This paper presents the results of a field investigation carried out to determine the undrained shear strength of a sensitive clay deposit. The tests were performed by means of a Nilcon vane borer in Louiseville, Quebec, Canada. In order to study the possible anisotropic nature of the undrained shear strength, the apparatus was equipped with both rectangular-shaped and diamond-shaped vanes. The rectangular vanes had a height/diameter ratio that varied between 0.5 and 2.0. The diamond-shaped vanes had their blades cut at an angle that varied between 30 and 60 degrees with respect to the horizontal. The results of the tests carried out with the rectangular vanes indicate that the undrained shear strength in the vertical plane Suv is lower than the undrained shear strength in the horizontal plane Suh. Thus, the value of the degree of strength anisotropy, defined as Suh/Suv, varies between 1.14 and 1.41. For the diamond-shaped vanes, the inferred strengths are intermediate between Suh and Suv. In addition, an elliptical failure criterion is found to adequately describe the observed response. (A) For the covering abstract see IRRD 863366.

  • Corporate Authors:

    American Society for Testing and Materials (ASTM)

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Silvestri, V
  • Publication Date: 1988


  • English

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Filing Info

  • Accession Number: 00662234
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Jul 28 1994 12:00AM