Coastal Structures and Solutions to Coastal Disasters Joint Conference 2015
Exploring the Need for Geotextile Filters for Rubble Bunds Retaining Sand-Fill Islands
Publication: Coastal Structures and Solutions to Coastal Disasters 2015: Resilient Coastal Communities
I. ABSTRACT
This paper will explore the process of ‘suffusion’–the movement of fine material through the voids of a granular matrix with particular reference to the retention of sand-fill by a rubble bund. Guidance on suffusion has hitherto been derived for rock-fill dams, where hydraulic gradients are steep, and persist for the life of the dam. In contrast, sand protected by rubble mound bunds will experience hydraulic gradients that are much smaller, and intermittent. The paper presents a series of empirical analyses and physical model tests for an idealised defence in which detailed pressure measurements within the rubble bund were used to define representative hydraulic gradients. Test data from studies on onset of movement of fine materials reported in 1991 were then used to identify where hydraulic gradients were sufficiently reduced to avoid significant loss of sand-fill.
Get full access to this article
View all available purchase options and get full access to this chapter.
ACKNOWLEDGEMENTS
The research work presented here was primarily funded by HR Wallingford and conducted in the Coastal Structures Section. The previous testing and analysis were supported by the Department of Environment under contract PECD 7/6/108. The first author is grateful to William Allsop and Tim Pullen for guidance and supervision. The authors also wish to acknowledge support provided by the HR Wallingford Froude Modelling Hall staff.
REFERENCES
Allsop N.W.H. & William A.F. (1991) Hydro-geotechnical performance of rubble mound breakwaters, Report SR 183, February 1991, HR Wallingford.
Allsop NWH, Briggs M.G., Denziloe T., & Skinner A.E. (1991) Alderney breakwater: the quest for a ‘final’ solution Proc. Conf. Coastal Structures and Breakwaters, pp 303-320, ISBN 0-7277-1672-7, publn Thomas Telford, London.
Burcharth, H.F., Liu, Z. & Troch, P. (1999) Scaling of core material in rubble mound breakwater model tests. Proc. Int. Conf. on Coastal and Port Engineering in Developing Countries (COPEDEC), Cape Town
Cantelmo C, Allsop W & Dunn S (2010) Wave pressures in and under rubble mound breakwaters, Proc. 3rd Int. CoastLab Conf.
Cantelmo C, Dunn S, Cuomo G, & Allsop W (2011) Hydro-geotechnical stability of rubble mound breakwaters under wave action, Proc. Conf. Coastal Structures 2011, Yokohama.
CIRIA, CUR, CETMEF (2007) The Rock Manual. The use of rock in hydraulic engineering (2nd edition). C683, CIRIA, London.
den Adel H, Bakker KJ, & Breteler MK (1988) Internal stability of minestone, SOWAS 88, publn. Balkema, Rotterdam
Kenney, T.C., Lau, D. (1985) Internal stability of granular filters. Canadian Geotech. Jo. Vol 22.
Muttray M.O. & Oumeraci H (2005) Theoretical and experimental study on wave damping inside a rubble mound breakwater, Coastal Engineering, vol 52, pp709-725, Elsevier
Wolters G, van Gent M, Allsop W, Hamm L, & Mühlestein D, (2009) HYDRALAB III: Guidelines for physical model testing of rubble mound breakwaters, Proc ICE Conf. on Coasts, Marine Structures & Breakwaters, Edinburgh, September 2009, publn. Thomas Telford, London.
Information & Authors
Information
Published In
Coastal Structures and Solutions to Coastal Disasters 2015: Resilient Coastal Communities
Pages: 763 - 773
Editors: Louise Wallendorf, U.S. Naval Academy and Daniel T. Cox, Ph.D., Oregon State University
ISBN (Online): 978-0-7844-8030-4
Copyright
© 2017 American Society of Civil Engineers.
History
Published online: Jul 11, 2017
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.