THE BRIDGE PROTECTION PROGRAM : CALIFORNIA INSTALLS AN AGGRESSIVE SEISMIC RETROFIT EFFORT

This article describes the California Department of Transportation (Caltrans) seismic upgrade program for the seven of the nine toll bridges it operates in the state. The Toll Bridge Seismic Retrofit Program is currently authorized at nearly $5.1 billion. It was inspired by the 1989 and 1994 earthquakes that struck the region. The seven bridges involved in the program are the northern California bridges: Benicia-Martinez, Carquinez, San Francisco-Oakland Bay Bridge, Richmond-San Rafael, and the San Mateo-Hayward. In addition, there are the San Diego-Coronado and Vincent Thomas Bridges in southern California. Five of the seven bridges have been completed, with the Richmond-San Rafael and San Francisco-Oakland bridges remaining. Among the challenges the agency and its partners have had to handle are variable soils and foundations, seismic forces nearly 10 times what was originally designed for, aged structures, conflicts with utilities, airspace concerns, handling of hazardous waste and protecting sensitive environmental resources. The article describes different key aspects of the various projects. For example, the Richmond-San Rafael Bridge was one of the most complex marine foundation retrofit projects ever undertaken on a bridge structure. The San Francisco-Oakland Bay Bridge is comprised of two spans that each requires a separate angle of attack. There are four major structural elements: the foundations in San Francisco Bay, the anchorages, the towers and the superstructure. The article describes how contracts were designed to maximize participation and speed completion

  • Availability:
  • Supplemental Notes:
    • Page range: pp 18-20, 64
  • Corporate Authors:

    Scranton Gillette Communications

    380 E Northwest Highway, Suite 200
    Des Planes, IL  United States  60016-2282
  • Authors:
    • Schurr, A
  • Publication Date: 2005-5

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01001782
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: Jul 7 2005 12:00AM