It is described how contractors are trying a new technique to prevent more water from entering two underground stations on the Los Angeles Metro Rail Red Line. Because of methane and hydrogen sulfides gases in the soil, the tunnels and stations are lined with an impervious membrane which was found to allow water seepage. A test program is planned when bentonite slurry will be injected from above ground. Bentonite will be injected into the soil in stages to create a 6-ft to 8-ft-diameter semicircular canopy across the top of the concrete tuunnel.

  • Availability:
  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Publication Date: 1992-3-9

Media Info

  • Pagination: p. 12
  • Serial:
    • ENR
    • Volume: 118
    • Issue Number: 10
    • Publisher: McGraw-Hill, Incorporated
    • ISSN: 0891-9526

Subject/Index Terms

Filing Info

  • Accession Number: 00620869
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 31 1992 12:00AM