SETTLEMENTS RESULTING FROM SECONDARY COMPRESSION--THE GLOUCESTER TEST FILL

Observations of pore pressure and settlement distributions have been carried out on a test embankment founded on a sensitive clay deposit. Extensive laboratory and field tests to evaluate the consolidation behaviour have been performed. From this study, it is shown that: more than 50% of the settlement is due to secondary compression occurring under essentially constant effective stress. The coefficient of consolidation, the primary and secondary compresibility can be adequately determined from large specimens (113 mm diameter by 50 mm thick, or larger). Conventional size specimens (50 mm diameter by 13 mm thick) even when trimmed from block samples, underestimate the coefficient of consolidation by one to two orders of magnitude. The use of Gibson and Lo theory appears to yield results in reasonable agreement with field observations of settlement both in magnitude and time rate. In this application, the viscosity must be extrapolated to the field time. /Author/

• Corporate Authors:

  Ontario Ministry of Transportation & Communic, Can

  1201 Wilson Avenue
  Downsview, Ontario M3M 1J8,   Canada 
• Authors:
  • Lo, K Y
  • Bozozuk, M
  • Law, K T
• Publication Date: 1977-8

Media Info

• Features: Figures; References; Tables;
• Pagination: 21 p.

Subject/Index Terms

• TRT Terms: Compressibility; Compression; Consolidations; Embankments; Field tests; Ground settlement; Laboratory tests; Pore pressure; Sensitive clays; Stresses; Viscosity
• Old TRIS Terms: Secondary compression
• ITRD Terms: 5791: Consolidation (soil); 4041: Deposit (natural); 2801: Embankment; 5762: Pore water pressure; 5790: Secondary consolidation; 4197: Sensitive clay; 5792: Settlement
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00167850
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: ITRD, TRIS
• Created Date: Feb 16 1978 12:00AM