The discusser points out that the theory developed by the authors is valid only for linear elastic materials, and the comparison of theoretical and experimental results does not appear to be correct. It has been shown that for relatively small heights of fill, the effects of boundary conditions are significant. The influence of slippage at the medium-cylinder interface (which has been neglected in this analysis) must at least be qualitatively included in the determination of load distributions around cylindrical inclusions. Comments are made on the figures and graphs presented to illustrate variations in radial stresses, and on the observations made on the field stress ratio. It is noted that field stress ratio has a significant influence on the radial loads acting on inclusion, but this is a parameter which depends upon the assumed, elastic material properties and is normally not controllable externally. In the tunnel and mining problems encountered in practice, the field stress versus vertical load ratio will not in general, be less than 0.5. The effects of this ratio on loads will be governed by the medium-inclusions interaction and the relative stiffness of the two. It is emphasized that the soil is not a linear elastic medium, the effect of soil nonlinearity on stress distributions around buried inclusions must, therefore, be taken into account. This effect has been shown to be significant in the case of shallow-buried, rigid circular pipes.

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00080530
  • Record Type: Publication
  • Report/Paper Numbers: Proc. Paper 10897
  • Files: TRIS
  • Created Date: Feb 27 1975 12:00AM