A BATTERY OF CONTRACTS WEST OF DENVER IS FORGING THE WEST'S TOUGHEST INTERSTATE LINK

Contracts on 18 miles of Interstate 70 between Idaho Springs and Dillon are reviewed. The work is divided into 3 contracts on the eight miles along Clear Creek from Idaho Springs to Empire Junction, and one contract for the 2-mile approach road to the Straight Creek Tunnel site. The Straight Creek Test bore is being studied extensively and intensively, day-by-day and foot-by-foot. Borehole extensometers, load cells and other apparatus are placed at intervals inside the tunnel and the findings will be evaluated. Extensometers are inserted into the probe holes every 200 ft., depending upon rock conditions. Extensometers placed in top probe holes measure downward movement of roci and determine the point at which there is a change from tension in the rock where it tends to fall from the top, to compression and stability. The load cell instruments installed at the bases of sets reveal the actual load exerted upon the members. Other instruments placed on either side of fault zones, provide additional load information which is correlated with the studies on rock movement. Water flow is measured in a control box.

  • Publication Date: 1964-6

Media Info

  • Features: Photos;
  • Pagination: p. 112-118
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00264264
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 9 1975 12:00AM