CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand

Therar Al-Baghdadi; Craig Davidson; Michael J. Brown; Jonathan A. Knappett; Andrew Brennan; Charles Augarde; William Coombs; Lei Wang; David Richards; Anthony Blake

doi:10.3723/OSIG17.346

CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand

Therar Al-Baghdadi, Craig Davidson, Michael J. Brown, Jonathan A. Knappett, Andrew Brennan, Charles Augarde, William Coombs, Lei Wang, David Richards, Anthony Blake

Civil Engineering

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

16 Downloads (Pure)

Abstract

Screw piles (helical piles) have been used widely as foundations for onshore projects due to their ability to provide high compressive and tensile resistance as well as reduced noise/vibration during installation. These types of piles have been proposed as a potential innovative foundation for offshore wind turbines in deeper water. In order to adopt the screw pile technique as an offshore foundation, the geometry of the piles would need to be scaled up so they can provide the high capacities required for this application. Such a change in size and geometry will lead to uncertainties in predicting the required torque for installation in different soil types and stress histories. Without the ability to accurately predict installation torque it is difficult to design screw piles for offshore use or develop appropriate installation plant with the required torque capabilities in different soils. This paper presents centrifuge test results of screw piles and CPT tests undertaken in dense sand. The installation torque (T) has been correlated to the cone resistance qc to establish a proposed CPT-based design method to predict the required installation torque for modified screw pile geometries.

Original language	English
Title of host publication	Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments
Subtitle of host publication	Proceedings of the 8th International Conference, held 12–14 September 2017 at the Royal Geographical Society, London
Publisher	Society for Underwater Technology
Pages	346-353
Number of pages	8
Volume	1-2
ISBN (Print)	9780906940570 (hbk) Volume 1, 9780906940587 (hbk) Volume 2
DOIs	https://doi.org/10.3723/OSIG17.346
Publication status	Published - 12 Sep 2017
Event	8th Offshore Site Investigation and Geotechnics International Conference: ‘Smarter Solutions for Future Offshore Developments’ - Royal Geographical Society, London, United Kingdom Duration: 12 Sep 2017 → 14 Sep 2017 http://www.sutconnects.com/ (Link to conference website)

Conference

Conference	8th Offshore Site Investigation and Geotechnics International Conference
Country/Territory	United Kingdom
City	London
Period	12/09/17 → 14/09/17
Internet address	http://www.sutconnects.com/ (Link to conference website)

Keywords

Screw piles
CPT test
Sand
Torque

Access to Document

10.3723/OSIG17.346

Author Accepted ManuscriptAccepted author manuscript, 793 KB

1 Finished

Supergen Wind Challenge 2015: Screw Piles for Wind Energy Foundation Systems (Joint with Universities of Durham and Southampton)
Brennan, A., Brown, M. & Knappett, J.
Engineering and Physical Sciences Research Council
26/02/16 → 25/07/19
Project: Research

10 Conference contribution
4 Article
3 Paper

Centrifuge Testing of Large Screw Pile Geometries for Offshore Applications
Cerfontaine, B., Davidson, C., Brown, M., Knappett, J. & Sharif, Y., 5 Mar 2021, p. 139-144.
Research output: Contribution to conference › Paper › peer-review

Open Access
File
Control of screw pile installation to optimise performance for offshore energy applications
Cerfontaine, B., Brown, M., Knappett, J., Davidson, C., Sharif, Y., Huisman, M., Ottolini, M. & Ball, J. D., 20 Sep 2021, (E-pub ahead of print) In: Géotechnique.
Research output: Contribution to journal › Article › peer-review

Open Access
File
5 Citations (Scopus)

122 Downloads (Pure)
On Lagrangian mechanics and the implicit material point method for large deformation elasto-plasticity
Coombs, W. M., Augarde, C., Brown, M., Brennan, A., Charlton, T., Knappett, J., Motlagh, Y. & Wang, L., 1 Jan 2020, In: Computer Methods in Applied Mechanics and Engineering. 358, p. 1-32 32 p., 112622.
Research output: Contribution to journal › Article › peer-review

Open Access
File
16 Citations (Scopus)

105 Downloads (Pure)

4 Invited talk
1 Membership of committee

Invited Speaker, NGI, Norway: Using DEM to Investigate the Applicability of Screw Piles as an Alternative Solution for Offshore Wind Turbine Foundations
Michael Brown (Speaker) & Yaseen Sharif (Speaker)
25 Nov 2020
Activity: Talk or presentation types › Invited talk
Fugro Brussels, Update on models for offshore pipeline plough predictions and use of screw piles as an alternative to driven piles
Michael Brown (Invited speaker)
19 Jun 2018
Activity: Talk or presentation types › Invited talk
Kyushu Univeristy, Japan, Invited speaker: Centrifuge modelling of screw piles for offshore wind energy foundations
Michael Brown (Invited speaker)
21 Sep 2018
Activity: Talk or presentation types › Invited talk

Dundee University engineers hope to silence offshore construction
Michael Brown
28/01/21
1 item of Media coverage
Press/Media: Research
Heerema Developing Silent Foundations
Michael Brown
22/01/21
1 item of Media coverage
Press/Media: Research
How about Screwing Offshore Wind Piles?
Michael Brown
14/07/15
1 Media contribution
Press/Media: Research

Winner ICPE Best presentation award
Brown, Michael (Recipient), Sep 2018
Prize: Prize (including medals and awards)

Cite this

Al-Baghdadi, T., Davidson, C., Brown, M. J., Knappett, J. A., Brennan, A., Augarde, C., Coombs, W., Wang, L., Richards, D., & Blake, A. (2017). CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand. In Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments: Proceedings of the 8th International Conference, held 12–14 September 2017 at the Royal Geographical Society, London (Vol. 1-2, pp. 346-353). Society for Underwater Technology. https://doi.org/10.3723/OSIG17.346

Al-Baghdadi, Therar ; Davidson, Craig ; Brown, Michael J. ; Knappett, Jonathan A. ; Brennan, Andrew ; Augarde, Charles ; Coombs, William ; Wang, Lei ; Richards, David ; Blake, Anthony. / CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand. Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments: Proceedings of the 8th International Conference, held 12–14 September 2017 at the Royal Geographical Society, London. Vol. 1-2 Society for Underwater Technology, 2017. pp. 346-353

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abstract = "Screw piles (helical piles) have been used widely as foundations for onshore projects due to their ability to provide high compressive and tensile resistance as well as reduced noise/vibration during installation. These types of piles have been proposed as a potential innovative foundation for offshore wind turbines in deeper water. In order to adopt the screw pile technique as an offshore foundation, the geometry of the piles would need to be scaled up so they can provide the high capacities required for this application. Such a change in size and geometry will lead to uncertainties in predicting the required torque for installation in different soil types and stress histories. Without the ability to accurately predict installation torque it is difficult to design screw piles for offshore use or develop appropriate installation plant with the required torque capabilities in different soils. This paper presents centrifuge test results of screw piles and CPT tests undertaken in dense sand. The installation torque (T) has been correlated to the cone resistance qc to establish a proposed CPT-based design method to predict the required installation torque for modified screw pile geometries.",

keywords = "Screw piles, CPT test, Sand, Torque",

author = "Therar Al-Baghdadi and Craig Davidson and Brown, {Michael J.} and Knappett, {Jonathan A.} and Andrew Brennan and Charles Augarde and William Coombs and Lei Wang and David Richards and Anthony Blake",

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language = "English",

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booktitle = "Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments",

publisher = "Society for Underwater Technology",

note = "8th Offshore Site Investigation and Geotechnics International Conference : {\textquoteleft}Smarter Solutions for Future Offshore Developments{\textquoteright} ; Conference date: 12-09-2017 Through 14-09-2017",

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Al-Baghdadi, T, Davidson, C , Brown, MJ , Knappett, JA , Brennan, A, Augarde, C, Coombs, W, Wang, L, Richards, D & Blake, A 2017, CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand. in Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments: Proceedings of the 8th International Conference, held 12–14 September 2017 at the Royal Geographical Society, London. vol. 1-2, Society for Underwater Technology, pp. 346-353, 8th Offshore Site Investigation and Geotechnics International Conference, London, United Kingdom, 12/09/17. https://doi.org/10.3723/OSIG17.346

CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand. / Al-Baghdadi, Therar; Davidson, Craig ; Brown, Michael J.; Knappett, Jonathan A.; Brennan, Andrew; Augarde, Charles; Coombs, William; Wang, Lei; Richards, David; Blake, Anthony.

Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments: Proceedings of the 8th International Conference, held 12–14 September 2017 at the Royal Geographical Society, London. Vol. 1-2 Society for Underwater Technology, 2017. p. 346-353.

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

TY - GEN

T1 - CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand

AU - Al-Baghdadi, Therar

AU - Davidson, Craig

AU - Brown, Michael J.

AU - Knappett, Jonathan A.

AU - Brennan, Andrew

AU - Augarde, Charles

AU - Coombs, William

AU - Wang, Lei

AU - Richards, David

AU - Blake, Anthony

PY - 2017/9/12

Y1 - 2017/9/12

N2 - Screw piles (helical piles) have been used widely as foundations for onshore projects due to their ability to provide high compressive and tensile resistance as well as reduced noise/vibration during installation. These types of piles have been proposed as a potential innovative foundation for offshore wind turbines in deeper water. In order to adopt the screw pile technique as an offshore foundation, the geometry of the piles would need to be scaled up so they can provide the high capacities required for this application. Such a change in size and geometry will lead to uncertainties in predicting the required torque for installation in different soil types and stress histories. Without the ability to accurately predict installation torque it is difficult to design screw piles for offshore use or develop appropriate installation plant with the required torque capabilities in different soils. This paper presents centrifuge test results of screw piles and CPT tests undertaken in dense sand. The installation torque (T) has been correlated to the cone resistance qc to establish a proposed CPT-based design method to predict the required installation torque for modified screw pile geometries.

AB - Screw piles (helical piles) have been used widely as foundations for onshore projects due to their ability to provide high compressive and tensile resistance as well as reduced noise/vibration during installation. These types of piles have been proposed as a potential innovative foundation for offshore wind turbines in deeper water. In order to adopt the screw pile technique as an offshore foundation, the geometry of the piles would need to be scaled up so they can provide the high capacities required for this application. Such a change in size and geometry will lead to uncertainties in predicting the required torque for installation in different soil types and stress histories. Without the ability to accurately predict installation torque it is difficult to design screw piles for offshore use or develop appropriate installation plant with the required torque capabilities in different soils. This paper presents centrifuge test results of screw piles and CPT tests undertaken in dense sand. The installation torque (T) has been correlated to the cone resistance qc to establish a proposed CPT-based design method to predict the required installation torque for modified screw pile geometries.

KW - Screw piles

KW - CPT test

KW - Sand

KW - Torque

U2 - 10.3723/OSIG17.346

DO - 10.3723/OSIG17.346

M3 - Conference contribution

SN - 9780906940570 (hbk) Volume 1

SN - 9780906940587 (hbk) Volume 2

VL - 1-2

SP - 346

EP - 353

BT - Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments

PB - Society for Underwater Technology

T2 - 8th Offshore Site Investigation and Geotechnics International Conference

Y2 - 12 September 2017 through 14 September 2017

ER -

Al-Baghdadi T, Davidson C , Brown MJ , Knappett JA , Brennan A, Augarde C et al. CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand. In Offshore Site Investigation and Geotechnics: Smarter Solutions for Future Offshore Developments: Proceedings of the 8th International Conference, held 12–14 September 2017 at the Royal Geographical Society, London. Vol. 1-2. Society for Underwater Technology. 2017. p. 346-353 https://doi.org/10.3723/OSIG17.346

CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand

Abstract

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