Tunneling through completely weathered granite and other rocks that have been exposed to a subtropical environment is not easy. Hong Kong Mass Transit Railway has been built in three segments through such conditions using a combination of cut-and-cover, drill-and-blast and bored tunnels. In addition to the weathering and erosion, most lines are at right angles to natural drainage and portions are below sea level. Avoiding settlement has been a major problem but has been successfully met. Settlements in sensitive areas have been countered by stabilizing sands by grouting, by packing overbreaks with prepared bags of gravel, and by providing shotcrete support as rapidly as possible.

  • Availability:
  • Corporate Authors:

    Morgan-Grampian (Construction Press) Limited

    Morgan-Grampian House, 30 Calderwood Street
    London SE18 6QH,   England 
  • Authors:
    • Cater, R W
    • SHIRLAW, J N
  • Publication Date: 1985-10

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 25-28
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00454973
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 31 1988 12:00AM