Behavior of Lined Openings in Jointed and Unjointed Model Rock Masses

Abstract

Three of the tests were conducted on virgin jointed model rock masses containing steel-lined cylindrical openings. The other three tests were repeated loadings of an unjointed model rock mass containing a steel-lined opening. The boundary conditions were approximately plane stress conditions in all cases. The development of jointed model rock masses and the required instrumentation are also described herein. The behavior of the steel liners was measured with circumferential strain gages and diametric extensometers. The free-field response was measured with SE-type stress gages. Test results indicated that even widely spaced joints drastically influence the moments and diametrical movements of the tunnel liner, but that the thrust is not so grossly affected.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1973
Accession Number
AD0767543

Entities

People

  • James G. Wallace

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Bending Moments
  • Construction
  • Elastic Properties
  • Instrumentation
  • Measurement
  • Modulus Of Elasticity
  • Overpressure
  • Pressure Distribution
  • Pressure Measurement
  • Radial Stress
  • Static Tests
  • Stiffness
  • Strain Gages
  • Stress Strain Relations
  • Tensile Strength
  • Test Facilities
  • Triaxial Stresses

Readers

  • Geotechnical Engineering.
  • Mechanical Engineering/Mechanics of Materials.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster