LABORATORY INVESTIGATION OF THE BEHAVIOUR OF SOILS UNDER CYCLIC LOADING: A REVIEW

The study of soil test results cannot be considered separately from the way in which they were obtained. This review concentrates on the philosophy behind and details of soil testing as well as considering results from cyclic loading behaviour of sands and clays. Because of the wide mineralogical differences and range of plasticities encountered, no one model will be able to match in detail results from all soil types. Analysis of cyclic test results do however produce some indication of the relevant mechanisms at the particulate and macroscopic levels. Results discussed show that the greater susceptibility of sands to cyclic loading is linked with their very much stiffer unloading - reloading response. A much higher pore pressure is required to achieve the critical level for sand. Effective stresses and pore pressures provide the keycontrolling the behaviour of soils under cyclic loading. The importance of the first few cycles on the changes in both the pore pressure and stiffness is emphasized. Slow cyclic tests are preferred to fast ones because pore pressure measurements in the former are more likely to reflect the actual intentions of the soil. The uniformity of conditions within a sample must be monitored and could be analyzed as a boundary value problem rather than a single element. (TRRL)

  • Availability:
  • Corporate Authors:

    University of Cambridge

    Department of Engineering, Trumpington Street
    Cambridge,   United Kingdom  CB2 1PZ
  • Authors:
    • Wood, D M
  • Publication Date: 1980-4

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Filing Info

  • Accession Number: 00335233
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: TR 84 Monograph
  • Files: ITRD, TRIS
  • Created Date: Oct 28 1981 12:00AM