THE BOURGET DU LAC SEWER; TREATMENT BY FREEZING WITH LIQUID NITROGEN

LE COLLECTEUR D'ASSAINISSEMENT DU BOURGET DU LAC : TRAITEMENT PAR CONGELATION A L'AZOTE LIQUIDE

THE UPSTREAM PART OF THE SEWER IS A 2,90 X 2,80 GALLERY. DURING THE EXCAVATION OF THIS GALLERY, IT WAS NECESSARY TO TRAVERSE A LAYER OF FLOWING SILT SATURATED WITH WATER FOR ABOUT 25 M, WITH THE KNOWLEDGE THAT THIS LAYER PROGRESSIVELY ROSE TOWARDS THE ROOF OF THE TUNNEL AND OVERLAID AN IMPERMEABLE MARL SUBSTRATUM. THE SOLUTION ADOPTED WAS TO FREEZE WITH LIQUID NITROGEN AN ARCH OF 0.70 M THICKNESS AROUND THE CROWN, SIDES AND INVERT OF THE GALLERY AND FIXED INTO THE IMPERMEABLE MARL. THE PAPER GIVES THE PRINCIPLE OF FREEZING USING LIQUID NITROGEN AND ITS APPLICATION TO THE EXCAVATION OF THE GALLERY.

Language

  • French

Media Info

  • Pagination: 22-4
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01296843
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Nov 21 2010 6:06AM