STABILITY OF INTERLOCKING ARMOUR UNITS ON A BREAKWATER CREST
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Keywords

Single layer armour
interlocking armour
low crested breakwater
crest armour
armour stability

How to Cite

van den Bosch, I., Ten Oever, E., Bakker, P., & Muttray, M. (2012). STABILITY OF INTERLOCKING ARMOUR UNITS ON A BREAKWATER CREST. Coastal Engineering Proceedings, 1(33), structures.11. https://doi.org/10.9753/icce.v33.structures.11

Abstract

The hydraulic stability of single layer, interlocking armour units on low crested and submerged breakwaters was investigated in 2D hydraulic model tests. Displacements of armour units and rocking were monitored and have been applied as indicators for the armour layer stability on the crest, front and rear slope. The effect of freeboard, packing density and wave steepness on the armour layer stability have been investigated. The stability of interlocking concrete armour units on low crested and submerged structures is qualitatively different from rock armour. About 40% to 50% larger armour units are required on the seaward slope and crest of low crested structures (as compared to conventional high crested breakwaters). About 35% larger armour units are required on the rear slope. Larger armour units are not required on submerged breakwaters if the water depth on the crest exceeds 50% of design wave height.
https://doi.org/10.9753/icce.v33.structures.11
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References

G. Burger, Stability of low-crested breakwaters. MSc Thesis, Delft University, Report H1878/H2415 (1995) and Final Proceedings MAST 2 Project, Rubble Mound Breakwater Failure Modes, Contract MAS2-CT92-0042m (1995).

CIRIA, CUR, CETMEF, The rock manual. The use of rock in hydraulic engineering (2nd edition). C683, CIRIA, London (2007).

DMC, Guidelines for Xbloc concept design. Delta Marine Consultants, Gouda, NL, (2011) http://www.xbloc.com.

M. Kramer, H.F. Burcharth, Stability of low-crested breakwaters in shallow water short crested waves. Proc. Coastal Structures 2003 Conference, Portland, Oregon, USA (2003).

P. van der Linde, Stability of single layer armour units on low-crested structures. MSc Thesis, Delft University (2010) pp. 287.

J.W. van der Meer, I.F.R. Daemen, Stability and wave transmission at low crested rubble mound structures. ASCE, J. of WPC & OE, New York, Vol. 120, No. 1 (1994), pp. 1-19.

M. Muttray, B. Reedijk, Design of concrete armour layers. Hansa, International Maritime Journal, Vol. 146, No. 6 (2009), pp. 111-118.

M. Muttray, E. ten Oever, B. Reedijk, Stability of low crested and submerged breakwaters with single layer armouring. Journal of Shipping and Ocean Engineering, Vol. 2, No. 3 (2012), pp. 140-152.

C. Vidal, M.A. Losada, E.P.D. Mansard, Stability of low-crested rubble-mound breakwater heads. Journal of Waterway, Port, Coastal and Ocean Engineering, Vol. 121, No. 2 (1995), pp. 114-122.http://dx.doi.org/10.1061/(ASCE)0733-950X(1995)121:2(114)

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