IN-SITU STRESS IN GRANITE

Abstract

The object of Project 1.6 was to determine principal stress field present in the granite at the Shoal site by measurement of secondary principal stresses in an underground alcove prior to the shot. Secondary principal stresses were calculated from in situ stress relief measurements using the borehole gage overcoring method and biaxial modulus of elasticity determinations made in the Lucius Pitkin, Inc. laboratories. Vertical stresses in boreholes in the granite adjacent to the alcove site were much less than the calculated overburden stress due to gravity. Stresses determined in situ were tectonic. The rock was fractured and faulted to extreme degree.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1964
Accession Number
AD0462256

Entities

People

  • F. H. Wright

Tags

Communities of Interest

  • Air Platforms
  • Biomedical
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Boreholes
  • Contractors
  • Contracts
  • Department Of Defense
  • Diameters
  • Drilling
  • Drills
  • Elastic Properties
  • Government Procurement
  • Governments
  • Indicators
  • Measurement
  • Modulus Of Elasticity
  • Orientation (Direction)
  • Photographs
  • Stresses
  • Tectosilicates

Readers

  • Geotechnical Engineering.
  • Materials Science and Engineering.