This research investigates the anisotropic consolidation behavior of soft Bangkok clay by means of constant rate of strain consolidation tests with vertical and radial drainage conditions. Conventional oedometer tests were conducted to verify results of constant rate of strain consolidation tests in the vertical flow condition. Better-defined compression curves were obtained from CRS tests, resulting in improved estimation of preconsolidation pressure. A new method of determining preconsolidation pressure on the pore pressure ratio gave values close to those obtained from the Casagrande construction of compression curves. Results of CRS tests under different drainage conditions indicate that soft Bangkok clay is slightly anisotropic, with the ratio of coefficients of consolidation and permeability in the horizontal to vertical directions of about unity at in-situ stress. The difference increases with increasing stress due to stress-induced anisotropy of the soil.

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  • Corporate Authors:

    ASTM International

    100 Barr Harbor Drive
    West Conshohocken, PA  United States  19428-2959
  • Authors:
    • Seah, T H
    • Koslanant, S
  • Publication Date: 2003-9


  • English

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  • Accession Number: 00963190
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 11 2003 12:00AM