Characterisation of near-surface sediments using a blend of vertical and shallow rotational penetrometers
Characterisation of near-surface sediments using a blend of vertical and shallow rotational penetrometers
The mechanical properties of near-surface sediments – to a depth of approximately half a metre – are relevant to the design of cables, pipelines and other shallowly-embedded infrastructure, as well as benthic habitat characterisation. For this depth of interest, vertically-pushed penetrometers – such as the cone, T-bar or ball – can be supplemented by shallow rotational devices such as the toroid or hemiball. In this paper, we report vertical and shallow rotational penetrometer test procedures and show results obtained in project conditions on natural soil samples. By combining these different penetrometers, a wider and more reliable set of mechanical properties – spanning strength and consolidation behaviour – can be obtained, compared to conventional practice. The paper concludes with practical advice on testing protocols and interpretation methods to best characterise the shallow seafloor, including the use of novel shallow penetrometers.
259-266
White, D. J.
a986033d-d26d-4419-a3f3-20dc54efce93
Stanier, S. A.
b11049bd-44ee-4db9-9e66-a5ea20a3c70b
Mohr, H.
2afb09e1-17c7-4875-ac8a-cd15850c1e91
June 2022
White, D. J.
a986033d-d26d-4419-a3f3-20dc54efce93
Stanier, S. A.
b11049bd-44ee-4db9-9e66-a5ea20a3c70b
Mohr, H.
2afb09e1-17c7-4875-ac8a-cd15850c1e91
White, D. J., Stanier, S. A. and Mohr, H.
(2022)
Characterisation of near-surface sediments using a blend of vertical and shallow rotational penetrometers.
Gottardi, Guido and Tonni, Laura
(eds.)
In Cone Penetration Testing 2022 - Proceedings of the 5th International Symposium on Cone Penetration Testing, CPT 2022.
CRC Press / Balkema.
.
(doi:10.1201/9781003308829-33).
Record type:
Conference or Workshop Item
(Paper)
Abstract
The mechanical properties of near-surface sediments – to a depth of approximately half a metre – are relevant to the design of cables, pipelines and other shallowly-embedded infrastructure, as well as benthic habitat characterisation. For this depth of interest, vertically-pushed penetrometers – such as the cone, T-bar or ball – can be supplemented by shallow rotational devices such as the toroid or hemiball. In this paper, we report vertical and shallow rotational penetrometer test procedures and show results obtained in project conditions on natural soil samples. By combining these different penetrometers, a wider and more reliable set of mechanical properties – spanning strength and consolidation behaviour – can be obtained, compared to conventional practice. The paper concludes with practical advice on testing protocols and interpretation methods to best characterise the shallow seafloor, including the use of novel shallow penetrometers.
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More information
Published date: June 2022
Additional Information:
Funding Information:
We acknowledge support from the RIGSS JIP (Fugro, Total, Woodside and Shell), the EPSRC Offshore Renewable Energy Supergen Hub (grant EP/S000747/ 1) and Prof. Mark Randolph and Dr Mark Schneider.
Publisher Copyright:
© 2022 the Author(s).
Venue - Dates:
5th International Symposium on Cone Penetration Testing, CPT 2022, , Bologna, Italy, 2022-06-08 - 2022-06-10
Identifiers
Local EPrints ID: 477481
URI: http://eprints.soton.ac.uk/id/eprint/477481
PURE UUID: 8e544ef4-52ac-42ae-8e43-a864548d244f
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Date deposited: 06 Jun 2023 17:18
Last modified: 18 Mar 2024 03:42
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Contributors
Author:
S. A. Stanier
Author:
H. Mohr
Editor:
Guido Gottardi
Editor:
Laura Tonni
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