ROSSLYN STATION, VIRGINIA: GEOLOGY, EXCAVATION AND SUPPORT OF A LARGE, NEAR SURFACE, HARD ROCK CHAMBER

The large chamber was excavated in hard rock by conventional drill-and-shoot methods and supported with steel ribs and shotcrete. The station design, based on a moderate amount of subsurface information, was proven well suited to the actual rock conditions encountered. Although some problems were anticipated with jointed, large rock blocks, these problems were minimized by using drilled-in-spile bars in the crown and rock bolting in the sidewalls. It can only be concluded that the station design was compatible with the geologic conditions expected which were hard, blocky rock and tight joints. These factors permitted excavation and support of the opening without serious loss of ground, settlement of the surface street, or other adverse incident.

Media Info

  • Pagination: p. 1373-91
  • Serial:
    • Volume: 2

Subject/Index Terms

Filing Info

  • Accession Number: 00129111
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: Proc Paper
  • Files: TRIS
  • Created Date: Feb 19 1981 12:00AM