DALLAS CITY PLACE

This paper describes the construction of the mined underground section on the starter network for DART (Dallas Area Rapid Transit). The contract comprised a total of 10 km of 6.5 m diameter twin tube running tunnel and the excavation of two large underground metro stations. A full face tunnel boring machine (TBM) was used. The excavation was through good quality chalk. However, open joints in the chalk had become filled with gasoline fuel and toxic cleaning solvents. Methane was also a problem. Details are provided about how the contractors dealt with these problems. Details are also provided of: a) the record TBM tunnelling rates; b) the continuous conveyor mucking method; and c) the cofibrillated polyfibre shotcrete used in the tunnel lining, which eliminated the need for a top coat of plain shotcrete. Details are also provided of the design for the Cityplace station and its excavation. Glass fibre rockbolts were used during construction of the station.

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  • Corporate Authors:

    THE MINING JOURNAL LTD

    60 WORSHIP STREET
    LONDON,   United Kingdom  EC2A 2HD

    THE MINING JOURNAL

    60 WORSHIP STREET
    LONDON,   United Kingdom  EC2A 2HD
  • Authors:
    • Wallis, S
  • Publication Date: 1994-5

Language

  • English

Media Info

  • Features: References;
  • Pagination: N29,N31,N33
  • Serial:
    • WORLD TUNNELLING
    • Volume: 7
    • Issue Number: 4
    • Publisher: THE MINING JOURNAL LTD
    • ISSN: 0956-8700

Subject/Index Terms

Filing Info

  • Accession Number: 00665321
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Sep 9 1994 12:00AM