EXCAVATING AND LINING THE SONNENBERG TUNNEL

DETAILS ARE GIVEN OF METHODS USED FOR THE CONSTRUCTION OF THE SONNENBERG TUNNEL WHICH CONSIST OF TWO INTER-CONNECTED 2-LANE TUBES RUNNING BETWEEN THE SENTI FORK AND THE GROSSHOF JUNCTION, A DISTANCE OF ABOUT 1.53M, ON THE N2 NATIONSTRASSE IN SWITZERLAND. BECAUSE OF THE DENSITY OF THE SURROUNDING BOULT-UP AREA, IT WAS DECIDED TO DRIVE THE TUNNEL MECHANICALLY USING A NEW TYPE OF DRILLING EQUIPMENT WHICH IS ALMOST NOISELESS AND VIBRATION - FREE. USING THE EQUIPMENT, A PILOT TUNNEL OF 3.5M, DIAMETER IS DRILLED ON THE TUNNEL CENTRE AND THEN ENLARGED IN TWO STAGES. THE TWO ELECTRO-HYDRAULIC MACHINES ALTHOUGH COMBINED IN ONE UNIT, OPERATE LATERNATELY. DETAILS ARE ALSO GIVEN OF METHODS USED TO SEAL THE TUNNEL TUBES USING PVC-FOIL INSULATION. THE TUNNEL IS EXPECTED TO BE IN USE BY THE END OF 1975. /TRRL/

  • Availability:
  • Corporate Authors:

    Morgan-Grampian Limited

    30 Calderwood Street
    London SE18 6QH,   England 
  • Authors:
    • Bensch, E
  • Publication Date: 1973-9

Language

  • English

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: p. 443-51
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00236860
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Jul 22 1974 12:00AM