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In situ measurement of the dynamic penetration of free-fall projectiles in soft soils using a low-cost inertial measurement unit

In situ measurement of the dynamic penetration of free-fall projectiles in soft soils using a low-cost inertial measurement unit
In situ measurement of the dynamic penetration of free-fall projectiles in soft soils using a low-cost inertial measurement unit
Six degree-of-freedom motion data from projectiles free-falling through water and embedding in soft soil are measured using a low-cost inertial measurement unit, consisting of a tri-axis accelerometer and a three-component gyroscope. A comprehensive framework for interpreting the measured data is described and the merit of this framework is demonstrated by considering sample test data for free-falling projectiles that gain velocity as they fall through water and self-embed in the underlying soft clay. The paper shows the importance of considering such motion data from an appropriate reference frame by showing good agreement in embedment depth data derived from the motion data with independent direct measurements. Motion data derived from the inertial measurement unit are used to calibrate a predictive model for calculating the final embedment depth of a dynamically installed anchor.
0149-6115
1-17
Blake, A.P.
e0438bea-cfc4-4373-b100-8b9768ddc56f
O'Loughlin, C.D.
b0fc277d-6301-45fd-a2a5-438655f822b0
Morton, J.P.
44775484-92cc-4aaf-b49d-f83f8c3be260
O'Beirne, C.
17e87fcb-cc6f-4ebe-9ee6-03fa6d4bc606
Gaudin, C.
4d1197f0-7c69-4301-8877-33f840784685
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Blake, A.P.
e0438bea-cfc4-4373-b100-8b9768ddc56f
O'Loughlin, C.D.
b0fc277d-6301-45fd-a2a5-438655f822b0
Morton, J.P.
44775484-92cc-4aaf-b49d-f83f8c3be260
O'Beirne, C.
17e87fcb-cc6f-4ebe-9ee6-03fa6d4bc606
Gaudin, C.
4d1197f0-7c69-4301-8877-33f840784685
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93

Blake, A.P., O'Loughlin, C.D., Morton, J.P., O'Beirne, C., Gaudin, C. and White, D.J. (2016) In situ measurement of the dynamic penetration of free-fall projectiles in soft soils using a low-cost inertial measurement unit. Geotechnical Testing Journal, 39 (2), 1-17. (doi:10.1520/GTJ20140135).

Record type: Article

Abstract

Six degree-of-freedom motion data from projectiles free-falling through water and embedding in soft soil are measured using a low-cost inertial measurement unit, consisting of a tri-axis accelerometer and a three-component gyroscope. A comprehensive framework for interpreting the measured data is described and the merit of this framework is demonstrated by considering sample test data for free-falling projectiles that gain velocity as they fall through water and self-embed in the underlying soft clay. The paper shows the importance of considering such motion data from an appropriate reference frame by showing good agreement in embedment depth data derived from the motion data with independent direct measurements. Motion data derived from the inertial measurement unit are used to calibrate a predictive model for calculating the final embedment depth of a dynamically installed anchor.

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More information

Accepted/In Press date: 28 October 2015
Published date: 1 March 2016
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 403625
URI: https://eprints.soton.ac.uk/id/eprint/403625
ISSN: 0149-6115
PURE UUID: a2d5be7e-b810-4d95-b676-9cb553e59b98
ORCID for D.J. White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 06 Dec 2016 14:03
Last modified: 20 Jul 2019 00:25

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