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Measurement of three-dimensional displacement field in piled embankments using synchrotron X-ray tomography

journal contribution
posted on 2019-01-01, 00:00 authored by L King, A Bouazza, A Maksimenko, Will GatesWill Gates, S Dubsky
The measurement of displacement fields by nondestructive imaging techniques opens up the potential to study the pre-failure mechanisms of a wide range of geotechnical problems within physical models. With the advancement of imaging technologies, it has become possible to achieve high-resolution three-dimensional computed tomography volumes of relatively large samples, which may have previously resulted in excessively long scan times or significant imaging artefacts. Imaging of small-scale model piled embankments (142 mm diameter) comprising sand was undertaken using the imaging and medical beamline at the Australian Synchrotron. The monochromatic X-ray beam produced high-resolution reconstructed volumes with a fine texture due to the size and mineralogy of the sand grains as well as the phase contrast enhancement achieved by the monochromatic X-ray beam. The reconstructed volumes were well suited to the application of digital volume correlation, which utilizes cross-correlation techniques to estimate three-dimensional full-field displacement vectors. The output provides insight into the strain localizations that develop within piled embankments and an example of how advanced imaging techniques can be utilized to study the kinematics of physical models.

History

Journal

Canadian geotechnical journal

Volume

56

Issue

6

Pagination

885 - 892

Publisher

Canadian Science Publishing

Location

Ottawa, Canada

ISSN

0008-3674

eISSN

1208-6010

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2019, Canadian Science Publishing