Visualizing the failure surface of a laboratory vane shear in soft clay using transparent surrogate soil

J. F. Wallace, C. M. Chini, C. J. Rutherford, J. M. Peschel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The laboratory vane shear test is commonly used in offshore geotechnics to measure the undrained shear strength of very soft to medium clay samples. The assumed failure surface used to calculate the undrained shear strength resulting from rotation of the vane is a cylinder encompassing the outside edges of the blades. Laboratory vane shear tests were conducted in a transparent soft clay surrogate to visualize the resulting deformations and failure surface of the vane.A particle tracking algorithm was performed on images captured during testing to measure relative displacement and determine a failure surface. Results of the experimental study show rotational displacement within the volume enclosed by the vane. While no deformations occurred outside the enclosed volume in the vertical direction, relatively small deformations occurred outside the enclosed volume in the horizontal direction. These deformations show two distinct phases separated by the point where peak undrained shear strength was measured.

Original languageEnglish (US)
Title of host publicationFrontiers in Offshore Geotechnics III - 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015
EditorsVaughan Meyer
PublisherCRC Press/Balkema
Pages1227-1232
Number of pages6
ISBN (Electronic)9781138028487
DOIs
StatePublished - 2015
EventProceedings of the 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015 - Oslo, Norway
Duration: Jun 10 2015Jun 12 2015

Publication series

NameFrontiers in Offshore Geotechnics III - 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015

Other

OtherProceedings of the 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015
Country/TerritoryNorway
CityOslo
Period6/10/156/12/15

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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