RELATIONSHIP BETWEEN TYPE AND CONDITION OF SOIL IN THE SUBGRADE AND THE DYNAMIC E-MODULUS (MEAN MODULUS) OF THE SOIL DURING DIFFERENT SEASONS OF THE YEAR. A PRELIMINARY INVESTIGATION

SAMBAND MELLAN UNDERGRUNDENS JORDART OCH TILLSTAAND OCH DESS DYNAMISKA E-MODUL (MEDELMODUL) VID OLIKA AARSTIDER. EN PRELIMINAER UNDERSOEKNING

The aim was to obtain information on the loadbearing capacity, expressed as a dynamic e-modulus value, of different types of soil and the way in which the e-modulus varies with the condition of the soil when this constitutes the subgrade for a gravel road pavement. The e-modulus value has been estimated from falling weight tests. Ground investigations, water ratio analysis and measurements of frost depth have been made in order to describe the various types of soil and their condition. The results of the investigation indicate the following: (1) e-modulus values vary during ground thaw between 14 mpa for a subgrade of silt on clay and 143 mpa for a subgrade of sand with inclusions of coarser material, (2) unexpectedly high e-modulus values for morainic subgrades during ground thaw were obtained, (3) an unexpectedly small decrease was found in the e-modulus value during ground thaw. The largest decrease was found in silt on clay, (4) a clear relationship between the e-modulus and particle size distribution was found in the sedimentary subgrades but not in the morainic subgrades, (5) no clear relationship was established between the e-modulus and the water ratio in each type of soil. These results have been obtained during one year studies. The measurements will continue so that the significance of the results can be clarified. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03476049
• Corporate Authors:

  Swedish National Road and Transport Research Institute (VTI)

  Linköping,   Sweden  SE-581 95
• Authors:
  • WIMAN, L
• Publication Date: 1982

Language

• Swedish

Media Info

• Features: Figures; References; Tables;
• Pagination: 155 p.
• Serial:
  • VTI MEDDELANDE
  • Issue Number: 308
  • Publisher: Swedish National Road and Transport Research Institute (VTI)
  • ISSN: 0347-6049

Subject/Index Terms

• TRT Terms: Bearing capacity; Clay; Depth; Dynamic modulus of elasticity; Falling weight deflectometers; Freeze thaw durability; Frost; Gravel roads; Measurement; Modulus of deformation; Moisture content; Moraines; Sand; Sediments; Silts; Subgrade (Pavements); Subsoil; Thaw
• Uncontrolled Terms: Particle size distribution
• Old TRIS Terms: Falling weight apparatus
• ITRD Terms: 3085: Bearing capacity; 4177: Clay; 6499: Depth; 2577: Freezing thawing cycle; 2585: Frost; 4011: Glacial; 2986: Low cost road; 6136: Measurement; 5919: Modulus of elasticity; 5920: Moisture content; 6200: Particle size distribution; 4190: Sediment; 4149: Silt; 2950: Subgrade; 2930: Subsoil
• Subject Areas: Geotechnology; Highways; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00376005
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS
• Created Date: Jul 30 1983 12:00AM