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SOIL FREEZING FOR A TUNNEL PROPULSION, USING THE NATM (NEW AUSTRIAN TUNNELLING METHOD) AND COMPRESSED AIR.

Author(s) : SCHICKL R.

Summary

IN THE CONSTRUCTION OF THE VIENNA UNDERGROUND RAILWAY IT WAS NECESSARY TO BORE TUNNELS BENEATH A TELECOMMUNICATIONS BUILDING. THE WORKING FACE OF THE TUNNELLING MACHINE HAD TO BE WITHIN 1.60 M BENEATH THE BUILDING FOUNDATIONS. TO AVOID SUBSIDENCE, A 1.0 M THICK PAD OF FROZEN SOIL WAS PRODUCED BELOW THE FOUNDATIONS, USING DOUBLE-PIPE FREEZING PROBES FED WITH CALCIUM CHLORIDE BRINE FROM A TWO-STAGE REFRIGERATION L. THE PAD TOOK 15 DAYS TO FREEZE AND REMAINED REFRIGERATED FOR THE 6 WEEKS OF TUNNEL BUILDING. D.W.H.

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Details

  • Original title: SOIL FREEZING FOR A TUNNEL PROPULSION, USING THE NATM (NEW AUSTRIAN TUNNELLING METHOD) AND COMPRESSED AIR.
  • Record ID : 1988-1256
  • Languages: English
  • Source: Development in refrigeration, refrigeration for development. Proceedings of the XVIIth international Congress of Refrigeration.
  • Publication date: 1987/08/24
  • Document available for consultation in the library of the IIR headquarters only.

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