Hyperautomation and AI/ML: A Strategy for Digital Transformation Success.pdf
STABILITY ANALYSIS OF THE VAIONT LANDSLIDE
1. STABILITY AND MOTION ANALYSIS
OF THE VAIONT SLIDE
Oldrich Hungr
University of British Columbia, Canada
(ohungr@eos.ubc.ca)
2. Old technology: Method of Slices
General method:
1) Work out the equilibrium of each slice
2) Calculate the equilibrium of the slice assembly
3) Results depend on assumptions regarding the
interslice force X (mobilization of internal strength)
21. 3D flexible block
model (Aaron, 2013)
Assumptions:
1) Differential movement
of columns is
permitted in the
vertical direction but
not in the horizontal
plane.
2) No shear stress on
column faces
29. Conclusions:
1) Landslide was highly asymmetric
2) Internal strength contributed to the stability of typical
sections, to a limited extent
3) The structural constraint on the right flank was
important
4) Cohesion of the intact rock mass played an
important role, but is difficult to quantify
5) The speed of the landslide is not difficult to explain
and was due largely to the loss of cohesion in the
interior and in the side constraint
6) The slide may have been slower than assumed
7) A two-stage failure mechanism is very plausible
30. REFERENCES
Hendron, A.J. and Patton, F.D. (1985) - The Vaiont Slide, a Geotechnical Analysis Based on New Geologic Observations
of the Failure Surface. Technical Report GL- 85-5, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS.
I, II.
Hoek, E. (1997) - General 2-dimensional slope stability analysis. Analytical and Computational Methods in Engineering
Rock Mechanics, 95-128, E.T. Brown, Ed., Allen and Unwin, London.
Hungr, O., Salgado, F.M. and Byrne, P.M. (1989) - Evaluation of a three-dimensional method of slope stability analysis.
Canadian Geotechnical Journal, 27: 679-686.
Romero, S.U. and Molina, R. (1974) - Kinematic aspects of the Vaiont Slide. Proceedings, 3rd. Congress
ISRM, Denver, Colorado, 2:865-870.
Selli, R., Trevisan, L., Carloni C.G., Mazzanti, R. and Ciabatti, M. (1964) - La Frana delVajont. Giornale di Geologia. serie
20, XXXII (I), 1–154.
Superchi, L. (2011) - The Vajont rockslide: new techniques and traditional methods to re-evaluate the catastrophic event.
Ph.D. Thesis, University of Padova, 188p.
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