NORMALIZED DESIGN PROCEDURES IN SENSITIVE CLAYS

Methods similar to SHANSEP which have been used for design on extremely sensitive soils are described, and the ways in which they differ from the SHANSEP method are illustrated. The general approach of accounting for stress history and deformation constraint when testing soils is sound for engineering many geotechnical problems. The normalized soil properties, as in the SHANSEP design approach, while appropriate for many soils, must be limited in application to structurally sensitive soils. Several modifications to SHANSEP are appropriate for these materials. The most important of these is that laboratory testing should be done at the same level of stress as expected in situ. It is especially critical not to reconsolidate specimens to stresses beyond the yield curve. If sufficient care is taken to minimize the distrubance of these soils during sampling the testing, the disturbance effects of stress relief will be small. Block samples or large diameter piston samples are usually necessary. To determine post yield behavior, particular stress deformation relationships, requires very precise modeling of both stress and deformation constraints expected in the field.

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Filing Info

  • Accession Number: 00131544
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11684 Proceeding
  • Files: TRIS
  • Created Date: May 14 1976 12:00AM