MODELING OF THERMAL FAILURE OF SATURATED CLAYS. NUMERICAL MODELS IN GEOMECHANICS. NUMOG III. PROCEEDINGS OF THE 3RD INTERNATIONAL SYMPOSIUM HELD AT NIAGARA FALLS, CANADA, 8-11 MAY 1989

This article describes a thermoplasticity theory which is employed to explain and to simulate thermal failure in saturated clays. The hypothesis is that thermal failure is due to effective stress unloading in the presence of thermally induced plastic strain. The results of thermal failure tests on 3 different clays (boom, pasquasia and pontida silty clay) are described and compared with results obtained using the proposed model of the mechanical behaviour of water saturated clay under thermal failure conditions. The experiment consisted of heating a clay specimen at constant deviatoric stress and constant total isotropic stress. For pontida and boom clays this state is taken as normally anisotropically consolidated, whereas the pasquasia clay is over consolidated. Heating is monotonic in tests using boom and pontida silty clays. Cycles of heating and cooling are applied to pasquasia clay. Shear induced abnormal dilatancy is shown to play an essential role in the stabilization of thermal failure. Further experimental studies should be undertaken to ascertain whether this dilatancy is caused by mechanical or thermal factors. For the covering abstract of the conference see IRRD 824029.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/1851664254
• Corporate Authors:

  Elsevier Science Publishers

  Crown House, Linton Road
  Barking, Essex IG11 8JU,   England 
• Authors:
  • Hueckel, T
  • Pellegrini, R
• Publication Date: 1989

Language

• English

Media Info

• Pagination: p. 81-90
• Serial:
  • Publication of: Elsevier Applied Science Publishers Limited
  • Publisher: Elsevier Science Publishers

Subject/Index Terms

• TRT Terms: Conferences; Consolidation; Deformation; Dilatancy; Evaluation and assessment; Failure; Isotropy; Mathematical models; Plasticity; Soil stabilization; Stresses; Temperature
• Subject Areas: Geotechnology;

Filing Info

• Accession Number: 00497913
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 1-85166-425-4
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM