Abstract
During the harbour extension works at Zeebrugge a new armour unit has been developed : the HARO. Tests in wave flume and wave tank showed a very good hydraulic stability, comparable to that of the dolos. Static and dynamic loading tests in the laboratory and pendulum tests on site confirm the HARO's excellent structural performance, comparable to that of the cube. Based on the results of exhaustive investigations one can state that the HARO is a safe and economical solution for the protection of maritime structures.
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