DILATANCY OF FROZEN SOIL AND DEVELOPMENT OF A STRAIN THEORY OF CREEP

The results are presented of investigations of the laws governing the rheological behaviour of frozen soils, on the bases of which an attempt has been made to develop a variation of the strain theory of creep. Experimental investigations of creep in frozen, silty, sandy loams were carried out under triaxial compression. The tests were performed on a device that permitted prolonged testing under constant loads over a wide stress range, and the measurement of the axial, radial, and volumetric strains of the samples. These studies have established that progressive flow and failure of a frozen soil is connected with volumetric strain caused by decompression (negative dilatancy), and that the stabilizing shear strain is attended by a process of complete compression of the soil (positive dilatancy). A huypothesis was adopted of synchronmism of the volumetric-strain rate of a frozen soil, under the action of the stress deviator, and the shear-strain rate which was confirmed by tests carried out to study the creep of frozen soil under triaxial compression conditions. The established relations between the shear-strain rate and the volumetric-strain rate permit reducing the number of experimentally obtained creep characteristics of frozen soils (creep cores). The formulated variation of the strain theory of creep can be extended to thawed days and other types of soils after the corresponding experimental substantiation.

• Supplemental Notes:
  • Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 2, pp 15-18, February, 1975.
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Zaretskii, Y K
  • Gorodetskii, S E
• Publication Date: 1975-2

Media Info

• Features: Figures; References;
• Pagination: p. 127-132
• Serial:
  • Hydrotechnical Construction
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Compression; Creep; Frozen soils; Rheology; Strain (Mechanics); Testing
• Uncontrolled Terms: Triaxial compression
• Old TRIS Terms: Strains
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00152989
• Record Type: Publication
• Files: TRIS
• Created Date: May 31 1977 12:00AM