Torsion shear tests on Atlantic muck, the Panama Canal : concluding report
U.S. Army Engineer Waterways Experiment Station.
Technical memorandumPreface: The Special Engineering Division, The Panama Canal, in a letter to the President, Mississippi River Commission, dated 2 April 1947, requested the Waterways Experiment Station to design and construct a device for performing torsion shear tests on soils. It was also requested that the strength characteristics of Atlantic Muck, in particular the decrease and ultimate residual values of the shearing resistance after initial failure of this material, be investigated by means of torsion shear tests. A torsion ring shear apparatus was designed and built in the summer and fall of 1947, and a preliminary series of tests on samples of Atlantic Muck was performed in the winter and spring of 1948. Subsequent to the preliminary series of tests, the torsion shear apparatus was subjected to a very detailed calibration, as part of a general development of soil testing equipment at the Waterways Experiment Station, and a new series of tests was performed on a sample of Lake Providence Clay and several samples of Atlantic Muck. The results of these investigations are presented in this report. The work was performed under the general direction of Mr. W. J. Turnbull, Chief, Soils Division, Waterways Experiment Station, and Mr. S. J. Johnson, Chief, Embankment and Foundation Branch. The torsion shear apparatus was designed by Dr. M. Juul Hvorslev, Consultant, and built in the machine shops of the Waterways Experiment Station. The first series of tests was performed and the preliminary report of October 1948 prepared by Mr. W. C. Sherman. The final calibration of the apparatus and series of tests were performed by Mr. R. I. Kaufman. This report was prepared by Messrs. Hvorslev and Kaufman.
U.S. Army Engineer Waterways Experiment Station.Engineer Research and Development Center (U.S.)
Shear strength of soils; Marine sediments; Panama Canal
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