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

• Features: Photos;
• Pagination: p. 38
• Serial:
  • Construction Methods and Equipment
  • Volume: 48
  • Issue Number: 5
  • Publisher: McGraw-Hill, Incorporated

Subject/Index Terms

• TRT Terms: Caissons; Construction; Costs; Design load; Drilling; Reinforced concrete retaining walls; Reinforcing bars; Retaining walls; Shotcrete; Steel; Tiebacks
• Uncontrolled Terms: Anchors; Construction costs; Rebars
• Subject Areas: Bridges and other structures; Construction; Finance; Highways;

Filing Info

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