The effect of scour on monopile lateral behaviour

S. M. Bayton; J. A. Black

doi:10.32075/17ECSMGE-2019-0775

The effect of scour on monopile lateral behaviour

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A series of centrifuge experiments examining the effect of scour hole formation on the lateral ultimate limit state (ULS) behaviour of monopiles is presented. Model foundation tests were performed at 100 gravities (100g) of a prototype pile 5 m in diameter with a pre-scour hole embedment of L/D = 5. The testing schedule saw four separate scour cases - 0.5D, 1.0D and 1.5D local scour (a conical formation around the monopile) and 1.0D global scour (a complete loss of embedment). Observations reveal a significant reduction in lateral stiffness and ultimate capacity with an increase in scour depth. In addition design codes are proven to be conservative in their recommendations for dealing with scour. Local p - y curves along the depth of the monopile are presented and exemplify the effects of overburden stresses from soil outside of the scour formation; it would appear that at depth, the effects of scour on soil strength become negligible.

Original language	English
Title of host publication	Proceedings of the XVII ECSMGE-2019: geotechnical engineering foundation of the future
Editors	Haraldur Sigursteinsson, Sigurður Erlingsson, Bjarni Bessason
Publisher	Icelandic Geotechnical Society
ISBN (Electronic)	9789935943613
DOIs	https://doi.org/10.32075/17ECSMGE-2019-0775
Publication status	Published - 01 Sept 2019
Externally published	Yes
Event	17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Reykjavik, Iceland Duration: 01 Sept 2019 → 06 Sept 2019

Conference

Conference	17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019
Country/Territory	Iceland
City	Reykjavik
Period	01/09/2019 → 06/09/2019

Keywords

Centrifuge
Monopile
Offshore
P - y curves
Scour

ASJC Scopus subject areas

Soil Science
Geotechnical Engineering and Engineering Geology

Access to Document

10.32075/17ECSMGE-2019-0775Licence: Unspecified

Cite this

@inproceedings{2b1f79129d724adeb10a9887bcac0d01,

title = "The effect of scour on monopile lateral behaviour",

abstract = "A series of centrifuge experiments examining the effect of scour hole formation on the lateral ultimate limit state (ULS) behaviour of monopiles is presented. Model foundation tests were performed at 100 gravities (100g) of a prototype pile 5 m in diameter with a pre-scour hole embedment of L/D = 5. The testing schedule saw four separate scour cases - 0.5D, 1.0D and 1.5D local scour (a conical formation around the monopile) and 1.0D global scour (a complete loss of embedment). Observations reveal a significant reduction in lateral stiffness and ultimate capacity with an increase in scour depth. In addition design codes are proven to be conservative in their recommendations for dealing with scour. Local p - y curves along the depth of the monopile are presented and exemplify the effects of overburden stresses from soil outside of the scour formation; it would appear that at depth, the effects of scour on soil strength become negligible.",

keywords = "Centrifuge, Monopile, Offshore, P - y curves, Scour",

author = "Bayton, {S. M.} and Black, {J. A.}",

year = "2019",

month = sep,

day = "1",

doi = "10.32075/17ECSMGE-2019-0775",

language = "English",

editor = "Haraldur Sigursteinsson and Sigur{\dh}ur Erlingsson and Bjarni Bessason",

booktitle = "Proceedings of the XVII ECSMGE-2019: geotechnical engineering foundation of the future",

publisher = "Icelandic Geotechnical Society",

note = "17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 ; Conference date: 01-09-2019 Through 06-09-2019",

}

Bayton, SM & Black, JA 2019, The effect of scour on monopile lateral behaviour. in H Sigursteinsson, S Erlingsson & B Bessason (eds), Proceedings of the XVII ECSMGE-2019: geotechnical engineering foundation of the future. Icelandic Geotechnical Society, 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019, Reykjavik, Iceland, 01/09/2019. https://doi.org/10.32075/17ECSMGE-2019-0775

TY - GEN

T1 - The effect of scour on monopile lateral behaviour

AU - Bayton, S. M.

AU - Black, J. A.

PY - 2019/9/1

Y1 - 2019/9/1

N2 - A series of centrifuge experiments examining the effect of scour hole formation on the lateral ultimate limit state (ULS) behaviour of monopiles is presented. Model foundation tests were performed at 100 gravities (100g) of a prototype pile 5 m in diameter with a pre-scour hole embedment of L/D = 5. The testing schedule saw four separate scour cases - 0.5D, 1.0D and 1.5D local scour (a conical formation around the monopile) and 1.0D global scour (a complete loss of embedment). Observations reveal a significant reduction in lateral stiffness and ultimate capacity with an increase in scour depth. In addition design codes are proven to be conservative in their recommendations for dealing with scour. Local p - y curves along the depth of the monopile are presented and exemplify the effects of overburden stresses from soil outside of the scour formation; it would appear that at depth, the effects of scour on soil strength become negligible.

AB - A series of centrifuge experiments examining the effect of scour hole formation on the lateral ultimate limit state (ULS) behaviour of monopiles is presented. Model foundation tests were performed at 100 gravities (100g) of a prototype pile 5 m in diameter with a pre-scour hole embedment of L/D = 5. The testing schedule saw four separate scour cases - 0.5D, 1.0D and 1.5D local scour (a conical formation around the monopile) and 1.0D global scour (a complete loss of embedment). Observations reveal a significant reduction in lateral stiffness and ultimate capacity with an increase in scour depth. In addition design codes are proven to be conservative in their recommendations for dealing with scour. Local p - y curves along the depth of the monopile are presented and exemplify the effects of overburden stresses from soil outside of the scour formation; it would appear that at depth, the effects of scour on soil strength become negligible.

KW - Centrifuge

KW - Monopile

KW - Offshore

KW - P - y curves

KW - Scour

U2 - 10.32075/17ECSMGE-2019-0775

DO - 10.32075/17ECSMGE-2019-0775

M3 - Conference contribution

AN - SCOPUS:85111932966

BT - Proceedings of the XVII ECSMGE-2019: geotechnical engineering foundation of the future

A2 - Sigursteinsson, Haraldur

A2 - Erlingsson, Sigurður

A2 - Bessason, Bjarni

PB - Icelandic Geotechnical Society

T2 - 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019

Y2 - 1 September 2019 through 6 September 2019

ER -

The effect of scour on monopile lateral behaviour

Abstract

Conference

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this