Pore pressure response to dynamically installed penetrometers

Sabetamal, H; Carter, JP; Sloan, SW

Pore pressure response to dynamically installed penetrometers

Sabetamal, H

Carter, JP Sloan, SW

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Publisher:: ASCE-AMER SOC CIVIL ENGINEERS
Publication Type:: Journal Article
Citation:: International Journal of Geomechanics, 2018, 18, (7)
Issue Date:: 2018-07-01

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Field	Value	Language
dc.contributor.author	Sabetamal, H https://orcid.org/0000-0002-9237-2316
dc.contributor.author	Carter, JP
dc.contributor.author	Sloan, SW
dc.date.accessioned	2022-09-13T03:58:22Z
dc.date.available	2022-09-13T03:58:22Z
dc.date.issued	2018-07-01
dc.identifier.citation	International Journal of Geomechanics, 2018, 18, (7)
dc.identifier.issn	1532-3641
dc.identifier.issn	1943-5622
dc.identifier.uri	http://hdl.handle.net/10453/161779
dc.description.abstract	Potentially, a seabed may be characterized rapidly and economically by using dynamically installed free-falling penetrometers (FFPs). Because of their relatively rapid deployment and recovery, FFPs may be preferred over conventional full-flow or cone penetrometers for characterizing seabeds. However, despite several successful field trials of FFPs, significant uncertainty still exists about the data interpretation, mainly because of the fast nature of the penetration process, during which regions of the soil body close to the penetrometer experience very high strain rates. The consequence of such high strain rates on pore pressure measurement is not well known. Furthermore, the rigorous numerical analysis of the problem is notoriously difficult because it involves large deformations, dynamics, hydrodynamic coupling, highly nonlinear material behavior, rate dependency, and contact mechanics. A finite-element procedure was developed and used in this study to provide a dynamic coupled solution for the penetrometer impact and burial into saturated clay. Subsequently, some mechanisms involved in the generation of excess pore pressures were investigated with specific attention given to the effects of the penetrometer tip geometry and the location of the pore pressure measuring devices. An important numerical challenge in modeling this problem is highlighted in this paper. It concerns the numerical diffusion that can occur because of the remeshing process required in this large deformation, moving boundary problem.
dc.language	English
dc.publisher	ASCE-AMER SOC CIVIL ENGINEERS
dc.relation.ispartof	International Journal of Geomechanics
dc.relation.isbasedon	10.1061/(ASCE)GM.1943-5622.0001171
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	General Mathematics
dc.title	Pore pressure response to dynamically installed penetrometers
dc.type	Journal Article
utslib.citation.volume	18
utslib.for	0905 Civil Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
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	closed_access	*
dc.date.updated	2022-09-13T03:58:21Z
pubs.issue	7
pubs.publication-status	Published
pubs.volume	18
utslib.citation.issue	7

Abstract:

Potentially, a seabed may be characterized rapidly and economically by using dynamically installed free-falling penetrometers (FFPs). Because of their relatively rapid deployment and recovery, FFPs may be preferred over conventional full-flow or cone penetrometers for characterizing seabeds. However, despite several successful field trials of FFPs, significant uncertainty still exists about the data interpretation, mainly because of the fast nature of the penetration process, during which regions of the soil body close to the penetrometer experience very high strain rates. The consequence of such high strain rates on pore pressure measurement is not well known. Furthermore, the rigorous numerical analysis of the problem is notoriously difficult because it involves large deformations, dynamics, hydrodynamic coupling, highly nonlinear material behavior, rate dependency, and contact mechanics. A finite-element procedure was developed and used in this study to provide a dynamic coupled solution for the penetrometer impact and burial into saturated clay. Subsequently, some mechanisms involved in the generation of excess pore pressures were investigated with specific attention given to the effects of the penetrometer tip geometry and the location of the pore pressure measuring devices. An important numerical challenge in modeling this problem is highlighted in this paper. It concerns the numerical diffusion that can occur because of the remeshing process required in this large deformation, moving boundary problem.

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http://hdl.handle.net/10453/161779