Investigations into novel shallow penetrometers for fine-grained soils
Investigations into novel shallow penetrometers for fine-grained soils
This paper describes the initial evolution of two novel site investigation tools - shallow penetrometers - that are designed to measure the properties of surficial seabed soils, and in particular the axial resistance between pipelines and fine-grained soils. The shallow penetrometers are toroidal and hemispherical in shape, and are pushed vertically and rotated about the vertical axis. This design allows soil-interface shearing to be performed without the inconvenience of end effects. The paper describes numerical and centrifuge modelling results which show the resistance to purely vertical or torsional loading on undrained clay. The results of a cyclic torsional test using the toroidal penetrometer are shown, including detailed measurements of pore pressure build-up and dissipation. The new tools show promise and the results highlight the need to develop effective stress-based interpretation methods, to enhance the utility of these tools.
321-326
Yan, Y.
3864bfec-4680-4297-95a8-7fedf0f5498d
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Randolph, M.F.
75caa33a-e630-4ae8-84cd-758797bf9633
2010
Yan, Y.
3864bfec-4680-4297-95a8-7fedf0f5498d
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Randolph, M.F.
75caa33a-e630-4ae8-84cd-758797bf9633
Yan, Y., White, D.J. and Randolph, M.F.
(2010)
Investigations into novel shallow penetrometers for fine-grained soils.
Gourvenec, Susan and White, David
(eds.)
In Frontiers in Offshore Geotechnics II : Proceedings of the 2nd International Symposium on Frontiers in Offshore Geotechnics.
CRC Press.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
This paper describes the initial evolution of two novel site investigation tools - shallow penetrometers - that are designed to measure the properties of surficial seabed soils, and in particular the axial resistance between pipelines and fine-grained soils. The shallow penetrometers are toroidal and hemispherical in shape, and are pushed vertically and rotated about the vertical axis. This design allows soil-interface shearing to be performed without the inconvenience of end effects. The paper describes numerical and centrifuge modelling results which show the resistance to purely vertical or torsional loading on undrained clay. The results of a cyclic torsional test using the toroidal penetrometer are shown, including detailed measurements of pore pressure build-up and dissipation. The new tools show promise and the results highlight the need to develop effective stress-based interpretation methods, to enhance the utility of these tools.
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Published date: 2010
Venue - Dates:
2nd International Symposium on Frontiers in Offshore Geotechnics, , Perth, Australia, 2010-11-08 - 2010-11-10
Identifiers
Local EPrints ID: 419895
URI: http://eprints.soton.ac.uk/id/eprint/419895
PURE UUID: 3b9a5f5c-0165-45c0-bdf3-b80c2a17daa4
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Date deposited: 23 Apr 2018 16:30
Last modified: 09 Jan 2022 03:59
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Contributors
Author:
Y. Yan
Author:
M.F. Randolph
Editor:
Susan Gourvenec
Editor:
David White
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