Design and Performance of Micropile Supported Integral Abutment Bridges

There is little to no guidance on the design of micropiles (or end-bearing variation thereof) supporting fully integral abutment bridges (IABs), and no known performance data. A design methodology for the structural and geotechnical design of micropile-supported IABs is needed. Specific guidance is sought on (1) the acceptability of plastic hinges, which current H-pile supported IAB design practices permit, and (2) geotechnical resistance for an end-bearing variation of the micropile. The objective is to demonstrate micropiles satisfy strength and stability requirements for IAB applications when shallow bedrock is present, and adhere to the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design Specifications. This work will include: Literature search and review of structural and geotechnical design requirements for micropiles in Sections 5, 6 and 10 of the AASHTO LRFD Bridge Design Specifications; analytical/numerical analyses of micropiles in conjunction with loadings and demands of IABs; confirmation and/or refinement of numerical analyses through field instrumentation to verify adequacy of micropiles in IAB applications.

• Supplemental Notes:
  • Contract to a Performing Organization has not yet been awarded.

Language

• English

Project

• Status: Completed
• Funding: $130000
• Sponsor Organizations:

  Maine Department of Transportation

  16 Statehouse Station
  Augusta, ME  United States  04333
• Performing Organizations:

  Transportation Infrastructure Durability Center

  University of Maine
  Orono, ME  United States  04469
• Principal Investigators:

  Gallant, Aaron

• Start Date: 20180301
• Expected Completion Date: 0
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Bridge design; Geotechnical engineering; Hinges; Jointless bridges; Load and resistance factor design; Numerical analysis; Support piles
• Identifier Terms: AASHTO LRFD Bridge Design Specifications
• Subject Areas: Bridges and other structures; Design; Highways;

Filing Info

• Accession Number: 01656938
• Record Type: Research project
• Source Agency: Maine Department of Transportation
• Files: RIP, STATEDOT
• Created Date: Jan 22 2018 10:51AM