A.F. Willock, W.A. Price


Dolosse blocks were first described in 1966 by Merrifield and Zwamborn in a paper to the 10th Coastal Engineering Conference held in Tokyo. They reported a block whose design weight was one-fifth to one-sixth that of natural stone to resist the same wave height. The reaction of the profession was surprise and perhaps a little disbelief that the new block could have such a high K value. A considerable amount of testing followed in a number of hydraulic laboratories. Quite a lot of work was done at the Hydraulics Research Station at Wallingford and some interesting points came to light. The paper discusses how wave period and angle of attack affect block stability and suggests a way in which engineers might approach the problem of design of breakwaters.


armor block; slope protection; dolos

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