A NEW WAY TO SPRAY ON TUNNEL LINING

A NEW METHOD OF SPRAYING CONCRETE FOR TUNNEL LININGS IS BEING USED ON THE RAILROAD TUNNEL IN VANCOUVER, B. C. IT DIFFERS FROM SHOTCRETING IN SEVERAL WAYS. LARGER AGGREGATES CAN BE USED. THE DRY MIX IS DELIVERED TO THE NOZZLE BY COMPRESSED AIR, AT WHICH POINT THE WATER IS ADDED AND ADJUSTED BY A VALVE. THE CONCRETE CAN BE SPRAYED WHILE THE DRIVING OF THE TUNNEL IS IN PROGRESS. ROCK FACES WHICH CAN NOT BE REACHED AT THE FIRST APPLICATIONS CAN BE TREATED LATER WITH THE ADDITION OF A QUICK-SETTING POWDER, THE CONCRETE CAN BE MADE TO ADHERE TO OVERHEAD LOCATIONS, EVEN WHEN THEY ARE DAMP. THE METHOD WAS DEVELOPED IN SWITZERLAND AND HAS BEEN USED IN EUROPE FOR MORE THAN FOUR YEARS. /AUTHOR/

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  • Corporate Authors:

    N/A

    ,   USA 
  • Publication Date: 1967-4-10

Language

  • English

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Filing Info

  • Accession Number: 00212396
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 29 2004 6:32PM