Stress Wave Interactions with Tunnels Buried in Well-Characterized Jointed Media.

Abstract

For the DIABLO HAWK underground nuclear test, several small-scale tunnels were constructed in jointed rock simulant material and stress loaded to approximately 0.8 kbar = 11.6 ksi. These tunnel response tests represented an opportunity to evaluate whether successful pre-shot predictions of tunnel closure and block motion could be made for tunnels buried in a well-characterized jointed media. In this report, numerical simulation predictions using computer code techniques which explicitly treat the idealized joints are described and compared to data from the recovered experimental model. The tunnel closure predictions and the predicted locations of block motion are in reasonable agreement with some experimental data. Other aspects of the study included: development and application of an analytical technique for predicting joint activation conditions (i.e., block motions) for specified joint orientations and locations near the tunnel surface, calculations and comparisons of tunnel response to dynamic and quasi-static stress loads, and investigation of the effects of joint friction on tunnel damage. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1980
Accession Number
ADA100698

Entities

People

  • Larry A. Deangelo
  • Martin Rosenblatt

Tags

Communities of Interest

  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Bulk Modulus
  • Constitutive Properties
  • Dynamic Response
  • Experimental Data
  • Materials
  • Mechanical Properties
  • Plastic Properties
  • Scale Models
  • Shear Modulus
  • Shear Strength
  • Shear Stresses
  • Simulations
  • Stress Waves
  • Stresses
  • Tensile Strength
  • Tensile Stress

Readers

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