ABSTRACT
Impact of stones or blocks on a geotextile, for example during construction of a coastal engineering structure, can damage the geotextile. Using the results of laboratory tests, it was shown that, apart from the robustness of the geotextile and its maximum elongation, the friction between the falling stone and the geotextile and between the geotextile and the subsoil is of importance for the risk of damage to the geotextile. Furthermore, it was found, as could be expected, that the shape of the stone has a large influence. An analytical calculation model was developed and compared with the results of numerical calculations. Results show the influence of friction between the sand the geotextile and the stone. The influence of the shape of the blocks according to the model is less than expected based on laboratory tests. Overall elongation is the dominant failure mechanism for woven geotextiles, local elongation due to friction around the tip of the penetrating block, is dominant for non-wovens.
