Abstract
A numerical model is formulated to assess tensile membrane action in a two-layer soil system reinforced by a geotextile. The analysis is based on a two-dimenasional plane strain model of the static equilibrium of an elastic membrane placed at the interface between a granular base and a compressible subgrade. The theory of stochastic stress diffusion in particulate media is used to describe the transmission of load through the gravel base, and a Winkler model is assumed for the subgrade. The model incorporates a Mohr-Coulomb criterion for the frictional interaction at the gravel-fabric interface, and it allows for incomplete anchorage. The numerical solution is provided by an iterative finite difference scheme. The influence of the anchorage conditions on the load-deflection response of the system is illustrated, and it is shown that the performance of high tensile modulus fabrics are affected to a higher degree by an incomplete anchorage than lower modulus fabrics.
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