The University of Southampton
University of Southampton Institutional Repository

Synchronised multi-scale image analysis of soil deformations

Synchronised multi-scale image analysis of soil deformations
Synchronised multi-scale image analysis of soil deformations

New apparatus and techniques for performing synchronised multi-scale particle image velocimetry or digital image correlation (PIV/DIC) soil deformation measurements have been developed. A central camera records a full field of view (FoV) of the model capturing the ‘macro’ deformation mechanism and the boundaries of the model. Simultaneously, an adjacent slave camera records a subset of the full FoV capturing the ‘micro’ soil response in a region of special interest, such as under the corner of footing. The ‘micro’ FoV images have higher resolution in terms of particle/pixel size ratio (d/p), resulting in the ability to measure localised deformations that are invisible to lower resolution images. Recommendations are made with respect to appropriate subset size and spacing for highresolution images. A photogrammetric correction process requiring a small number of static control points is proposed and the performance is validated against a conventional photogrammetric calibration utilising a large array of static control points. Lastly, results from a validation experiment are presented comparing the PIV/DIC output from the ‘macro’ and ‘micro’ FoV, illustrating that: (a) the photogrammetric correction method proposed is robust and (b) that there has been an improvement in spatial resolution of the strain measurements that can be obtained through the ‘micro’ FoV camera.

Foundations, Geotechnical engineering, Models (physical)
1346-213X
53-71
Teng, Yining
76868858-8de3-4e1d-9f75-367562088c8a
Stanier, Samuel A.
b11049bd-44ee-4db9-9e66-a5ea20a3c70b
Gourvenec, Susan M.
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
Teng, Yining
76868858-8de3-4e1d-9f75-367562088c8a
Stanier, Samuel A.
b11049bd-44ee-4db9-9e66-a5ea20a3c70b
Gourvenec, Susan M.
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8

Teng, Yining, Stanier, Samuel A. and Gourvenec, Susan M. (2017) Synchronised multi-scale image analysis of soil deformations. International Journal of Physical Modelling in Geotechnics, 17 (1), 53-71. (doi:10.1680/jphmg.15.00058).

Record type: Article

Abstract

New apparatus and techniques for performing synchronised multi-scale particle image velocimetry or digital image correlation (PIV/DIC) soil deformation measurements have been developed. A central camera records a full field of view (FoV) of the model capturing the ‘macro’ deformation mechanism and the boundaries of the model. Simultaneously, an adjacent slave camera records a subset of the full FoV capturing the ‘micro’ soil response in a region of special interest, such as under the corner of footing. The ‘micro’ FoV images have higher resolution in terms of particle/pixel size ratio (d/p), resulting in the ability to measure localised deformations that are invisible to lower resolution images. Recommendations are made with respect to appropriate subset size and spacing for highresolution images. A photogrammetric correction process requiring a small number of static control points is proposed and the performance is validated against a conventional photogrammetric calibration utilising a large array of static control points. Lastly, results from a validation experiment are presented comparing the PIV/DIC output from the ‘macro’ and ‘micro’ FoV, illustrating that: (a) the photogrammetric correction method proposed is robust and (b) that there has been an improvement in spatial resolution of the strain measurements that can be obtained through the ‘micro’ FoV camera.

Text
2017 International Journal of Physical Modelling in Geotechnics 17_1_53-71 Teng et al. - Accepted Manuscript
Download (1MB)

More information

e-pub ahead of print date: 24 February 2017
Published date: 1 March 2017
Keywords: Foundations, Geotechnical engineering, Models (physical)

Identifiers

Local EPrints ID: 414898
URI: http://eprints.soton.ac.uk/id/eprint/414898
ISSN: 1346-213X
PURE UUID: 61e7329d-ab15-4221-ab27-df875576f237
ORCID for Susan M. Gourvenec: ORCID iD orcid.org/0000-0002-2628-7914

Catalogue record

Date deposited: 13 Oct 2017 16:30
Last modified: 16 Mar 2024 04:31

Export record

Altmetrics

Contributors

Author: Yining Teng
Author: Samuel A. Stanier

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×