Accession Number:

AD0748030

Title:

Stress and Strains around a Cylindrical Tunnel in an Elasto-plastic Material with Dilatancy

Descriptive Note:

Technical rept.

Corporate Author:

HENDRON (ALFRED J) MAHOMET IL

Report Date:

1972-09-01

Pagination or Media Count:

85.0

Abstract:

In the report an elasto-plastic solution is given for determining the stresses, strains, and displacements around a circular tunnel in rock. The relationship between the principal stresses in the plastic zone are determined by the Coulomb-Navier failure criteria and the concept of normality is used to relate the plastic strains to the yield surface. The normality concept results in a dilatancy of the material at yielding when the angle of shearing resistance of the material is greater than zero. Thus the displacements calculated by the method given in this report include the effect of dilantancy in the yielded zone around the tunnel. The results of the study are presented in graphical form which enable a wide variety of problems to be solved by hand without the use of a digital computer.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE