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Use of flexible facing for soil nail walls.
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2011-11-01
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[PDF-3.54 MB]
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Edition:Final report; Sept. 2009¿Feb. 2011.
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Abstract:Soil nail walls are a widely used technology for retaining vertical and nearly vertical cuts in soil. A
significant portion of the cost of soil nail wall construction is related to the construction of a reinforced
concrete face. The potential for use of a flexible facing design for soil nail walls to replace reinforced
concrete facing was evaluated using three-dimensional finite difference modeling and physical testing of a
1.5 meter by 1.5 meter unit cell of a soil nail wall in clay. A steel mesh form of flexible facing was used as a
substitute for concrete. The finite difference model predicted large vertical and horizontal deformations for
surcharges of approximately 5 psi. In the physical testing, the flexible facing products performed well with
regard to strength, but the facing experienced large vertical and horizontal deformations that were consistent
with the numerical modeling. Based on these results, it is recommended that use of flexible facing as a
substitute for reinforced concrete be limited to non-critical structures where large vertical and horizontal
deformations are acceptable.
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