Three-dimensional effects in low-strain integrity testing of large diameter pipe piles

Zheng, C; Liu, H; Ding, X; Kouretzis, GP; Sheng, D

Three-dimensional effects in low-strain integrity testing of large diameter pipe piles

Zheng, C Liu, H Ding, X Kouretzis, GP Sheng, D

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Publisher:: ASCE-AMER SOC CIVIL ENGINEERS
Publication Type:: Journal Article
Citation:: Journal of Engineering Mechanics, 2016, 142, (9)
Issue Date:: 2016-09-01

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Field	Value	Language
dc.contributor.author	Zheng, C
dc.contributor.author	Liu, H
dc.contributor.author	Ding, X
dc.contributor.author	Kouretzis, GP
dc.contributor.author	Sheng, D https://orcid.org/0000-0002-1665-6931
dc.date.accessioned	2022-08-12T22:53:53Z
dc.date.available	2022-08-12T22:53:53Z
dc.date.issued	2016-09-01
dc.identifier.citation	Journal of Engineering Mechanics, 2016, 142, (9)
dc.identifier.issn	0733-9399
dc.identifier.issn	1943-7889
dc.identifier.uri	http://hdl.handle.net/10453/160056
dc.description.abstract	The interpretation of low-strain integrity testing performed on piles is commonly based on methods developed from the onedimensional wave propagation theory. However, stress waves generated from the impact of the hammer on the head of a pipe pile propagate not only along the vertical, but also the circumferential and radial directions. One-dimensional methods that ignore these waves may underestimate the amplitude of the incident wave, and fail to predict the development of high-frequency interferences that may compromise the assessment of the integrity, particularly of large-diameter pipe piles. To account for these three-dimensional effects, the authors formulate a solution for determining the vertical vibration response along the cross-section of the pipe pile head to an impact load, which robustly accounts for coupling of pipe pile and viscoelastic soil vibrations. Presentation of the method is followed by a discussion on identifying the mechanisms that underlie body and surface stress-wave propagation along the section of the pipe pile head, and the conditions under which these may undermine the interpretation of pile integrity tests with conventional one-dimensional methods. A detailed parametric investigation revealed that there is an optimal position of the receiver, relative to the hammer impact, where the amplitude of the high-frequency interferences is minimized and the arrival of the reflected wave is clearly identified in the waveforms.
dc.language	English
dc.publisher	ASCE-AMER SOC CIVIL ENGINEERS
dc.relation.ispartof	Journal of Engineering Mechanics
dc.relation.isbasedon	10.1061/(ASCE)EM.1943-7889.0001117
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0905 Civil Engineering, 0913 Mechanical Engineering
dc.subject.classification	Civil Engineering
dc.title	Three-dimensional effects in low-strain integrity testing of large diameter pipe piles
dc.type	Journal Article
utslib.citation.volume	142
utslib.for	0905 Civil Engineering
utslib.for	0913 Mechanical Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	in_progress	*
dc.date.updated	2022-08-12T22:53:52Z
pubs.issue	9
pubs.publication-status	Published
pubs.volume	142
utslib.citation.issue	9

Abstract:

The interpretation of low-strain integrity testing performed on piles is commonly based on methods developed from the onedimensional wave propagation theory. However, stress waves generated from the impact of the hammer on the head of a pipe pile propagate not only along the vertical, but also the circumferential and radial directions. One-dimensional methods that ignore these waves may underestimate the amplitude of the incident wave, and fail to predict the development of high-frequency interferences that may compromise the assessment of the integrity, particularly of large-diameter pipe piles. To account for these three-dimensional effects, the authors formulate a solution for determining the vertical vibration response along the cross-section of the pipe pile head to an impact load, which robustly accounts for coupling of pipe pile and viscoelastic soil vibrations. Presentation of the method is followed by a discussion on identifying the mechanisms that underlie body and surface stress-wave propagation along the section of the pipe pile head, and the conditions under which these may undermine the interpretation of pile integrity tests with conventional one-dimensional methods. A detailed parametric investigation revealed that there is an optimal position of the receiver, relative to the hammer impact, where the amplitude of the high-frequency interferences is minimized and the arrival of the reflected wave is clearly identified in the waveforms.

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http://hdl.handle.net/10453/160056