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Pile driveability in low-to-medium density chalk

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Title: Pile driveability in low-to-medium density chalk
Authors: Buckley, R
Kontoe, S
Jardine, R
Barbosa, P
Schroeder, F
Item Type: Journal Article
Abstract: Pile driving in low- to medium-density chalk is subject to significant uncertainty. Predictions of “chalk resistance to driving” (CRD) often vary considerably from field driving behaviour, with both pile refusals and free falls under zero load being reported. However, recent field studies have led to better understanding of the processes that control the wide range of behaviour seen in the field. This paper describes the primary outcomes of the analysis of dynamic tests at an onshore and an offshore site and uses the results to propose a new method to predict CRD. The method is based on phenomena identified experimentally: the relationship between cone penetration resistance and CRD, the attenuation of local stresses as driving advances, and the operational effective stress interface shear failure characteristics. The proposed method is evaluated through back-analyses of driving records from independent pile installation cases that were not included in developing the method, but involved known ground conditions, hammer characteristics, and applied energies. The proposed method is shown to lead to more reliable predictions of CRD than the approaches currently applied by industry.
Issue Date: 1-May-2021
Date of Acceptance: 5-Jul-2020
URI: http://hdl.handle.net/10044/1/81317
DOI: 10.1139/cgj-2019-0703
ISSN: 0008-3674
Publisher: NRC Research Press (Canadian Science Publishing)
Start Page: 650
End Page: 665
Journal / Book Title: Canadian Geotechnical Journal
Volume: 58
Issue: 5
Copyright Statement: Copyright remains with the author(s) or their institution(s). Permission for reuse (free in most cases) can be obtained fromcopyright.com.
Sponsor/Funder: Technology Strategy Board
Institution of Civil Engineers
Funder's Grant Number: 101968
Keywords: Geological & Geomatics Engineering
0905 Civil Engineering
0907 Environmental Engineering
Publication Status: Published
Online Publication Date: 2020-07-17
Appears in Collections:Civil and Environmental Engineering
Faculty of Engineering