Physical modelling of in-ground waste repository capping systems
Physical modelling of in-ground waste repository capping systems
This paper describes a series of geotechnical centrifuge tests carried out to investigate aspects of landfill capping system performance, in the context of a low-level radioactive waste disposal site. The effects of the basic cap geometry (sloping or flat) and the subsidence pattern imposed as the underlying waste degrades (ramp or step, i.e. slope or displacement discontinuity) are shown to influence cap performance. The effect of moving the toe of a sloping cap outside the landfill subsidence zone, thereby increasing the depth of inert fill below the cap, is also shown to be effective in limiting the displacements transmitted to the resistive layer. Analysis of the runoff from sloping capping systems shows that if the resistive layer fails, there is the potential for the infiltration rate through the cap to increase from near zero to almost 100% of the incident rainfall.
landfill, models (physical), waste management & disposal
53-65
Richards, David J.
a58ea81e-443d-4dab-8d97-55d76a43d57e
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
2011
Richards, David J.
a58ea81e-443d-4dab-8d97-55d76a43d57e
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Richards, David J. and Powrie, William
(2011)
Physical modelling of in-ground waste repository capping systems.
Proceedings of the Institution of Civil Engineers - Waste and Resource Management, 164 (1), .
(doi:10.1680/warm.2011.164.1.53).
Abstract
This paper describes a series of geotechnical centrifuge tests carried out to investigate aspects of landfill capping system performance, in the context of a low-level radioactive waste disposal site. The effects of the basic cap geometry (sloping or flat) and the subsidence pattern imposed as the underlying waste degrades (ramp or step, i.e. slope or displacement discontinuity) are shown to influence cap performance. The effect of moving the toe of a sloping cap outside the landfill subsidence zone, thereby increasing the depth of inert fill below the cap, is also shown to be effective in limiting the displacements transmitted to the resistive layer. Analysis of the runoff from sloping capping systems shows that if the resistive layer fails, there is the potential for the infiltration rate through the cap to increase from near zero to almost 100% of the incident rainfall.
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Published date: 2011
Keywords:
landfill, models (physical), waste management & disposal
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Local EPrints ID: 186389
URI: http://eprints.soton.ac.uk/id/eprint/186389
ISSN: 1747-6526
PURE UUID: c774af35-5dd0-4b41-a6c3-e528d44bd001
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Date deposited: 13 May 2011 09:15
Last modified: 15 Mar 2024 02:47
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