Research Article
Nov 1977
Membrane Penetration and Its Effect on Pore Pressures
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VIEW THE REPLYAuthors: Manfred Kiekbusch and Bernd SchuppenerAuthor Affiliations
Publication: Journal of the Geotechnical Engineering Division
Volume 103, Issue 11
Abstract
An apparatus is described to measure the volume changes due to the membrane penetration into the interstices of a specimen of sand or silt with changing pressures on the membrane. These tests confirm the relation between mean grain size and membrane penetration. It is possible to reduce the membrane penetration by up to 85% by spreading the membrane with a thin layer of liquid rubber. This initially liquid rubber is pressed into the interstices of the surface grains by the cell pressure where it gradually hardens. A comparison of undrained triaxial tests with sand shows that treating the membrane with liquid rubber the excess pore-water pressure generated in the undrained test is up to 100% higher than in a test with a normal membrane. So the normal use of membranes will underestimate the excess pore-water pressure and overestimate the undrained shear strength.
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Published In
Journal of the Geotechnical Engineering Division
Volume 103 • Issue 11 • November 1977
Pages: 1267 - 1279
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Nov 1977
Published online: Feb 11, 2021
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Authors
Affiliations
Manfred Kiekbusch
Head; Soil Mechanics Lab., Bundesanstalt fur Wasserbau, Hamburg, Federal Republic of Germany
Bernd Schuppener
Bundesanstalt fur Wasserbau, Hamburg, Federal Republic of Germany
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