THE CLAREMONT TO DANVILLE ROAD TUNNEL

A DESCRIPTION IS GIVEN OF THE DESIGN AND CONSTRUCTION TO THE STAGE REACHED IN FEBRUARY 1970 OF THE 1,880-FT LONG ROAD TUNNEL FROM CLAREMONT TO DANVILLE IN PRETORIA. THE TUNNEL RUNS NORTH TO SOUTH THROUGH THE DASPOORT SYSTEM OF THE PRETORIA SERIES. THE TUNNEL CENTER LINE WAS INVESTIGATED BY PRELIMINARY DRILLING, AND ADDITIONAL SOIL TESTS WERE CONDUCTED AFTER THE APPROACH CUTTINGS HAD BEEN COMPLETED. SOIL TEST RESULTS ARE GIVEN. THE DESIGN ALLOWS FOR TWO TRAFFIC LANES AND TWO FOOT-WALKS, GIVING A TUNNEL WIDTH AT ROAD LEVEL OF 38 FEET. CANOPIES ARE PROVIDED AT EACH TUNNEL ENTRANCE AND A VENTILATION SHAFT IS PROVIDED AT MID- LENGTH OF THE TUNNEL. LIGHT IS TRANSITIONED INTO AND ALONG THE TUNNEL. TUNNEL LIGHT VALUES ARE GIVEN. A DESCRIPTION IS GIVEN OF THE METHOD OF CONSTRUCTION OF THE APPROACH CUTTINGS AND OF DRIVING THE TUNNEL FROM NORTH TO SOUTH. CONSTRUCTION HAS NOT YET COMMENCED ON THE SOUTHERN END OF THE TUNNEL. /RRL(A)/

  • Supplemental Notes:
    • pp 237-241, 4 FIG, 1 TAB
  • Corporate Authors:

    South African Tunnelling Conf

    ,    
  • Authors:
    • Edwards, J H
    • Graham, D R
  • Publication Date: 1970-6

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00235173
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Report/Paper Numbers: pp 81-84
  • Files: TRIS
  • Created Date: Aug 29 1971 12:00AM