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Design and performance verification of UHPC piles for deep foundations.
  • Published Date:
    2008-11-01
  • Language:
    English
Filetype[PDF-10.32 MB]


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Design and performance verification of UHPC piles for deep foundations.
Details:
  • Publication/ Report Number:
    IHRB Project TR-558
  • Resource Type:
  • Geographical Coverage:
  • OCLC Number:
    779923253
  • Edition:
    Final report.
  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-HIGHWAY/ROAD TRANSPORTATION-DesignNTL-HIGHWAY/ROAD TRANSPORTATION-Materials ; NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ;
  • Format:
  • Abstract:
    The strategic plan for bridge engineering issued by AASHTO in 2005 identified extending the service life and optimizing structural

    systems of bridges in the United States as two grand challenges in bridge engineering, with the objective of producing safer bridges that

    have a minimum service life of 75 years and reduced maintenance cost. Material deterioration was identified as one of the primary

    challenges to achieving the objective of extended life. In substructural applications (e.g., deep foundations), construction materials such

    as timber, steel, and concrete are subjected to deterioration due to environmental impacts. Using innovative and new materials for

    foundation applications makes the AASHTO objective of 75 years service life achievable. Ultra High Performance Concrete (UHPC)

    with compressive strength of 180 MPa (26,000 psi) and excellent durability has been used in superstructure applications but not in

    geotechnical and foundation applications. This study explores the use of precast, prestressed UHPC piles in future foundations of

    bridges and other structures. An H-shaped UHPC section, which is 10-in. (250-mm) deep with weight similar to that of an HP10×57

    steel pile, was designed to improve constructability and reduce cost. In this project, instrumented UHPC piles were cast and laboratory

    and field tests were conducted. Laboratory tests were used to verify the moment-curvature response of UHPC pile section. In the field,

    two UHPC piles have been successfully driven in glacial till clay soil and load tested under vertical and lateral loads. This report

    provides a complete set of results for the field investigation conducted on UHPC H-shaped piles. Test results, durability, drivability, and

    other material advantages over normal concrete and steel indicate that UHPC piles are a viable alternative to achieve the goals of

    AASHTO strategic plan.

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