GUIDED SHIELD USED FOR SUBWAY THRUST JOB

This article describes the thrust boring technique which enables pipes, pedestrian subways, etc to be installed across main roads and railways without interruption or disturbance to traffic while work proceeds. An example of the method is given in which two pilot bores were driven through from the main thrust pit to the reception pit. The lower halves of the tubes were filled with concrete into which rail lines were embedded; the lines acted as guides for the shield and precast concrete units which form a pedestrian subway under the A13 London-Tilbury trunk road. Every precast unit was coated on the outside with a bentonite/water slurry to reduce friction during the thrusting operation. /TRRL/

  • Availability:
  • Corporate Authors:

    Foundation Publications Limited

    7 Ongar Road
    Brentwood CM15 9AU, Essex,   England 
  • Publication Date: 1971-5

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 32-33
  • Serial:
    • GROUND ENGINEERING
    • Volume: 4
    • Issue Number: 3
    • Publisher: EMAP CONSTRUCT LIMITED
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00083855
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: May 29 1975 12:00AM