Details are given of some of the work being undertaken with the aid of British rigs on the scheme that will add 41 km of railway track extensions. The rigs are excavating diaphragm walls on 14 km of cut-and-cover tunnel construction. In the inherently unstable subsoil with its high water table and comprising 80% water and clay, the cut-and-cover construction is being carried out between diaphragm walls - a technique adopted in the building of the earlier metro sections. Design of the underground sections is based on a flotation equilibrium principle for the "box" that will contain the tracks and train. The description of the construction details is illustrated by means of a number of photographs of different stages of the process. A brief note is also included on the construction of the elevated lines. With predictions that the city's population is expected to treble by the year 2000, plans are in hand for further extensions to extend the metro system again, to a total of 250 km.

  • Availability:
  • Corporate Authors:

    Foundation Publications Limited

    7 Ongar Road
    Brentwood CM15 9AU, Essex,   England 
  • Authors:
    • Patey, D R
  • Publication Date: 1980-4

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 31-34
  • Serial:
    • Volume: 13
    • Issue Number: 3
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00323357
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Jan 19 1981 12:00AM