COLLAPSE OF SATURATED SOIL DUE TO REDUCTION IN CONFINEMENT. TECHNICAL NOTE

Two very different soils--a uniformly graded sand and an undisturbed clayey colluvial soil--are evaluated for their potential for collapse due to a reduction in confinement. Soil specimens are consolidated anisotropically and subjected to constant-shear-drained (CSD) tests. During the CSD test, the effective confining pressure is gradually reduced while the shear stress is held constant. Collapse is observed before the failure envelope or steady state is reached in the case of very loose specimens. Specimens of similar density and confining pressure react differently to the CSD stress paths and to the typical compression stress paths. This observation leads investigators to conclude that knowledge of the stress path is critical to accurately predict the collapse potential, and thereby the potential for flow failure, of loose saturated soils.

Language

  • English

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: p. 216-220
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00675503
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 8 1995 12:00AM