During excavation the amount of water seepage in some places amounted to as much as 325 liters/sec. At first, trials were carried out to fill in the rock fissures by means of silicate injection, but finally a decision was made in favor of a new method of protection, using prefabricated concrete sections to form a primary arch. These reinforced sections have a width of 1m and thicknesses of 20cm at the apex and 40cm at the base. Two sections form an arch.

  • Corporate Authors:

    IPC Building and Control Journals, Limited

    Dorset House, Stanford Street
    London SE1 9LU,   England 
  • Publication Date: 1972-11

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00052117
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Apr 26 1976 12:00AM