RETAINING WALL BUILT DOWNWARD ADVANCES COMPLETION TIME

The building is described of a 17-ft.-high, 680.-long retaining wall in 3 months. The construction which took 1/3 less time and 1/2 the cost of a more conventional approach, resulted in a uniformly thick (5-1/2 in.) wall that was anchored to 23-ft-long concrete caissons tied back 32 ft. into the hillside. Thirty-inch diameter reinforced concrete caissons were drilled along the wall line 8 ft. c-c to a depth of 5 ft. below finished grade, and 1-ft. thick friction tiebacks were installed over the center line of each caisson. The latter were tested to 200 percent of design load. About 3 ft. behind the caissons, 1-ft.-dia. drain shafts were drilled 16 ft c-c and filled with gravel. These were tapped at the grade with drain pipes. Starting at one end of the wall and excavating sequentially, 150-ft. sections were opened to depths of 6 to 8 ft. Steel crews then installed a rebar curtain between caissons, tying steel to the caisson 12 in. c-c vertically with expansion holders. Granite concrete was then applied pneumatically to the reinforcing steel forming the wall directly against the hillside cut. Three-in. wide vertical expansion joints were filled with premolded asphalt.

  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Authors:
    • Drossel, M R
  • Publication Date: 1976-5

Media Info

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Filing Info

  • Accession Number: 00141075
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 6 1976 12:00AM