TWIN BORES AT GREEN RIVER

A ROCK MECHANICS INVESTIGATION WAS CONDUCTED CONCURRENTLY WITH THE CONSTRUCTION OF TWIN TUNNELS ON THE GREEN RIVER MARGINAL ROUTE. THIS INVESTIGATION WAS CONDUCTED TO DETERMINE' /1/ THE ACTUAL SUPPORT REQUIREMENTS BY MEASUREMENT OF THE TIME-STRAIN-LOAD PROPERTIES OF THE TUNNEL ROCK AND /2/ THE MODE OF LOADINGS /THE PROCESS BY WHICH ROCK STRAIN IS TRANSLATED INTO LOAD IN THE SUPPORT SYSTEM/. FOUR INSTRUMENT STATIONS EACH CONSISTING OF FOUR LOAD MEASURING INSTRUMENTS /PROP LOAD CELLS WHICH MEASURE THE AMOUNT OF STRAIN ON THE INITIAL STEEL STRUCTURE/ AND THREE DISPLACEMENT MEASURING INSTRUMENTS WERE INSTALLED. THE INVESTIGATION WAS DESIGNED TO PROVIDE A CONTINUING REVIEW OF ORIGINAL DESIGN ASSUMPTIONS DURING ACTUAL TUNNEL EXCAVATIONS, TO DEVELOP RECOMMENDATIONS FOR MODIFICATION OF THE ORIGINAL STEEL DESIGN TO CONFORM MORE CLOSELY WITH MEASURED ROCK CONDITIONS, AND TO PROVIDE QUANTITATIVE DATA FOR THE CONTROL OF THE TUNNEL SUPPORT SYSTEM COSTS. THE RESULTS ACHIEVED PROOF THAT ROCK MECHANICS INSTRUMENTATION CAN BE SUCCESSFULLY APPLIED TO REDUCE TUNNEL CONSTRUCTION COSTS AND INCREASE SAFETY.

  • Corporate Authors:

    Wyoming State Highway Department

    Wyoming Construction Report
    Cheyenne, WY  USA 
  • Publication Date: 1966-8

Subject/Index Terms

Filing Info

  • Accession Number: 00228879
  • Record Type: Publication
  • Report/Paper Numbers: 1 Fig
  • Files: TRIS, STATEDOT
  • Created Date: Aug 15 2004 2:10AM