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

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

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

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

Civil Engineering

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

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
Volume	1-2
ISBN (Print)	9780906940570 (hbk) Volume 1, 9780906940587 (hbk) Volume 2
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	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

https://www.sut.org/books-and-conference-proceedings/offshore-site-investigation-and-geotechnics-2017-conference-proceedings/

Fingerprint Dive into the research topics of 'CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand'. Together they form a unique fingerprint.

10 Conference contribution
3 Article
2 Paper

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
5 Citations (Scopus)

110 Downloads (Pure)
Optimisation of screw anchor lateral capacity in sand for offshore renewable energy applications
Cerfontaine, B., Brown, M., Knappett, J., Davidson, C. & Sharif, Y., Sep 2020, Proceedings of the 4th International Symposium on Frontiers in Offshore Geotechnics. Deep Foundations Institute, 3451
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Open Access
File
Design of plate and screw anchors in dense sand: failure mechanism, capacity and deformation
Cerfontaine, B., Knappett, J., Brown, M. & Bradsaw, A. S., 25 Jun 2019, 7th International Symposium on Deformation Characteristics of Geomaterials (IS-Glasgow 2019). Tarantino, A. & Ibraim, E. (eds.). 2019 ed. EDP Sciences, Vol. 92. p. 1-6 6 p. 16010. (E3S Web of Conferences; vol. 92).
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Open Access
File
140 Downloads (Pure)

4 Invited talk
1 Membership of committee

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
1st International Symposium on Screw Piles for Energy Applications (Event)
Michael Brown (Chair)
Dec 2018 → 28 May 2019
Activity: Membership types › Membership of committee
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

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., Knappett, J., Brennan, A., Augarde, C. E., Coombs, W. M., 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://www.sut.org/books-and-conference-proceedings/offshore-site-investigation-and-geotechnics-2017-conference-proceedings/

Al-Baghdadi, Therar ; Davidson, Craig ; Brown, Michael ; Knappett, Jonathan ; Brennan, Andrew ; Augarde, Charles E. ; Coombs, William M. ; 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

@inproceedings{3761d8bf9eb843e58b53b780b8e34b31,

title = "CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand",

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 Michael Brown and Jonathan Knappett and Andrew Brennan and Augarde, {Charles E.} and Coombs, {William M.} and Lei Wang and David Richards and Anthony Blake",

year = "2017",

month = sep,

day = "12",

language = "English",

isbn = "9780906940570 (hbk) Volume 1",

volume = "1-2",

pages = "346--353",

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",

url = "http://www.sutconnects.com/",

}

Al-Baghdadi, T, Davidson, C , Brown, M , Knappett, J , Brennan, A, Augarde, CE, Coombs, WM, 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://www.sut.org/books-and-conference-proceedings/offshore-site-investigation-and-geotechnics-2017-conference-proceedings/>

CPT Based Design Procedure for Installation Torque Prediction for Screw Piles Installed in Sand. / Al-Baghdadi, Therar; Davidson, Craig ; Brown, Michael ; Knappett, Jonathan ; Brennan, Andrew; Augarde, Charles E.; Coombs, William M.; 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

AU - Knappett, Jonathan

AU - Brennan, Andrew

AU - Augarde, Charles E.

AU - Coombs, William M.

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

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 M , Knappett J , Brennan A, Augarde CE 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