THE DRAINAGE GALLERY OF THE LAC DU BOURGET

LA REALISATION DE LA GALERIE D'ASSAINISSEMENT DU LAC DU BOURGET

The authors discuss: (1) the characteristics of the drainage operation; (2) the methods of construction of the gallery; (3) the adaptation of the methods to the formations through which the gallery is built. The principles on which the drainage operation is based are outlined, catchment of the water from the drainage station in Chambery, aix-les-bains and le bourget and its evacuation outside the catchment area of the lake by means of a tunnel drilled through the Chat Mountain Range. Brief details are given of the structure, its geological environment (from east to west quarternary terrain consisting of river and lacustral alluvium and marl moraine, soft Tertiary sandstone, sandstone formations with a high silica content, the Jurassic rocks of the chat Mountain Range, a complex system of the Miocene era comprising sand and conglomerates, and the Jurassic system of Mount Tournier). Two techniques were used: (1) conventional blasting technique to progress through limestone formations with support by means of bolts or metal centerings, and (2) a new method using a drilling machine working at one point, the support consisting of self-bearing mesh and shotcrete through the soft Tertiary sandstone. For the construction through the alluvial terrain. Two techniques were used: the freezing process and consolidation process by means of injection. (TRRL)

  • Corporate Authors:

    Federation Nationale des Trav Publ & des Synd Aff

    6 Avenue Pierre Premier de Serbie
    Paris 16e,   France 
  • Authors:
    • Koenig, J C
    • Guilloud, M
    • SCHWENZFEIER, A
  • Publication Date: 1979-7-8

Language

  • French

Media Info

  • Features: Figures; Photos; References;
  • Pagination: p. 55-59
  • Serial:
    • Travaux
    • Issue Number: 533
    • Publisher: Federation Nationale des Trav Publ & des Synd Aff

Subject/Index Terms

Filing Info

  • Accession Number: 00324617
  • Record Type: Publication
  • Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
  • Report/Paper Numbers: No: 533-534
  • Files: ITRD, TRIS
  • Created Date: Oct 28 1981 12:00AM