The influence of the installation advancement ratio on the cyclic performance of a single-helix pile for floating offshore wind applications

Research output: Contribution to conferencePaperpeer-review

Abstract

Upscaling of screw piles has been proposed for offshore use in foundations and anchors. This upscaling can result in a significant increase in vertical installation forces. Subsequent research has shown that this can be reduced and even eliminated by using over-flighting techniques (installation advancement ratio, AR < 1.0), which can also improve the in-service monotonic uplift performance. In this study, centrifuge tests were conducted to investigate the cyclic and post-cyclic performance of a screw pile installed using conventional pitch-matched (AR = 1.0) and over-flighting approaches. The results suggest that, under the one-way cyclic loading investigated, it is possible to reduce displacement accumulation and capacity degradation of the screw pile with over-flighting (reduced AR) installation. Thus adopting installation processes in sand that are contrary to published guidance can result in economic installation and improved cyclic performance for screw piles in tension which could be deployed as anchors for floating wind.
Original languageEnglish
Pages1218-1224
Publication statusPublished - 12 Sept 2023
Event9th International SUT OSIG Conference “Innovative Geotechnologies for Energy Transition” - Imperical College, London, United Kingdom
Duration: 12 Sept 202314 Sept 2023
https://sut.org/event/osig2023/
http://www.osig2023.com

Conference

Conference9th International SUT OSIG Conference “Innovative Geotechnologies for Energy Transition”
Country/TerritoryUnited Kingdom
CityLondon
Period12/09/2314/09/23
Internet address

Keywords

  • screw pile
  • Cyclic
  • Floating offshore wind turbines

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Engineering
  • Civil and Structural Engineering

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