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Controlled Yielding of the Lateral Boundaries of Soil Retaining Structures

by Alan McGown, Univ of Strathclyde, Scotl, Univ of Strathclyde, Scotland,
Kamal Z. Andrawes, Univ of Strathclyde, Scotl, Univ of Strathclyde, Scotland,
Richard T. Murray, Univ of Strathclyde, Scotl, Univ of Strathclyde, Scotland,



Document Type: Proceeding Paper

Part of: Geosynthetics for Soil Improvement

Abstract:

Lateral expansion of conventional or reinforced soil backfills is necessary to establish and maintain the minimum lateral stresses on soil retaining structures. Laboratory studies are detailed which show that these minimum conditions can be achieved by the provision of a compressible layer on the rear of the wall or facing panel units. For unreinforced backfill this will mean achieving lateral forces on the rear of the wall at or near 'active' values. For reinforced backfills, the lateral forces can be less than 'active' values; the amount being dependent on the number and stiffness of the reinforcing layers. For incremental construction, the resulting distribution of lateral stresses is shown to differ significantly from the hydrostatic forms derived on the basis of 'at rest' or 'active' conditions.

Subject Headings: Soil stabilization | Retaining structures | Soil stress | Lateral stress | Backfills | Soil structures | Lateral forces

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