A New 'Unified' CPT-Based Axial Pile Capacity Design Method for Driven Piles in Sand

Barry M. Lehane; Zhongqiang  Liu; Eduardo  Bittar; Farrokh Nadim; Suzanne  Lacasse; Richard  Jardine; Pasquale  Carotenuto; Mike  Rattley; Kenneth Gavin; More Authors

A New 'Unified' CPT-Based Axial Pile Capacity Design Method for Driven Piles in Sand

Barry M. Lehane
, Zhongqiang Liu
, Eduardo Bittar
, Farrokh Nadim
, Suzanne Lacasse
, Richard Jardine
, Pasquale Carotenuto
, Mike Rattley
, Kenneth Gavin
, More Authors

Geo-engineering

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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Abstract

This paper outlines the development of a new ‘Unified’ CPT-based method for estimating the axial capacity of driven piles in sand. The method adapts key features of the four CPT-based methods currently in the API and ISO guidelines. The new method was calibrated with the Unified database of pile load tests developed as part of an earlier joint industry research project (Lehane et al. 2017). Key factors known to influence pile capacity are incorporated in the new Unified method formulation, including (i) the degree of soil displacement (plugging) during installation, (ii) the influence of relative pile tip depth, (iii) sand-pile interface friction angle, (iv) changes in radial stress during loading and (v) the influence of loading direction. It is shown that the new method provides more reliable predictions of the capacities of the pile load tests in the Unified database than any of the existing axial pile capacity design methods in the API and ISO guidelines.

Original language	English
Title of host publication	Proceedings Fourth International Symposium on Frontiers in Offshore Geotechnics
Editors	Zack Westgate
Pages	462-477
Number of pages	16
Publication status	Published - 2020
Event	4th International Symposium on Frontiers in Offshore Geotechnics (postponed) - Austin, United States Duration: 8 Nov 2021 → 11 Nov 2021 https://www.isfog2020.org/

Conference

Conference	4th International Symposium on Frontiers in Offshore Geotechnics (postponed)
Abbreviated title	ISFOG 2020
Country/Territory	United States
City	Austin
Period	8/11/21 → 11/11/21
Internet address	https://www.isfog2020.org/

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Thematic collaboration

TU Delft Wind Energy Institute (DUWIND)

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ISFOG 2020 CPT Design MethodFinal published version, 699 KB

Cite this

@inproceedings{555ec010bd734879b3fdc81e52a3697a,

title = "A New 'Unified' CPT-Based Axial Pile Capacity Design Method for Driven Piles in Sand",

abstract = "This paper outlines the development of a new {\textquoteleft}Unified{\textquoteright} CPT-based method for estimating the axial capacity of driven piles in sand. The method adapts key features of the four CPT-based methods currently in the API and ISO guidelines. The new method was calibrated with the Unified database of pile load tests developed as part of an earlier joint industry research project (Lehane et al. 2017). Key factors known to influence pile capacity are incorporated in the new Unified method formulation, including (i) the degree of soil displacement (plugging) during installation, (ii) the influence of relative pile tip depth, (iii) sand-pile interface friction angle, (iv) changes in radial stress during loading and (v) the influence of loading direction. It is shown that the new method provides more reliable predictions of the capacities of the pile load tests in the Unified database than any of the existing axial pile capacity design methods in the API and ISO guidelines.",

author = "Lehane, \{Barry M.\} and Zhongqiang Liu and Eduardo Bittar and Farrokh Nadim and Suzanne Lacasse and Richard Jardine and Pasquale Carotenuto and Mike Rattley and Kenneth Gavin and \{More Authors\}",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.; 4th International Symposium on Frontiers in Offshore Geotechnics (postponed), ISFOG 2020 ; Conference date: 08-11-2021 Through 11-11-2021",

year = "2020",

language = "English",

pages = "462--477",

editor = "Zack Westgate",

booktitle = "Proceedings Fourth International Symposium on Frontiers in Offshore Geotechnics",

url = "https://www.isfog2020.org/",

}

Lehane, BM, Liu, Z, Bittar, E, Nadim, F, Lacasse, S, Jardine, R, Carotenuto, P, Rattley, M, Gavin, K & More Authors 2020, A New 'Unified' CPT-Based Axial Pile Capacity Design Method for Driven Piles in Sand. in Z Westgate (ed.), Proceedings Fourth International Symposium on Frontiers in Offshore Geotechnics., 3457, pp. 462-477, 4th International Symposium on Frontiers in Offshore Geotechnics (postponed), Austin, Texas, United States, 8/11/21.

A New 'Unified' CPT-Based Axial Pile Capacity Design Method for Driven Piles in Sand. / Lehane, Barry M.; Liu, Zhongqiang ; Bittar, Eduardo et al.
Proceedings Fourth International Symposium on Frontiers in Offshore Geotechnics. ed. / Zack Westgate. 2020. p. 462-477 3457.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - A New 'Unified' CPT-Based Axial Pile Capacity Design Method for Driven Piles in Sand

AU - Lehane, Barry M.

AU - Liu, Zhongqiang

AU - Bittar, Eduardo

AU - Nadim, Farrokh

AU - Lacasse, Suzanne

AU - Jardine, Richard

AU - Carotenuto, Pasquale

AU - Rattley, Mike

AU - Gavin, Kenneth

AU - More Authors, null

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2020

Y1 - 2020

N2 - This paper outlines the development of a new ‘Unified’ CPT-based method for estimating the axial capacity of driven piles in sand. The method adapts key features of the four CPT-based methods currently in the API and ISO guidelines. The new method was calibrated with the Unified database of pile load tests developed as part of an earlier joint industry research project (Lehane et al. 2017). Key factors known to influence pile capacity are incorporated in the new Unified method formulation, including (i) the degree of soil displacement (plugging) during installation, (ii) the influence of relative pile tip depth, (iii) sand-pile interface friction angle, (iv) changes in radial stress during loading and (v) the influence of loading direction. It is shown that the new method provides more reliable predictions of the capacities of the pile load tests in the Unified database than any of the existing axial pile capacity design methods in the API and ISO guidelines.

AB - This paper outlines the development of a new ‘Unified’ CPT-based method for estimating the axial capacity of driven piles in sand. The method adapts key features of the four CPT-based methods currently in the API and ISO guidelines. The new method was calibrated with the Unified database of pile load tests developed as part of an earlier joint industry research project (Lehane et al. 2017). Key factors known to influence pile capacity are incorporated in the new Unified method formulation, including (i) the degree of soil displacement (plugging) during installation, (ii) the influence of relative pile tip depth, (iii) sand-pile interface friction angle, (iv) changes in radial stress during loading and (v) the influence of loading direction. It is shown that the new method provides more reliable predictions of the capacities of the pile load tests in the Unified database than any of the existing axial pile capacity design methods in the API and ISO guidelines.

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M3 - Conference contribution

SP - 462

EP - 477

BT - Proceedings Fourth International Symposium on Frontiers in Offshore Geotechnics

A2 - Westgate, Zack

T2 - 4th International Symposium on Frontiers in Offshore Geotechnics (postponed)

Y2 - 8 November 2021 through 11 November 2021

ER -

A New 'Unified' CPT-Based Axial Pile Capacity Design Method for Driven Piles in Sand

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