Transcription of Subsurface Exploration Using the Standard Penetration Test ...
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Subsurface Exploration Using the Standard Penetration Test ...
Subsurface Exploration Using the Standard PenetrationTest and the Cone Penetrometer TestJ. DAVID ROGERSD epartment of Geological Sciences & Engineering, 125 McNutt Hall,University of Missouri Rolla, Rolla, MO 65409-0230 Key Terms:Site Exploration , Site Characterization, Subsurface Exploration , Drilling, Standard Penetra-tion Test, Cone PenetrometerABSTRACTThe Standard Penetration Test (SPT) and ConePenetrometer Test (CPT) have become industrystandards for Subsurface geotechnical investigationsusing small diameter (<8-in. [20-cm]) borings andsoundings. Both procedures have evolved overa period of 100 and 70 years, respectively, and havebeen adopted as ASTM standards. Each procedurehas certain advantages over the other, but both canelicit incorrect data under particular subsurfaceconditions that are often overlooked, depending onthe experience of field personnel operating or loggingthe tests .
the methods presently used in advancing water wells. In 1922, Gow was absorbed as a subsidiary of the Raymond Concrete Pile Co. (RCPC) under the direction of Linton Hart (Fletcher, 1965). The Gow Division of RCPC continued to employ the pipe sampler, which was hand powered and operated by three-man crews. The split-
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