ANALYSIS OF THE PORE PRESSURE CHANGES FOLLOWING THE EXCAVATION OF A SLOPE

In a numerical analysis the pore pressure changes due to excavation of a slope and the subsequent dissipation of excess pore pressures were calculated. The analytical results of the pore pressure changes due to unloading of a slope agree reasonably well with pore pressure measurements in comparable embankments. This suggests that pore pressures immediately after slope excavation can be predicted analytically in homogeneous materials. The results of an analysis dealing with the dissipation of excess pore pressures due to unloading can also be substantiated by field evidence: however, only few comparable field data are available. For many slopes it can be noted that the time for full dissipation is of the same order of magnitude as the time between excavation and failure. This suggests that many failures might be caused by the delayed equalization of pore pressures. (A) /TRRL/

• Corporate Authors:

  National Research Council of Canada

  1200 Montreal Road
  Ottawa, Ontario  Canada  K1A 0R6
• Authors:
  • EIGENBROD, K D
• Publication Date: 1975-8

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 429-440
• Serial:
  • CANADIAN GEOTECHNICAL JOURNAL
  • Volume: 12
  • Issue Number: 3
  • Publisher: National Research Council of Canada

Subject/Index Terms

• TRT Terms: Decompression; Dissipation; Embankments; Excavation; Excavations; Failure; Forecasting; Landslides; Loading and unloading; Mathematical analysis; Numerical analysis; Pore pressure; Pore water pressures; Slope stability; Slopes; Soil mechanics; Soil stabilization
• Uncontrolled Terms: Modifications; Unloading
• ITRD Terms: 5768: Decompression; 2801: Embankment; 5155: Excavation (process); 5520: Failure; 9048: Modification; 5762: Pore water pressure
• Subject Areas: Energy; Geotechnology; Highways;

Filing Info

• Accession Number: 00132889
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jul 13 1976 12:00AM