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Title: Cyclic triaxial compression tests, Watts Bar Nuclear Power Plant site, southeast Tennessee
Authors: Tennessee Valley Authority.
Gilbert, P. A.
Collins, Stephen A.
Keywords: Cyclic triaxial compression tests
Soil liquefaction
Soil mechanics
Silty sands
Soil tests
Soil testing
Triaxial shear tests
Watts Bar Nuclear Power Plant
Publisher: Soils and Pavements Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Miscellaneous Paper
Abstract: The objective of this study was to furnish cyclic triaxial test results for use in a liquefaction potential analysis of silty sand in the Watts Bar Nuclear Power Plant cooling water intake channel earth-cut slope. The in situ foundation density was determined from undisturbed boring samples. Saturated consolidated-undrained cyclic triaxial tests were performed on the fine sand at the determined in situ density and at an effective confining pressure computed from in situ overburden weights. The cylindrical soil specimens used in this investigation were 2.8 in. in diameter and 7 in. high. A series of tests was performed on specimens consolidated to isotropic stress conditions, and two other series of tests were performed on specimens consolidated to two anisotropic stress conditions. Under the action of a cycling axial load, the pore water pressure in the isotropically consolidated specimens increased to a level equal to the chamber pressure, and large deformations occurred suddenly, accompanied by a total loss of strength. In the anisotropically consolidated specimens, the pore pressure never reached the level of the chamber pressure, and a total loss of strength did not occur. Large deformations did, however, occur and were accompanied by a partial loss of strength.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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