The Variation of the Angle of Internal Friction With Size Consist for Mechanically-Chipped Material

Abstract

In order to improve aspects of materials handling in the rapid excavation process, research is underway to characterize the muck from mechanical tunnel boring machines. The specific project involves the correlation of the angle of internal friction, phi, to the size consist, often termed gradation, of this mechanically-chipped material. Existing references demonstrate that this angle depends upon mineral type, and for a given mineral type upon size of particles. Particle shape is usually a function of mineralogical character and is not as important a parameter in influencing this angle. Seven samples collected from tunnels located throughout the U.S. have been analyzed for gradation.

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Document Details

Document Type
Technical Report
Publication Date
May 06, 1972
Accession Number
AD0745286

Entities

People

  • Donald E. Raab
  • Lee W. Saperstein

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Chemical Analysis
  • Data Analysis
  • Earth Sciences
  • Equations
  • Geography
  • Internal Friction
  • Load Cells
  • Materials
  • Materials Handling
  • Mechanics
  • Particle Size
  • Particles
  • Pore Pressure
  • Power Supplies
  • Statistical Analysis
  • Test Methods
  • United States

Readers

  • Geotechnical Engineering.
  • Systems Analysis and Design