab., U.S. Army Engr. Waterways Experiment Station, Vicksburg, Miss.,
Wayne A. Bieganousky, (A.M.ASCE), Research Civ. Engr.; Geodynamics Branch, Earthquake Engrg. and Vibrations Div., Soils and Pavements Lab., U.S. Army Engr. Waterways Experiment Station, Vicksburg, Miss.,
Serial Information: Journal of the Geotechnical Engineering Division, 1977, Vol. 103, Issue 6, Pg. 565-588
Document Type: Journal Paper
The Standard Penetration Test (STP) is critically examined with respect to its ability to estimate relative density in situ. Twenty-six test specimens, 4-ft in diameter by 6-ft high, were constructed using Reid Bedford Model sand and Ottawa sand. Using field drilling equipment, the SPT was performed at three overburden pressures on test specimens built to various densities. The results are presented as a family of curves correlating relative density with the SPT N-values at the testing pressures. It is concluded that the SPT is fairly repeatable in homogeneous deposits; however, variations in density, structure, or lateral stress within the test medium will produce widely scattered N-values. Thus, estimates of in-situ relative densities from N-values should be considered gross values or trends and should not be interpreted as accurate determinations for any specific case.
Subject Headings: Penetration tests | Sandy soils | Laboratory tests | Sand (hydraulic) | Lateral stress | Model tests | Equipment and machinery | Drilling
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