ISSN: 0149-6115
Page Count: 7

Membrane Penetration in Triaxial Tests

Boháč, J
Research engineer and chief scientist,Institute of Theoretical and Applied Mechanics, Czechoslovak Academy of Sciences,

Feda, J
Research engineer and chief scientist,Institute of Theoretical and Applied Mechanics, Czechoslovak Academy of Sciences,

Abstract

Volumetric deformations of triaxial specimens of sand measured with a burette are burdened with an error caused by a rubber membrane penetrating into the peripheral voids of the specimen. This effect is of the same order of magnitude as volumetric deformation of the soil skeleton and should be eliminated. To this end, a method has been proposed based on the K⁰-stress path. Membrane penetration for the particular material has been approximated by logarithmic and hyperbolic curves. The resulting correction considerably surpasses most published expressions because the latter usually do not consider the porosity of specimens.

Keywords:
sands, triaxial tests, membranes, K0-stress path, membrane penetration

Paper ID: GTJ10026J
DOI: 10.1520/GTJ10026J
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