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Centrifuge modelling of screw piles for offshore wind energy foundations
| Content Provider | Scilit |
|---|---|
| Author | Davidson, C. Al-Baghdadi, T. Brown, M. J. Brennan, A. Knappett, J. A. Augarde, C. Coombs, W. Wang, L. Richards, D. J. Blake, A. Ball, J. |
| Copyright Year | 2018 |
| Description | Book Name: Physical Modelling in Geotechnics |
| Abstract | Screw piles (helical piles) can provide a viable, cost-effective and low-noise installation alternative to increasing the size of existing foundation solutions (e.g. monopiles) to meet the demand for the advancement of offshore wind energy into deeper water. Significant upscaling of widely used onshore screw pile geometries will be required to meet the loading conditions of a jacket supported offshore wind turbine. This increase in size will lead to greater installation force and torque. This paper presents preliminary results from centrifuge tests investigating the requirements to install screw piles designed for an offshore wind energy application using specially developed equipment. Results indicate that the equipment is suitable to investigate these screw pile requirements and that significant force is required for such upscaled screw piles, with 19 MN vertical force and 7 MNm torque for the standard design. Optimisation of the screw pile geometry, reduced these forces by 29 and 11% for the vertical and rotational forces respectively. This chapter presents preliminary results from centrifuge tests investigating the requirements to install screw piles designed for an offshore wind energy application using specially developed equipment. Rotating a screw pile into the soil generates large amount of torque from the frictional resistance on the soil-steel interface. The chapter also presents the Engineering Physical Sciences Research Council project EP/N006054/1: Supergen Wind Hub Grand Challenges Project: Screw piles for wind energy foundations. This project develops understanding of large scale screw piles through a combination of physical modelling, field testing and advanced numerical modelling using the material point method to simulate the effects of screw pile installation, ahead of performance analysis with traditional finite element techniques. The crowd and torque of the uniform and optimised screw pile designs were successfully measured in the centrifuge tests, indicating that the equipment is suitable for further investigating the magnitude of the full-scale screw pile installation requirements. |
| Related Links | http://dro.dur.ac.uk/25693/1/25693.pdf https://content.taylorfrancis.com/books/download?dac=C2018-0-86959-9&isbn=9780429438660&doi=10.1201/9780429438660-104&format=pdf |
| Ending Page | 700 |
| Page Count | 5 |
| Starting Page | 696 |
| DOI | 10.1201/9780429438660-104 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2018-07-11 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Physical Modelling in Geotechnics Geological Engineering Wind Energy Foundations Pile Geometry Piles Designed |
| Content Type | Text |
| Resource Type | Chapter |
