This project is the most expensive and technically complex undertaking in OHIO DEPARTMENT OF TRANSPORTATION (ODOT) history. It is the final link in the Steubenville bypass program. The roadway is functionally classified as an urban expressway with a design average daily traffic of 44,060 vehicles per day. The narrow right-of-way is bounded to the east by a railroad and the Ohio River, and to the west by a steep hillside. A plateau at the slope's crest is occupied by a university and a public park. Varied site geology combined with the limited R/W required unique design and construction methods. The 1.3 mile facility incorporates eight retaining walls. Six of the retaining walls are tieback walls. This paper will focus on the design and construction of Retaining Wall No. 5. Retaining Wall No. 5 is one of the largest tieback retaining walls in the world. It is 2800 feet long and at its full height consists of four tiers totaling 130 feet. The wall utilizes 2139 strand-type tiebacks with capacities of up to 245 kips and free lengths as long as 115 feet. The geology of the site, with its soil, sandstones, shales, and coals of the Conemaugh Formation, of the Pennsylvanian Age, and the steepness of the hillside presented challenges to construction. A pressure relief tunnel system was constructed in conjunction with the wall. Drain holes, drilled through the crown, and uphole piezometers are used to reduce and to monitor groundwater pressures, respectively, on the tieback wall system. The pressure relief tunnel system allowed tieback requirements to be reduced by approximately 50 percent, and this represented a net savings of about $4 million. (A) For the covering abstract see IRRD 873033.


  • English

Media Info

  • Features: References;
  • Pagination: p. 315-27

Subject/Index Terms

Filing Info

  • Accession Number: 00712391
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 90-5410-343-4
  • Files: ITRD
  • Created Date: Oct 24 1995 12:00AM