SPANS ACROSS THE MISSISSIPPI : TWIN BRIDGES REPLACE AILING STRUCTURE, ADD LANES ACROSS RIVER NEAR TWIN CITIES

This article profiles the Wakota Bridge construction project in which twin long-span, cast-in-place, segmental concrete bridges will span the Mississippi River near Minneapolis, Minnesota. The project, which is scheduled for completion in 2007, is intended to replace the existing bridge that has a tied-arch main span and was built in the 1960s. It will also add lanes to accommodate traffic growth. A computer model of the bridge was developed to ensure that the independently constructed sections of bridge would align properly during the closure operations. The model was designed to analyze the planned construction sequence and schedule. Bridge size and construction materials are detailed, as well as river and highway commerce design restrictions such as minimum clearance and width. The article describes the construction of the superstructure and gives metrics for compressive strength, substructure concrete thickness and post-tensioning steel specifications. A timeline of the project is included, and complications encountered along the way are described. Concerns regarding the durability of post-tensioned concrete bridges due to corrosion and poor grouting led to improvements. These included the use of prepacked grout, improved workmanship and quality control, and the use of temporary corrosion inhibitors.

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  • Corporate Authors:

    Scranton Gillette Communications

    380 E Northwest Highway, Suite 200
    Des Planes, IL  United States  60016-2282
  • Authors:
    • Towell, P J
  • Publication Date: 2005-3

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00989407
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: May 3 2005 12:00AM