The friction model developed by Terzaghi is used to calculate the vertical stress on the geosynthetic reinforcement (GR) in a 2D piled embankment. The model developed is based on Terzaghi's (1943) calculation of the stresses in a trapdoor experiment. In the present paper, it is assumed that the deformation of a geosynthetic reinforcement should not be simulated with one trapdoor, but with a series of trapdoors. For a 2D situation this results in an inverse triangular load distribution on the GR. This has also been found in experiments. The results show that the GR itself has a significant influence on the load distribution and experiments without GR should not be used to develop calculation models for the situation with GR.
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