Durability of Modified Helical Piles Under Lateral and Torsional Loads: Embracing Efficient Alternatives to Support Lightweight Transportation Structures (C17.2020)

Modified helical (i.e. screw) piles are lightweight deep foundation elements that are screwed into the ground and efficiently generate geotechnical compressive and uplift resistance by mobilizing the shear strength of soil adjacent to helical plates that are welded to an extendable shaft. The addition of a novel collar vane increases the lateral and torsional resistance of this deep foundation element. Helical piles (HPs) are quick and simple to install, utilizing nonspecialized equipment that is ubiquitous in the United States construction industry, eliminating the need for a specialty contractor. Relative to conventional deep foundation alternatives, HP installation is relatively non-intrusive, less cumbersome, and appreciably less expensive. Lightweight transportation structures are often supported on costly conventional foundation systems that have only been advanced incrementally for decades. Savings that could arise from efficient design of these lightweight facilities may be applied elsewhere as available funding for transportation infrastructure continues to diminish. Moreover, these benefits may not be isolated to new lightweight transportation infrastructure, and benefits from this research may extend to other applications, including retrofits and upgrades to increase the capacity and extend the life of existing foundations required to support new or augmented structures.

Language

  • English

Project

  • Status: Active
  • Funding: $305980
  • Contract Numbers:

    69A3551847101

  • Sponsor Organizations:

    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

    University of Maine, Orono

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

    Helix Mooring Systems, Inc.

    Cumberland, Maine  United States 

    Hubbell Power Systems, Inc.

    Centralia, Missouri  United States 
  • Managing Organizations:

    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

    University of Maine, Orono

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

    Dunn, Denise

  • Performing Organizations:

    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
  • Principal Investigators:

    Bradshaw, Aaron

    Berube, Keith

    Gallant, Aaron P

  • Start Date: 20200901
  • Expected Completion Date: 20221230
  • Actual Completion Date: 0
  • USDOT Program: University Transportation Centers Program

Subject/Index Terms

Filing Info

  • Accession Number: 01851451
  • Record Type: Research project
  • Source Agency: Transportation Infrastructure Durability Center
  • Contract Numbers: 69A3551847101
  • Files: UTC, RIP
  • Created Date: Jul 15 2022 3:50PM