Assessment of Pile Length Criteria for Monopile Foundations

Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review

Autoren

  • Martin Achmus
  • Mauricio Marcelo Terceros Almanza
  • Florian tom Wörden
  • Klaus Thieken

Organisationseinheiten

Externe Organisationen

  • ACP Grundbau GmbH
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Titel des SammelwerksOffshore Site Investigation Geotechnics
Untertitel8th International Conference Proceeding
Seiten1140-1147
Seitenumfang8
Band2
PublikationsstatusVeröffentlicht - 1 Jan. 2017
VeranstaltungOffshore Site Investigation and Geotechnics 2017 - London, Großbritannien / Vereinigtes Königreich
Dauer: 12 Sept. 2017 → 14 Sept. 2017
Konferenznummer: 8

Abstract

For the geotechnical monopile design of offshore wind turbines, the required embedded monopile length is commonly derived by so-called pile length criteria. As no clear procedure is specified by the current offshore guidelines, different criteria are used in design practice. Four often used pile length criteria are investigated by means of a comparative study on monopiles in homogenous sand. Herein, the influences of pile diameter and stiffness, load level and applied p-y approach on the outcome of the individual pile length criteria are discussed on basis of the head rotation due to characteristic ULS loads and the results of different ULS and SLS design proofs. Based on the identified inadequacies of the criteria, it is concluded that the consideration of a maximum pile head rotation is more suitable to reflect the pile stability due to cyclic load effects than existing criteria. However, the disregard of any pile length criterion is not in line with the DNVGL guideline and the EA-Pfähle recommendations and thus may induce problems in the certification and approval process.

Zitieren

Assessment of Pile Length Criteria for Monopile Foundations. / Achmus, Martin; Terceros Almanza, Mauricio Marcelo; tom Wörden, Florian et al.
Offshore Site Investigation Geotechnics: 8th International Conference Proceeding. Band 2 2017. S. 1140-1147.

Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review

Achmus, M, Terceros Almanza, MM, tom Wörden, F & Thieken, K 2017, Assessment of Pile Length Criteria for Monopile Foundations. in Offshore Site Investigation Geotechnics: 8th International Conference Proceeding. Bd. 2, S. 1140-1147, Offshore Site Investigation and Geotechnics 2017, London, Großbritannien / Vereinigtes Königreich, 12 Sept. 2017. https://doi.org/10.3723/OSIG17.1140
Achmus, M., Terceros Almanza, M. M., tom Wörden, F., & Thieken, K. (2017). Assessment of Pile Length Criteria for Monopile Foundations. In Offshore Site Investigation Geotechnics: 8th International Conference Proceeding (Band 2, S. 1140-1147) https://doi.org/10.3723/OSIG17.1140
Achmus M, Terceros Almanza MM, tom Wörden F, Thieken K. Assessment of Pile Length Criteria for Monopile Foundations. in Offshore Site Investigation Geotechnics: 8th International Conference Proceeding. Band 2. 2017. S. 1140-1147 doi: 10.3723/OSIG17.1140
Achmus, Martin ; Terceros Almanza, Mauricio Marcelo ; tom Wörden, Florian et al. / Assessment of Pile Length Criteria for Monopile Foundations. Offshore Site Investigation Geotechnics: 8th International Conference Proceeding. Band 2 2017. S. 1140-1147
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title = "Assessment of Pile Length Criteria for Monopile Foundations",
abstract = "For the geotechnical monopile design of offshore wind turbines, the required embedded monopile length is commonly derived by so-called pile length criteria. As no clear procedure is specified by the current offshore guidelines, different criteria are used in design practice. Four often used pile length criteria are investigated by means of a comparative study on monopiles in homogenous sand. Herein, the influences of pile diameter and stiffness, load level and applied p-y approach on the outcome of the individual pile length criteria are discussed on basis of the head rotation due to characteristic ULS loads and the results of different ULS and SLS design proofs. Based on the identified inadequacies of the criteria, it is concluded that the consideration of a maximum pile head rotation is more suitable to reflect the pile stability due to cyclic load effects than existing criteria. However, the disregard of any pile length criterion is not in line with the DNVGL guideline and the EA-Pf{\"a}hle recommendations and thus may induce problems in the certification and approval process.",
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Download

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T1 - Assessment of Pile Length Criteria for Monopile Foundations

AU - Achmus, Martin

AU - Terceros Almanza, Mauricio Marcelo

AU - tom Wörden, Florian

AU - Thieken, Klaus

N1 - Conference code: 8

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AB - For the geotechnical monopile design of offshore wind turbines, the required embedded monopile length is commonly derived by so-called pile length criteria. As no clear procedure is specified by the current offshore guidelines, different criteria are used in design practice. Four often used pile length criteria are investigated by means of a comparative study on monopiles in homogenous sand. Herein, the influences of pile diameter and stiffness, load level and applied p-y approach on the outcome of the individual pile length criteria are discussed on basis of the head rotation due to characteristic ULS loads and the results of different ULS and SLS design proofs. Based on the identified inadequacies of the criteria, it is concluded that the consideration of a maximum pile head rotation is more suitable to reflect the pile stability due to cyclic load effects than existing criteria. However, the disregard of any pile length criterion is not in line with the DNVGL guideline and the EA-Pfähle recommendations and thus may induce problems in the certification and approval process.

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