Print Email Facebook Twitter Modelling the equalizing process of rockfill dumps with a plough: Subsea cut and transport processes Title Modelling the equalizing process of rockfill dumps with a plough: Subsea cut and transport processes Author Kranendonk, W.J. Contributor Van Rhee, C. (mentor) Van de Schrieck, G.L.M. (mentor) Verhagen, H.J. (mentor) Faculty Civil Engineering and Geosciences Department Hydraulic Engineering Programme Coastal Engineering and Dregdging Engineering Date 2011-06-17 Abstract A way to equalize granular rockfill dumps at a sea or river bed is the use of a plough. A plough can be modeled as a set of straight blades in sequence. Several cutting models for dry and saturated sand are present in the literature. In cutting coarse material, the increase in pore water pressures caused by dilatancy of the grain structure play a minor role. This results in a different shape of the layer cut than for traditional cutting methods in fine soils. The layer cut has a limited surface slope resulting in grains rolling down under the angle of repose ?. Failure of the grain structure in coarse material depends mainly on the gravitational, shear and inertial forces between grains. This master thesis gives an analytical model for cutting rockfill larger than medium coarse sand with straight cutting blades (Chapter 4.2). A description is given of the important processes involved in equalizing with a plough and the different stages of filling. The analytical model is realized by use of models made by S.Miedema for cutting saturated sand and models for cutting dry sand by Hettiaratchi, and Reece (1966). The analytical model is verified by performing a physical scale model. The scale model is used to attempt to simulate the process in a discrete element computer model EDEM. Subject equalizingploughrockfillcuttingcoarsediscretecontinuumEDEM To reference this document use: http://resolver.tudelft.nl/uuid:bcdacf6b-2716-46cd-9101-0488048c9daf Embargo date 2013-01-01 Related item https://doi.org/10.4121/uuid:10939010-c4f9-4046-b72f-4bf06cc39adf Part of collection Student theses Document type master thesis Rights (c) 2011 Kranendonk, W.J. Files PDF Final_Modelling_the_equal ... plough.pdf 7.41 MB Close viewer /islandora/object/uuid:bcdacf6b-2716-46cd-9101-0488048c9daf/datastream/OBJ/view