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Title: Second program of special shear tests of East Atchafalaya Basin protection levee foundation soils
Authors: Horz, Raymond C.
Hale, Gene P.
Keywords: Soil mechanics
Shear tests
East Atchafalaya Basin Protection Levee
Soft soils
Clay soils
Foundation soils
Soil tests
Soil testing
Publisher: Soils and Pavements Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Description: Miscellaneous Paper
Abstract: The results of consolidated undrained (R) and unconsolidated undrained (Q) triaxial compression and triaxial creep tests with pore water pressure measurements are presented in this report. The tests were performed on undisturbed samples from four closely spaced borings made adjacent to the East Atchafalaya Basin Protection Levee (EABPL) Test Section III. The soils tested consisted primarily of very soft to soft plastic and organic clays. Conventional controlled strain Q tests were performed throughout the depth range of one of the borings and five depth intervals were selected in which samples from the adjacent three borings were chosen for controlled stress Q and R testing. The Q and R tests on samples from the five selected intervals consisted of (1.) short-term strength tests in which controlled stress loading was used to cause failure in from 20 to 40 minutes and (2.) long-term tests (creep tests) in which companion specimens were permitted to deform under a constant deviator stress for periods up to 182 days. Creep tests were performed using deviator stresses which were 90, 80, 60, and 40 percent of the maximum deviator stresses indicated by the short-term tests. Axial deformation versus elapsed time as well as effective lateral stress versus time plots are presented for each of the creep tests. Low-friction end platens used throughout the test program contributed to stress uniformity in the test specimens as evidenced by the fact that specimens maintained their cylindrical shape during shear deformation better than if standard end platens had been used. NOTE: This is a revised edition of a report originally released in August 1971.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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