Author(s): Kouhei Oguma; Hiroshi Matsushita; Tomohiro Yasuda
Linked Author(s):
Keywords: Honeycomb-shape; Armour blocks; Block stability; Hydraulic model experiments
Abstract: Armour blocks are useful and effective as a countermeasure for protecting coastal structures such as composite breakwaters, coastal dikes, artificial reefs and so on. “HONEY-CALM” is a newly developed honeycomb shape armour block. High stability is expected so as to have five hexagonal large apertures to reduce uplift pressure. Economical efficiency is also expected so that reduces amount of concrete due to large porosity against an occupied area. This study conducted a series of hydraulic model experiments to assess the stability performance against wind waves and tsunamis of HONEY-CALM applied to various coastal structures. The experiments of wind waves were conducted on covering of composite breakwater mound, coastal dike slope and artificial reef. The experiments of tsunamis were conducted on covering of raised rubble-mound installed behind a caisson breakwater to evaluate the stability against tsunami flow. The experimental results show stability against waves and tsunamis. HONEY-CALM has significantly higher stability than the other flat-shape armour blocks.
Year: 2020