COMPACTION PRESTRESS

The compressibility and shear strength characteristics of compacted soils, both for the short and long term periods, are dependent, amongst other factors, on the as-compacted prestress and saturated prestess induced in the soil. Their presence is manifested in the consolidation and undrained shear test results available in the literature. Consequently, for an accurate interpretation of these test results, a knowledge of the induced compaction prestresses are essential. A procedure for the prediction of as-compacted prestress based on the precompaction soil conditions and the relevant compaction independent variables is presented. The procedure is based on general soil behavior using results from simple laboratory tests. The calculated values of the as-compacted prestress are compared with experimentally determined as-compacted prestresses, and a good correspondence was obtained. Using statistical regression techniques, prediction equations were derived for the experimentally determined as-compacted prestress, volumetric strain due to saturation, and saturated prestress. The volumetric strain and saturated prestress show a strong dependence on the values of as-compacted prestress. Thus, with a better understanding of the compaction prestresses, which can be controlled through compaction specifications, fills/embankments can be constructed with more predictable compressibility and shear strength behavior. (Author)

• Corporate Authors:

  Purdue University/Indiana Department of Transportation JHRP

  Purdue University, School of Civil Engineering
  West Lafayette, IN  United States  47907-1284
• Authors:
  • Nwabuokei, S O
  • Lovell, C W
• Publication Date: 1984-8

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 31 p.

Subject/Index Terms

• TRT Terms: Compacted soils; Compressibility; Embankments; Equations; Fills; Forecasting; Percent saturation; Prestressing; Regression analysis; Shear strength; Soil consolidation test; Strain (Mechanics)
• Old TRIS Terms: Strains
• Subject Areas: Data and Information Technology; Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00392125
• Record Type: Publication
• Report/Paper Numbers: JHRP-84/22
• Files: TRIS
• Created Date: May 31 1985 12:00AM