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
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Contract Numbers:
69A3551847101
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Sponsor Organizations:
Transportation Infrastructure Durability Center
University of Maine
Orono, ME United States 04469Office of the Assistant Secretary for Research and Technology
University Transportation Centers Program
Department of Transportation
Washington, DC United States 20590 Department of Civil and Environmental Engineering.
5717 Corbett Hall
Orono, ME United States 04469-5711 Cumberland, Maine United States Centralia, Missouri United States -
Managing Organizations:
Transportation Infrastructure Durability Center
University of Maine
Orono, ME United States 04469Office of the Assistant Secretary for Research and Technology
University Transportation Centers Program
Department of Transportation
Washington, DC United States 20590 Department of Civil and Environmental Engineering.
5717 Corbett Hall
Orono, ME United States 04469-5711 -
Project Managers:
Dunn, Denise
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Performing Organizations:
Transportation Infrastructure Durability Center
University of Maine
Orono, ME United States 04469 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: 20250531
- Actual Completion Date: 0
- USDOT Program: University Transportation Centers Program
Subject/Index Terms
- TRT Terms: Construction engineering; Lightweight materials; Load tests; Mechanical vanes; Pile foundations; Structural design; Support piles
- Subject Areas: Bridges and other structures; Construction; Design; Materials; Transportation (General);
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