Searched for: subject%3A%22open%255C+filter%22
(1 - 14 of 14)
document
Lengkeek, Robert (author)
This study investigates the use of an open filter in a land reclamation structure. The possibility of replacing the geotextile that secures the core-backfill interface with a granular filter has been investigated. This is easier to install and therefore a potential cost-saving. Experiments have been done to determine the influence of various...
master thesis 2022
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Boersma, Floris (author)
This thesis is the third study of a research line that focuses on the interface stability of a rubble mound sand retaining structure. The type of interface considered is a geometrically open granular filter because of its economical and constructional benefits. The stability of an open filter structure in which the base layer is located on top...
master thesis 2020
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van de Ven, Daan (author)
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...
master thesis 2019
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Hollander, W. (author)
A filter can be applied to protect a bed against scour. Normally, these filters are geometrically closed, to prevent winnowing of the base material through the filter. However, geometrically closed filters are expensive and difficult to realize in the field. Geometrically open filters can serve as an alternative. Within an open filter, the pores...
master thesis 2015
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Van de Sande, S.A.H. (author), Uijttewaal, W.S.J. (author), Verheij, H.J. (author)
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...
conference paper 2014
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Papadopoulos, D. (author)
Scour formation at the toe of a rubble mound breakwater can lead to abrupt failure. Nowadays, counteraction of scour via geometrically closed filter rules, geotextiles or combinations is the common practice. Alternatively, in specific cases the use of geometrically open filters can save significant amount of time and decrease constructional...
master thesis 2012
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Van de Sande, S.A.H. (author)
Granular filters are used for protection against scour and erosion. For a proper functioning it is necessary that interfaces between the filter structure, the subsoil and the water flowing above the filter structure are stable. Stability means that there is no transport of subsoil material through the filter to the water above the filter, and...
master thesis 2012
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Verheij, H.J. (author), Hoffmans, G. (author), Den Adel, H. (author), Akkerman, G.J. (author), Giri, S. (author)
A desk study has been carried out regarding interface stability of granular filter structures. Actually, the project focuses on two particular aspects: (1) interface stability as function of the thickness of the filter layer consisting of standard armourstone gradings, and (2) interface stability of gravel mixtures with a wide gradation The...
report 2009
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Ockeloen, W.J. (author)
Thesis study into an alternative design for breakwaters made of granular materials like sand and quarry stone. In this design, the breakwater is constructed of a sand core and a layer of large stones directly on top of it, without the traditional filter layers in-between. The single layer of stones serves as one open filter layer that has to...
master thesis 2007
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Hoffmans, G.J.C.M. (author), Den Adel, H. (author), Verheij, H.J. (author)
Scour is a natural phenomenon caused by the flow of water in rivers and streams and occurs as a part of the morphological changes caused by rivers or as a result of man-made structures. For the Dutch Delta Works hydraulic structures were often constructed on fines with loose packing. To guarantee the geotechnical stability of these structures...
report 2000
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Booij, R. (author)
Deze notitie beschrijft de resultaten van een inleidend onderzoek naar de mechanismen van de erosie van de basislaag onder geometrisch open filters. Hierbij wordt in eerste instantie uitgegaan van de beter onderzochte erosie van de bodem van een waterloop zonder beschermende filterlaag. Op basis van metingen van Van Os (1998) in een inleidend...
report 1998
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Hauer, M. (author), Van der Meulen, T. (author)
Aan het begin van deze studie bestond onduidelijkheid over de vraag in hoeverre het eventueel falen van een geometrisch open filterconstructie in een open waterloop nu het gevolg zou zijn van onzekerheden met betrekking tot het bij het ontwerp gehanteerde rekenmodel, of juist van onzekerheden met betrekking t o t onnauwkeurigheden bij de bouw...
report 1997
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Hauer, M. (author)
Tijdens de laatste fase van het project FILTERS zijn (losstaand van dit project) in het Laboratorium voor Vloeistofmechanica van de TU Delft ook proeven uitgevoerd. Deze proeven betreffen de metingen die Patrick van Os ten behoeve van zijn fstudeerscriptie heeft verricht. Het verslag van de proeven van Patrick Van Os was op het moment van...
report 1997
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Hauer, M. (author), Van der Meulen, T. (author)
Deze studie moet worden opgevat als een vervolg op de publicaties van lkeya [4], Shimizu, Tsujimoto & Nakagawa (8] en Hoffmans [5], waarin de stroming in een poreus medium werd beschreven voor de situatie van een in principe oneindig dikke filterlaag grenzend aan een open waterloop met een uniform, stationair stroombeeld. Op basis van...
report 1996
Searched for: subject%3A%22open%255C+filter%22
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