Determination of macro-scale soil properties from pore scale structures: Image based modelling of poroelastic structures
Determination of macro-scale soil properties from pore scale structures: Image based modelling of poroelastic structures
We show how a combination of X-ray Computed Tomography and image based modelling can be used to calculate the effect of moisture content and compaction on the macroscopic structural properties of soil. Our method is based on the equations derived in [1], which we have extended so they can be directly applied to segmented images obtained from X-ray Computed Tomography. We assume that the soils are composed of air filled pore space, solid mineral grains and a mixed phase composed of both clay particles and water. We considered three different initial soil treatments, comprised of two different compaction levels and two different moisture contents. We found that the effective properties of the soils were unaffected by compaction over the range tested in this paper. However, changing the moisture content significantly altered the hydraulic and mechanical properties of the soils. A key strength of this method is that it enables the optimization,or even design of soils composed from different constituents, with specific mechanical and hydraulic properties.
Daly, Keith
36d0472c-85da-43ba-b0ef-4705c3409565
Keyes, Samuel
ed3ee62b-e257-4b92-922c-023b232e8145
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe
July 2018
Daly, Keith
36d0472c-85da-43ba-b0ef-4705c3409565
Keyes, Samuel
ed3ee62b-e257-4b92-922c-023b232e8145
Roose, Tiina
3581ab5b-71e1-4897-8d88-59f13f3bccfe
Daly, Keith, Keyes, Samuel and Roose, Tiina
(2018)
Determination of macro-scale soil properties from pore scale structures: Image based modelling of poroelastic structures.
Proceedings of the Royal Society A, 474 (2215).
(doi:10.1098/rspa.2017.0745).
Abstract
We show how a combination of X-ray Computed Tomography and image based modelling can be used to calculate the effect of moisture content and compaction on the macroscopic structural properties of soil. Our method is based on the equations derived in [1], which we have extended so they can be directly applied to segmented images obtained from X-ray Computed Tomography. We assume that the soils are composed of air filled pore space, solid mineral grains and a mixed phase composed of both clay particles and water. We considered three different initial soil treatments, comprised of two different compaction levels and two different moisture contents. We found that the effective properties of the soils were unaffected by compaction over the range tested in this paper. However, changing the moisture content significantly altered the hydraulic and mechanical properties of the soils. A key strength of this method is that it enables the optimization,or even design of soils composed from different constituents, with specific mechanical and hydraulic properties.
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Accepted/In Press date: 6 June 2018
e-pub ahead of print date: 11 July 2018
Published date: July 2018
Identifiers
Local EPrints ID: 421320
URI: http://eprints.soton.ac.uk/id/eprint/421320
ISSN: 1364-5021
PURE UUID: a446765d-4087-44b7-82e9-0a9c8135a96b
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Date deposited: 01 Jun 2018 16:30
Last modified: 16 Mar 2024 06:41
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Author:
Keith Daly
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