The scope of the paper is actually narrower than its title would suggest i.e. the definition of terms related to the liquefaction of cohesionless soil-water systems as a consequence of increased pore pressure and reduced effective stress. A considerable amount of knowledge and terminology available on the liquefaction of several important systems (e.g., noncohesive soil-sand, gravel, etc-in the dry state with particle interstices filled by air or other gases, or empty as approximated on the moon; cohesive soil-water systems possessing thixotropic characteristics such as the Norwegian marine clays and weakly cemented dry soil systems) are disregarded. The formation of a new Committee on Soil Liquefaction with members whose interests cover the entire field is recommended. Several specific recommendations concerning the definitions are made. A global definition of "liquefaction" is preferable, such as failure of a granular soil mass due to pore pressure increase (A reservation can be added to exclude failure due to external hydraulic agencies.) "Cyclic strain softening" suggests strain softening as in a plastic material. However, softening is not produced by strains but by pore pressure increase. Hence, the term should be dropped. The term "full or 100% pore pressure ratio" should be discarded, since this condition is neither necessary nor sufficient for liquefaction. A more consistent definition of "shear strength" is possible, i.e. relevant shear stress component in a state of continued shear deformation that is incrementally stationary. Regarding the term "unlimited flow strain", it is noted that if the flow is unlimited, strains are necessarily undefined.

  • Availability:
  • Supplemental Notes:
    • Discussion of ASCE Paper 14037 (September 1978).
  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  United States  10017-2398
  • Discussers:
    • Winterkorn, H F
    • GUDEHUS, G
  • Publication Date: 1979-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00196146
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 14549 Proceeding
  • Files: TRIS
  • Created Date: Oct 17 1979 12:00AM