EFFECT OF GROUNDWATER LEVELS ON STRESS HISTORY OF THE ST CLAIR CLAY TILL DEPOSIT

OVER 100 FT OF RELATIVELY HOMOGENEOUS AND COMPRESSIBLE LACUSTRINE CLAY AND CLAY TILL DEPOSITS COVER A LARGE PORTION OF THE ST. CLAIR BASIN IN SOUTHWESTERN ONTARIO. THE DEPOSIT IS COMMONLY CONSIDERED TO BE NORMALLY CONSOLIDATED AT DEPTH WITH AN OVERCONSOLIDATED CRUST CAUSED BY DESICCATION AND WEATHERING. BASED ON DATA FROM RECENT LABORATORY ONE- DIMENSIONAL CONSOLIDATION TESTS AND EVIDENCE OF A LOWERED GROUNDWATER LEVEL IN THE PAST, IT CAN BE SHOWN THAT THE ST. CLAIR CLAY TILL DEPOSITS ARE, IN GENERAL, LIGHTLY OVER- CONSOLIDATED AT DEPTH, WITH A HEAVILY OVER-CONSOLIDATED CRUST IN THE UPPER 40 FT (12.2M) OF THE DEPOSIT. THE EVIDENCE OF A HIGHER DEGREE OF OVER-CONSOLIDATION CAN BE USED TO EXPLAIN THE LARGE DISCREPANCIES BETWEEN PREDICTED AND OBSERVIED SETTLEMENTS OF STRUCTURES FOUNDED ON THE ST. CLAIR CLAY TILL. /CGRA/

• Supplemental Notes:
  • Vol 7, No 2, PP 173-187, 6 FIG, 3 TAB, 24 REF
• Authors:
  • Soderman, L G
  • Kim, Y D
• Publication Date: 0

Media Info

• Serial:
  • CANADIAN GEOTECHNICAL JOURNAL
  • Issue Number: 0
  • Publisher: National Research Council of Canada

Subject/Index Terms

• TRT Terms: Clay; Clay soils; Geology; Glacial soils; Groundwater; Lacustrine deposits; Lacustrine soils; Overconsolidation; Soil consolidation test; Soil deposits; Stresses; Till
• Old TRIS Terms: Clay till; Geology (Soils); Glacial lacustrine soils; Stress conditions (Soil)
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00230982
• Record Type: Publication
• Source Agency: CANADIAN GOOD ROADS ASSOCIATION
• Files: TRIS
• Created Date: Feb 12 1971 12:00AM