Granular open filter in rubble mound sand retaining structures
Physical model tests of a negative geometrically open filter layer
Daan van de Ven (TU Delft - Civil Engineering & Geosciences)
Bas Hofland – Mentor (TU Delft - Hydraulic Structures and Flood Risk)
Alessandro Antonini – Graduation committee member (TU Delft - Coastal Engineering)
Greg Smith – Graduation committee member (TU Delft - Coastal Engineering)
D.C.P. van Kester – Graduation committee member (Van Oord)
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Abstract
For the use of open filters in land reclamations new guidelines are needed as no research is currently done for the configuration of a sand layer is placed on top of a filter layer. This research focuses purely on the interaction between cyclic motions and the described sand-filter layer. A numerical OpenFOAM model is used to extract the order of magnitude of the parallel and perpendicular gradients from a numerically designed filter. With these gradients a model setup is designed where five sand-filter combinations are tested. All combinations are tested for both parallel and perpendicular gradients, which resulted in a range of critical gradients for both directions.