CASE STUDY: TIED-BACK RETENSION, AN INNOVATIVE DESIGN FOR A 50-FOOT HIGH RETAINING WALL

When a design was needed to a 50-foot tall retaining wall, the solution was achieved using the Retension system, a precast concrete fascia with an attached precast concrete box. The box serves as a form for a cast-in-place concrete column. The wall was founded on a cast-in-place footing bearing on competent rock. Reinforced concrete was placed into the "form" made by the precast box. Two-rock anchors cast into the column stabilized the resulting pillar. Above the rock line, galvanized tie strips were added to the back of the fascia and connected to discrete metal reinforcing strips in a granular backfill matrix similar to a Reinforced Earth wall. Advantages of the system to the contractor were cost savings due to the precast fascia units with precast "forms" attached, small footings and little backfill. This system is ideally suited for retaining walls in a rock-cut where only tied-back columns are needed, or partial rock-cut where tie-back columns are used in the lower strata and reinforcing strips in a granular backfill are added in the upper layer with no change in appearance to the fascia.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784407444
• Corporate Authors:

  American Society of Civil Engineers

  Geo Institute, 1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Fordham, F
  • Louis, M
  • Truong, K
• Conference:
  • Geotechnical Engineering for Transportation Projects, Geo-Trans 2004
  • Location: Los Angeles, California
  • Date: 2004-7-27 to 2004-7-31
• Publication Date: 2004

Language

• English

Media Info

• Features: Figures; References;
• Pagination: 9 p.
• Serial:
  • ASCE Geotechnical Special Publication
  • Issue Number: 126
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Anchors (Structural connectors); Backfill soils; Box beams; Cast in place concrete; Columns; Design; Footings; Galvanized metals; Granular materials; Innovation; Mechanically stabilized earth; Precast concrete; Reinforced concrete; Retaining walls; Rocks; Tie bars
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00988684
• Record Type: Publication
• ISBN: 0784407444
• Report/Paper Numbers: Volume II
• Files: TRIS
• Created Date: Apr 18 2005 12:00AM