LANDSLIDES AS NATURAL HAZARDS - MECHANISMS AND UNCERTAINTIES

Analyses of slope failure are generally based on the popular concept of limit equilibrium involving a gravitational sliding model. This paper emphasises that many landslides can not be explained on the basis of such a simple model. More importantly consideration must be given to alternative mechanisms of failure development. Herein attention is given both to the basic causes of instability and to factors which may come into play immediately prior to failure. In this paper three broad categories are proposed namely: (I) landslides due to exceptional causes (II) ordinary landslides or failures due to known or usual causes and (III) landslides which occur without any apparent cause. A new approach to the study of rockslide dynamics is proposed. Its application and relevance to rockslides is discussed. Calculations on this basis show that the elm rockslide (and other slides of large size) can be explained on the basis of reasonable values of the coefficient of friction during the sliding part of motion. In general, the proposed analytical approach (based on consideration of released energy) is able to explain (a) increased travel distances of large rockslides in relation to the height of fall and (b) the influence of size of rock mass on the increased travel distance. (TRRL)

  • Corporate Authors:

    Wollongong University, Australia

    Department of Civil Engineering, P.O. Box 1144
    Wollongong, New South Wales,   Australia 
  • Authors:
    • CHOWDHURY, R N
  • Publication Date: 1980

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 63 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00325290
  • Record Type: Publication
  • Source Agency: ARRB
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS
  • Created Date: Aug 15 1981 12:00AM