The pressure of clay backfill against retaining structures
The pressure of clay backfill against retaining structures
This paper investigates the pressures exerted by clay backfills against retaining structures. The lateral pressures are developed during three main phases: placement, compaction, and burial; horizontal total stress reduction at constant moisture content; and swelling or consolidation under approximately constant vertical stress. Experimental data from laboratory and pilot-scale studies, using clays of intermediate and high plasticity, are presented and used to assess the magnitude of the pressure changes in each phase. The process of compaction is examined and it is concluded that previously developed theories for assessing the pressures on retaining walls developed by compaction of granular soils are inapplicable for cohesive soils. The factors controlling the swelling of cohesive backfill are reviewed and results from a preliminary numerical study are used to provide an indication of the likely effects of plasticity and placement moisture content.
earth pressure, retaining walls, clay, compaction, swelling
282-297
Clayton, C.R.I.
8397d691-b35b-4d3f-a6d8-40678f233869
Symons, I.F.
38fa73db-81f7-4ea6-a666-b68c1905536a
Hiedra-Cobo, J.C.
9aeb74ab-2134-432b-a43d-e4be62e0bacc
1991
Clayton, C.R.I.
8397d691-b35b-4d3f-a6d8-40678f233869
Symons, I.F.
38fa73db-81f7-4ea6-a666-b68c1905536a
Hiedra-Cobo, J.C.
9aeb74ab-2134-432b-a43d-e4be62e0bacc
Clayton, C.R.I., Symons, I.F. and Hiedra-Cobo, J.C.
(1991)
The pressure of clay backfill against retaining structures.
Canadian Geotechnical Journal, 28 (2), .
(doi:10.1139/t91-034).
Abstract
This paper investigates the pressures exerted by clay backfills against retaining structures. The lateral pressures are developed during three main phases: placement, compaction, and burial; horizontal total stress reduction at constant moisture content; and swelling or consolidation under approximately constant vertical stress. Experimental data from laboratory and pilot-scale studies, using clays of intermediate and high plasticity, are presented and used to assess the magnitude of the pressure changes in each phase. The process of compaction is examined and it is concluded that previously developed theories for assessing the pressures on retaining walls developed by compaction of granular soils are inapplicable for cohesive soils. The factors controlling the swelling of cohesive backfill are reviewed and results from a preliminary numerical study are used to provide an indication of the likely effects of plasticity and placement moisture content.
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Published date: 1991
Keywords:
earth pressure, retaining walls, clay, compaction, swelling
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Local EPrints ID: 74843
URI: http://eprints.soton.ac.uk/id/eprint/74843
ISSN: 0008-3674
PURE UUID: 53b6dc56-a9b7-4897-8683-a4919c8c2c59
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Date deposited: 11 Mar 2010
Last modified: 14 Mar 2024 02:43
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Author:
I.F. Symons
Author:
J.C. Hiedra-Cobo
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