Validation and Optimization of a Design Formula for Stable Geometrically Open Filter Structures

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Published Date

15-06-2014

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Source:

ICCE 2014: Proceedings of 34th International Conference on Coastal Engineering, Seoul, Korea, 15-20 June 2014

Faculty

Civil Engineering and Geosciences

Department

Hydraulic Engineering

Abstract

Granular filters are used for protection against scour and erosion of base material. For a proper functioning it is necessary that at the interfaces between the filter structure, the subsoil and the water flowing above the filter structure no material will be transported. Different types of granular filters can be distinguished, this paper focuses on stable geometrically open filter structures under current attack. Hoffmans (2012) developed a design formula for stable geometrically open filters. This paper presents the validation and an optimization of the design formula based on performed model tests. It is shown that the current design formula is too conservative. The proposed improvements allows for a wider range of applicability.