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Strength Characteristics of Clays Tested in Different Laboratory Devices

机译：不同实验室装置中粘土强度特性的测试

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The standard triaxial, the direct-simple shear device (N.G.I. type), and the thin long triaxial hollow cylinder, all devices used in the laboratory for the testing of soils, are compared. The study focuses on the results obtained with the three apparatuses under both static and cyclic conditions, and for Ko-consolidated and overconsolidated clay. The state of stresses within the simple shear specimen is studied theoretically using the finite element method. A substantial degree of non-uniformity was encountered in the simple shear, contrary to the long hollow cylinder with thin walls acted upon by the same pressure on both sides. Such uniformity cannot be guaranteed in the solid cylinders. It is concluded that the state of stresses within the thin long hollow cylinder will lead to a close representation of the conditions in the field. The simple shear is found to be of no value for research purposes.

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