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Design and Performance of Micropile Supported Integral Abutment Bridges

项目名称：	Design and Performance of Micropile Supported Integral Abutment Bridges
摘要：	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.
状态：	Programmed
资金：	130000
资助组织：	Maine Department of Transportation
开始时间：	20180301
预计完成日期：	0
实际结束时间：	0