Research and practice in ground support is discussed under three headings: stability of the tunnel heading, lining design, and ground movements and building damage. Many of the developments in these areas have resulted from observations of field performance, in some cases closely coordinated with analytical and laboratory studies. Lining studies conducted by means of destructive testing of models, analytical studies, and field measurements and observations have been used to economize on lining design by taking maximum advantage of the support and passive reaction provided to the lining by the surrounding ground. Support procedures are being developed to interface with tunnel boring machines so that permanent linings can be rapidly installed and provide early support in a variety of tunnel ground conditions. The stability of the tunnel heading is often of more concern than the dimensioning and placement of a permanent lining, particularly where ground conditions are bad or the tunnel is large. Rock displacements are commonly monitored for large deep chambers as well as for the large shallow chambers currently under construction for subways along the east coast of the United States. In several projects, measurements have provided early warning of potentially unstable conditions so that corrective measures could be provided. Ground movements are of primary concern for soft ground tunnels in urban areas. Measurements obtained after each shove of the tunnel shield have provided a means of evaluating the processes causing lost ground so that adjustments can be made in tunnel procedures. Lateral and vertical ground movements have been measured and related to building distortions and damage. /TRRL/

  • Availability:
  • Corporate Authors:

    Pergamon Press, Incorporated

    Headington Hill Hall
    Oxford OX30BW,    

    Pergamon Press, Incorporated

    Maxwell House, Fairview Park
    Elmsford, NY  United States  10523
  • Authors:
    • Cording, E J
  • Publication Date: 1977-12

Media Info

  • Features: Figures; References;
  • Pagination: p. 113-119
  • Serial:
    • Underground Space
    • Volume: 2
    • Issue Number: 2
    • Publisher: Pergamon Press, Incorporated
    • ISSN: 0362-0565

Subject/Index Terms

Filing Info

  • Accession Number: 00174070
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Jun 28 1981 12:00AM