Sophisticated stabilizing techniques were used overcome a handicap of only 8 feet of sandy soil above the crown when driving a tunnel for golf carts under the Pacific Coast Highway in Newport Beach California. Since the highway could not be disturbed, a system was devised to drive 22 spiles - horizontal pipes - along the crown of the 160-ft long tunnel using a remote controlled directional boring machine. Because the pipes are located on 12-in. centers, the boring machnine was carefully guided from the surface by an electronic locator. Details of the operation are briefly described. It is believed that the technique may be applicable for other tunneling problems.

  • Availability:
  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Publication Date: 1991-7-29

Media Info

  • Pagination: p. 19
  • Serial:
    • ENR
    • Volume: 227
    • Issue Number: 4
    • Publisher: McGraw-Hill, Incorporated
    • ISSN: 0891-9526

Subject/Index Terms

Filing Info

  • Accession Number: 00611167
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 31 1991 12:00AM