PROFILING OCR IN STIFF CLAYS BY CPT AND SPT

Standard penetration tests (SPT) and cone penetration tests (CPT) have conventionally been used to index profiles of undrained shear strength s sub u in clay deposits. Since s sub u is related to stress history, an alternative use of penetration resistances is the profiling of in-situ overconsolidation ratio (OCR). An empirical methodology is developed based on compiled data bases from 50 sites investigated by SPTs and 40 sites tested by CPTs. The study indicates general trends occur between the in-situ OCR and penetration resistances normalized to effective overburden stress in clays. Site specific calibration with laboratory consolidation tests is required, however, for profiling. Electric CPTs are preferable over SPTs and mechanical CPTs for profiling stress history because they are more repeatable and less subject to operator influence.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01496115
• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Mayne, P W
  • Kemper Jr, J B
• Publication Date: 1988-6

Media Info

• Features: Figures; References;
• Pagination: p. 139-147
• Serial:
  • Geotechnical Testing Journal
  • Volume: 11
  • Issue Number: 2
  • Publisher: ASTM International
  • ISSN: 0149-6115
  • EISSN: 1945-7545
  • Serial URL: https://www.astm.org/products-services/standards-and-publications/geotechnical-testing-journal.html

Subject/Index Terms

• TRT Terms: Calibration; Clay; Cone penetrometers; Deformation curve; Overconsolidation; Soil penetration test
• Uncontrolled Terms: Profiles
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00469647
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 31 1988 12:00AM