© 2001

Unsaturated Soil Concepts and Their Application in Geotechnical Practice

  • D. G. Toll

Table of contents

  1. Front Matter
    Pages i-187
  2. Papers

    1. W. Scott Sillers, Delwyn G. Fredlund, Noshin Zakerzadeh
      Pages 243-283
    2. S. S. Agus, E. C. Leong, H. Rahardjo
      Pages 285-309
    3. E. Romero, A. Gens, A. Lloret
      Pages 311-332
    4. Sandra L. Houston, William N. Houston, Claudia E. Zapata, Chris Lawrence
      Pages 333-355
    5. H. Rahardjo, X. W. Li, D. G. Toll, E. C. Leong
      Pages 371-399
  3. Technical Note

  4. Back Matter
    Pages 417-426

About this book


model. They conclude that the models using three fitting parameters provide the best fit over a wide range of suctions. Models for soil-water characteristic curves are only useful if we have experimental data on which to base them. Agus, Leong and Rahardjo (Singapore) present a large number of experimental soil-water characteristic curves determined for two types of residual soil from Sigapore. They present data for eight different sites. This data set allows them to relate the parameters of the soil-water characteristic curves to index properties. They conclude that the relationships derived are suitable to pro­ vide a quick preliminary estimate of a soil-water characteristic curve. The importance of soil-water characteristic curves is emphasized by another con­ tribution dealing with this topic. Aung, Rahardjo, Leong and Toll (Singapore) inves­ tigate the relationship between mercury intrusion porosimetry measurements and soil-water characteristic curves. The porosimetry measurements are presented as soil-air characteristic curves. The slopes of the soil-air characteristic curves are found to be similar to the slopes of the soil-water characteristic curves. The equiv­ alent pore diameters calculated from the mercury entry value and the air entry value appear to be related. Therefore, it is suggested that porosimetry data can be used to construct an estimate of the soil-water characteristic curve.


environment geotechnical engineering stability water

Editors and affiliations

  • D. G. Toll
    • 1
  1. 1.School of EngineeringUniversity of DurhamDurhamUK

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