FRICTIONAL HEAT AND STRENGTH LOSS IN SOME RAPID LANDSLIDES

Frictional heat generated within fluid-saturated landslide slip zones can create an increase in pore fluid pressure. This rise in fluid pressure is enhanced by large values of friction coefficient, initial porosity and slide displacement, and by small values of slip zone thickness and compressibility. If maintained under conditions of fast slip, and small wall rock permeability and shear dilatancy, fluid pressure rise can induce rapid frictional strength loss during sliding. Moderate sliding can thereby be converted under certain conditions into catastrophic descent. The rate of temperature rise within a slip zone diminishes as pore fluid pressures rise. Vaporization seems possible only under restricted conditions, and results suggest that large gas pockets are not generally produced. However, rock melting or dissociation may be relatively common under portions of large slides. Frictional heat-induced fluid pressure enhancement is proposed as a possible explanation for the problem of low kinetic friction posed by the vaiont slide. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00168505
• Corporate Authors:

  Institution of Civil Engineers

  One Great George Street, Westminster
  London,   United Kingdom  SW1P 3AA
• Authors:
  • VOIGHT, B
  • Faust, C
• Publication Date: 1982-3

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 43-54
• Serial:
  • GEOTECHNIQUE
  • Volume: 32
  • Issue Number: 1
  • Publisher: Thomas Telford Limited
  • ISSN: 0016-8505

Subject/Index Terms

• TRT Terms: Compressibility; Dilatancy; Dislocation (Geology); Friction; Heat; Heat loss; Landslides; Loss and damage; Percent saturation; Permeability; Pore water pressures; Porosity; Rockslides; Strength of materials; Temperature; Thickness
• Uncontrolled Terms: Quick
• ITRD Terms: 5905: Compressibility; 5907: Degree of saturation (mater); 5452: Friction; 6743: Heat; 4029: Landslide; 9040: Loss; 5921: Permeability; 5762: Pore water pressure; 5938: Porosity; 9064: Quick; 5544: Strength (mater); 5203: Swelling (soil); 6722: Temperature; 5933: Thickness
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00367175
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Dec 30 1982 12:00AM