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.
- Contract to a Performing Organization has not yet been awarded.
- Status: Programmed
Augusta, ME United States 04333
- Start Date: 20180301
- Expected Completion Date: 0
- Actual Completion Date: 0
- TRT Terms: Bridge design; Geotechnical engineering; Hinges; Jointless bridges; Load and resistance factor design; Numerical analysis; Piles (Supports)
- Identifier Terms: AASHTO LRFD Bridge Design Specifications
- Subject Areas: Bridges and other structures; Design; Highways;
- Accession Number: 01656938
- Record Type: Research project
- Source Agency: Maine Department of Transportation
- Files: RiP, STATEDOT
- Created Date: Jan 22 2018 10:49AM