Assessment of Micropile-Supported Integral Abutment Bridges

Integral abutment bridges (IABs) are the preferred method of construction by Maine Department of Transportation (DOT) and other transportation agencies throughout the United States due to their durability and reduced upfront and life-cycle costs. Shallow bedrock, commonplace at bridge sites throughout the state of Maine, has precluded the use of conventional driven pile foundations and IABs in some instances. Micropiles are an attractive foundation alternative at shallow bedrock sites where conventional foundation systems (e.g. driven piles) cannot develop sufficient length to achieve fixity and/or adequate geotechnical resistance. These foundation elements can be installed through challenging glacial geology, including boulder material and bedrock. Currently, there is no guidance on the design of micropile-supported IABs, or long-term instrumentation data capturing their performance. The objective of this study is to develop a design methodology and engineering recommendations for the structural and geotechnical design of micropiles for IABs, and to demonstrate that micropiles satisfy strength and stability requirements for IAB applications when shallow bedrock is present.

Language

  • English

Project

  • Status: Active
  • Funding: $186480
  • Contract Numbers:

    69A3551847101

  • Sponsor Organizations:

    Maine Department of Transportation

    Research Division, Child Street, 16 State House Station
    Augusta, ME  United States  04333-0016

    Transportation Infrastructure Durability Center

    University of Maine
    Orono, ME  United States  04469

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590

    ADSC-IAFD

    Southlake, Texas  United States 
  • Managing Organizations:

    Maine Department of Transportation

    Research Division, Child Street, 16 State House Station
    Augusta, ME  United States  04333-0016

    Transportation Infrastructure Durability Center

    University of Maine
    Orono, ME  United States  04469

    University of Maine, Orono

    Department of Civil and Environmental Engineering.
    5717 Corbett Hall
    Orono, ME  United States  04469-5711
  • Performing Organizations:

    University of Maine, Orono

    Department of Civil and Environmental Engineering.
    5717 Corbett Hall
    Orono, ME  United States  04469-5711

    Transportation Infrastructure Durability Center

    University of Maine
    Orono, ME  United States  04469

    Maine Department of Transportation

    Research Division, Child Street, 16 State House Station
    Augusta, ME  United States  04333-0016
  • Principal Investigators:

    Davids, Bill

    Gallant, Aaron

  • Start Date: 20190901
  • Expected Completion Date: 20230630
  • Actual Completion Date: 0
  • USDOT Program: University Transportation Centers Program

Subject/Index Terms

Filing Info

  • Accession Number: 01730653
  • Record Type: Research project
  • Source Agency: Transportation Infrastructure Durability Center
  • Contract Numbers: 69A3551847101
  • Files: UTC, RIP
  • Created Date: Feb 7 2020 10:43AM