Published: Jan 1971
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A relatively economical method for performing foundation investigations in several hundred feet of water to penetrations as much as 500 ft from a floating platform has been devised. The exploration system employs drill pipe and a 2.25-in.-outside diameter thin-wall open drive sampler operated by a wire line. Comparative land trials show that the shear strength of clay samples obtained by this procedure are consistently lower than that associated with conventional sampling methods. Application of correction factors provides satisfactory soil strength information that can be used in the foundation design of offshore platforms.
sampling, wire-line, clays, shear strength, foundations, offshore drilling, borings, tests, evaluation
Vice president, McClelland Engineers, Inc., New Orleans, La.
Paper ID: STP26657S