STABILITY COMPARISON OF 9 MODERN PLACED BLOCK REVETMENT TYPES FOR SLOPE PROTECTIONS

  • Mark Klein Breteler
  • Yvo Provoost
  • Paul van Steeg
  • Guido Wolters
  • Dorothea Kaste
  • Gijsbert Mourik

Abstract

Placed block revetments are constructed to withstand the wave forces on dikes, especially in regions where rip rap is not locally available, such as the Netherlands. The blocks are placed adjacent to each other on a filter layer to form a relatively closed and smooth surface, which is easy to walk on. Large-scale test in the Delta Flume of Deltares have been carried out to compare the stability of nine types of block revetments, presently on the market in the Netherlands (Klein Breteler, 2016). All tests have been performed with a comparable test setup and test program. The test program consisted of three series of tests. The first two series were short duration tests of 1000 waves with two different wave steepnesses, in which the wave height was increased step-by-step until damage occurred. The third test series was a long duration test lasting for 26 hours, or until damage occurred. The results of the tests have been used to quantify a correction factor in the calculation method. This correction factor, or stability factor, makes that the calculation method gives the same results as the Delta Flume tests, taking a safety margin into account. In this way the type-specific stability of each type of block revetment was better included in the calculation method.

References

Bezuijen, A, and M. Klein Breteler (1996); Design formulas for block revetments, Journal of Waterways, Port, Coastal and Ocean Engineering, November/December 1996

Hofland, B. and M. Klein Breteler (2005); Accuracy of Zsteen during wave impacts (in Dutch); Delft Hydraulics, report H4455, April 2005.

Klein Breteler, M. (2016); Comparison of block revetment stability; summary report (in Dutch); Deltares, report 1208618-006-HYE-0022, 7 July 2016

NEN7024 (Dutch standard), Elements for block revetments, general requirements, ICS 91100.30; 93.160, April 2015

Van Steeg, P., M. Klein Breteler, Y. Provoost (2016); Large-scale physical model tests to determine influence factor of roughness for wave run-up of channel shaped block revetments; Proceedings of the 6th International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science (Coastlab 2016), Ottawa

Published
2018-12-30
How to Cite
Breteler, M. K., Provoost, Y., van Steeg, P., Wolters, G., Kaste, D., & Mourik, G. (2018). STABILITY COMPARISON OF 9 MODERN PLACED BLOCK REVETMENT TYPES FOR SLOPE PROTECTIONS. Coastal Engineering Proceedings, 1(36), papers.75. https://doi.org/10.9753/icce.v36.papers.75