Searched for: subject:"rubble"
(1 - 20 of 52)

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Bridges, Robert (author), Riska, K.A. (author), Hopkins, Mark (author), Wei, Ying (author)
Ice encroachment is the accumulation of ice atop a platform and results when ice drifts against a platform. Most often this occurs in shallow water but in principle can occur in deep water if the ice drift length is long enough. As the ice drifts against the platform it is broken and generates rubble and ice piles in front of the platform, and...
journal article 2019
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Hofland, B. (author), Arefin, Syed Shamsil (author), van der Lem, Cock (author), van Gent, Marcel (author)
This paper describes a method to measure the rocking motion of lab-scale armour units. Sensors as found in mobile phones are used. These sensors, data-storage and battery are all embedded in the model units, such that they can be applied without wires attached to them. The technique is applied to double-layer units in order to compare the...
conference paper 2018
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Hofland, B. (author), Rosa-Santos, Paulo (author), Taveira-Pinto, Francisco (author), de Almeida Sousa, E. (author), Lemos, Rute (author), Mendonça, A. (author), Juana Fortes, C (author)
This paper studies novel ways to evaluate armour damage in physical models of coastal structures. High-resolution damage data for reference rubble mound breakwaters obtained under the HYDRALAB+ joint-research project are analysed and discussed. These tests are used to analyse the way to describe damage, the influence of the sequence of testing,...
conference paper 2017
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Mueller, Anette (author), Liebezeit, Steffen (author), Leydolph, Barbara (author), Palzer, Ulrich (author)
At present, heterogeneous and fine-grained masonry rubble can only be recycled at very low level. To overcome this limitation, the material was employed as feedstock for the production of lightweight aggregates in a thermal process similar to that used in the manufacture of expanded clay and expanded slate. To that end, the fundamental...
conference paper 2017
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Van den Bos, J. (author), Verhagen, H.J. (author), Zijlema, M. (author), Mellink, B. (author)
A more detailed understanding of porous flow inside a rubble-mound structure may have potential benefits in breakwater design. Numerical models are expected to be a useful additional research tool in this field, provided that their calculation results can be validated against measurements. This paper presents the results of a systematic effort...
conference paper 2014
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Latham, John Paul (author), Xiang, Jiansheng (author), Anastasaki, Eleni (author), Guo, Liwei (author), Karantzoulis, Nikolaos (author), Viré, A.C. (author), Pain, Christopher (author)
Numerical modelling has the potential to probe the complexity of the interacting physics of rubble mound armour systems. Through forward modelling of armour unit packs, stochastic variables such as unit displacement and maximum contact force per unit during an external oscillatory disturbance can be predicted. The combined finite-discrete...
conference paper 2014
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Mulders, P.H.M. (author), Verhagen, H.J. (author)
A new series of physical model tests were conducted to analyse the behaviour of a breakwater core when it becomes exposed to wave attack. The emphasis of this research was on the measured influence of a wide stone grading on both the deformation of a breakwater trunk and the occurring longshore transport. This behaviour was investigated for both...
conference paper 2012
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Van de Koppel, M.A. (author), Muilwijk, M. (author), Verhagen, H.J. (author)
A physical model study on the row averaged static and dynamic load on the bottom row of single layer armour units in order to investigate the influence of various parameters such as the number of rows on the slope of a breakwater and the initial relative packing density.
conference paper 2012
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Lioutas, A. (author), Smith, G.M. (author), Verhagen, H.J. (author)
The scope of this research is to find an empirical formula to describe the distribution of wave overtopping in the region behind the crest. A physical model was set up in which irregular waves were generated. In order to find a formula which adequately describes the test observations, the influence of several parameters has been analysed. The...
conference paper 2012
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Kik, R. (author), Van den Bos, J.P. (author), Maertens, J. (author), Verhagen, H.J. (author), Van der Meer, J.W. (author)
Different layer design of a rock slope and under layers has a large effect on the strengths on the rock slope itself. In the stability formula developed of VAN DER MEER [1988] this effect is represented by the term Notional Permeability with symbol P. A more open, or permeable, structure underneath the armour layer has the ability to dissipate...
conference paper 2012
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VanLishout, V. (author), Verhagen, H.J. (author), Troch, P. (author)
There is a growing interest in the application of submerged rubble mound breakwaters as coastal defence structures. As their defensive ability highly depends on the amount of wave energy remaining at their lee side, the accurate prediction of the energy in the lee of such structures is of utmost importance. Past experiments have shown that the...
conference paper 2011
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Vanlishout, V. (author), Verhagen, H.J. (author), Troch, P. (author)
There is a growing interest in the application of submerged rubble mound breakwaters as coastal defence structures. As their defensive ability highly depends on the amount of wave energy remaining at their lee side, the accurate prediction of the energy in the lee of such structures is of utmost importance. Past experiments have shown that the...
conference paper 2010
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Baart, S. (author), Ebbens, R. (author), Nammuni-Krohn, J. (author), Verhagen, H.J. (author)
Present design tools, as found in the Rock Manual or Coastal Engineering Manual, for the determination of toe rock size for rubble mound breakwaters are based on test data with a large spread: data is relatively dispersed around the centre and descriptive equations have limited applicability ranges. New research has been undertaken to contribute...
conference paper 2010
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Viet, N.D. (author), Verhagen, H.J. (author), Van Gelder, P.H.A.J.M. (author), Vrijling, J.K. (author)
An appropriate assignment of probabilities of failure to subsystems and components in a structural system can bring a minimum of costs and risk. In this paper, a method for economic optimisation of rubble mound breakwaters using pre-assigned probabilities of failure is presented. Application to a design case shows that the proposed method is...
conference paper 2008
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Viet, N.D. (author), Verhagen, H.J. (author), Van Gelder, P.H.A.J.M. (author), Vrijling, J.K. (author)
In 2006 a Vietnamese Engineering Consultancy Company carried out a design study of a Naval Base at the location of the South of Doson Peninsula in Vietnam. A deterministic approach applied to the conceptual design of the breakwater system of the Naval Base resulted in a cross-section with a big armour layer and a rather low crest level. This...
conference paper 2008
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Lykke Andersen, T. (author)
An introduction to the principles and fundamentals of designing rubble mound breakwaters, led to the definition of two important white spots in designing rubble mound breakwaters. These were selected for further investigations in the present thesis. 1. Design of berm breakwaters: A generally lack of data and design formulae was identifed, but...
report 2006
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Tirindelli, M. (author), Lamberti, A. (author)
The present report, produced within the framework of the EU funded project DELOS, attempts to recognise and analyse main scale effects in the physical modeHing of rubble mound breakwaters used in offshore and coastal engineering. Scale effects appear in physical modeHing because the ratios between the farces of interest, as present in prototype,...
report 2004
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Van der Graaf, A. (author)
For many decades, stony debris from building and demolition sites was reused as road building material. Until recently there was no need to look for other uses for this mixture of concrete and masonry rubble. However, now that our supplies of marl and gravel (two of the three ingredients of mortar and concrete) are dwindling and prices are...
journal article 2004
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Mosselman, E. (author), Akkerman, G.J. (author), Verheij, H.J. (author), Hoffmans, G.J.C.M. (author), Jongeling, T.H.G. (author), Petit, H.A.H. (author)
report 2000
document
Kant, G. (author)
report 1999
Searched for: subject:"rubble"
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