DESIGN AND VERIFICATION OF HIGH STABILITY WAVE DISSIPATING BLOCK

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The shape of blocks favorable for their stability against wave action was analyzed from the viewpoint of “space occupancy ratio in a cuboid” for existing blocks. A new high stability block was proposed in this study, which has the shape with three legs at both ends of the axis. Hydraulic experiments were conducted to examine the block stability. A stability number formula was determined from the experimental results. Required weight of the proposed high stability block against design waves is almost the same as a typical high stability block due to the effective interlocking between the blocks. Proposed high stability block is able to decrease the required number and contribute to the cost reduction since the porosity among the blocks becomes large.

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