SLOPE FAILURES DUE TO RAINFALL AND LOSS OF SUCTION. DE MELLO VOLUME; A TRIBUTE TO PROFESSOR DR. VICTOR F. B. DE MELLO IN HONOR OF HIS CONTRIBUTION TO THE DEVELOPMENT OF GEOTECHNICAL ENGINEERING IN LATIN AMERICA

It is a worldwide experience that the maximum frequency of landslides often coincides with heavy rainstorms. Similarly, it is a well established fact that cuts in fine-grained soils may fail some time after excavation. The time delay depends on how fast suction disappears, and to what extent attraction (cohesion) is lost. Back-analyses are carried out for eight actual slides, in cuts, embankments and natural slopes exposed to erosion, and covering a wide range of soils, from natural deposits to compacted soils. In evaluating these case records from various parts of the world, emphasis has been placed on soil behaviour, rather than on refined numerics. A main conclusion drawn from these eight cases is that it is the extreme values of the pore pressure regime that played the predominant role in all these failures. By comparison, uncertainties in effective strength values are of much lesser importance than even moderate seasonal pore pressure changes, except perhaps in small cuts with low effective stress levels. For the covering abstract of this book see IRRD 836508. (Author/TRRL)

  • Corporate Authors:

    Editora Edgard Bluecher LTDA

    Caixa Postal 5450
    Sao Paulo,   Brazil 
  • Authors:
    • Janbu, N
  • Publication Date: 1991

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00617315
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Nov 30 1991 12:00AM