Research in Ground Support and Its Evaluation for Coordination with System Analysis in Rapid Excavation

Abstract

A method of predicting subsurface conditions for future tunnel construction is developed. It describes and rates the rock structure on basis of its need for support in close proximity to the working face. The concept, designated the rock structure rating (RSR) utilizes geologic data and information which could be made available for consideration in the pre- construction period. Methods and techniques used in making geological investigations for tunnel construction are discussed. Correlation between predicted RSR values and actual support installation was accomplished by researching 33 case history tunnel projects. A method, called the rib ratio (RR) concept, was developed by which actual steel rib support installations could be compared on a common basis. Numerical relationships between RSR values, RR's steel rib support and rock loads are established.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1972
Accession Number
AD0743100

Entities

People

  • George E. Wickham
  • Henry R. Tiedemann

Tags

Communities of Interest

  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Construction
  • Department Of Defense
  • Economic Analysis
  • Engineering
  • Engineers
  • Groundwater
  • Mechanical Properties
  • Mechanics
  • Petroleum Industry
  • Photographs
  • Photography
  • Physical Properties
  • Rapid Excavation
  • Rock Mechanics
  • Standards
  • Tensile Strength
  • Visual Inspection

Fields of Study

  • Engineering

Readers

  • Analytical Mechanics
  • Explosive Engineering.
  • Systems Analysis and Design