THREE-DIMENSIONAL SLOPE STABILITY ANALYSIS METHOD

After acknowledging some discrepancies noted by Azzouz and Baligh, the author emphasizes that, since the paper presented was the first general three-dimensional stability analysis method, premature conclusions should not be drawn. While forces are important in two-dimensional analysis, and it is thus logical to assume that they are important in three-dimensional analysis, such considerations were beyond the scope of the paper. Apropos of Steiner's proposal to compute the normal forces by equating them vectorially to the component of the weight perpendicular to the intersection of the two sliding planes of a wedge, the author notes that it is unrealistic since it assumes that the normal forces will approach infinity, which is not the case with wedges in both soil and rock. The author concludes by noting that, while careful consideration must be given to the limitations of any approximate or general method, any reasonable three-dimensional geometrical configuration of slope, landslide, or bearing capacity problem can be described with the method. It can be used with the ordinary method of slices assumption (no side forces on vertical sides of soil columns) to determine the normal stresses, or the normal stresses can be determined independently by e.g. finite element analysis. Furthermore, the paper gives expressions for strike and dip, allowing for the first time a simple determination of the orientation of the normal force in three-dimensional geometry.

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  • Accession Number: 00196141
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 14549 Proceeding
  • Files: TRIS
  • Created Date: Oct 17 1979 12:00AM