安定性（海岸・港湾施設）

[II-158] Hydraulic Model Test on Scour Protection around Offshore Wind Monopile Foundation using Filter Units

〇Satoshi Inagaki¹, Yuji Niihara¹, Nobuyuki Iwamae¹, Kazuki Suzuki¹ (1.Kajima Corporation)

Keywords:Offshore wind power generation, Monopile foundation, Scour protection, Filter Unit

As for the monopile foundation for offshore wind power generation, stone-based scour protection is most commonly used in Europe. A filter layer of crushed stone to prevent suction of sand ground is covered by an armor layer using large stones to prevent scattering of the filter layer. In Japan, it is difficult to obtain good quality stones especially for the armor layer, so we propose a scour protection using Filter Units (FU), the rock bags, for the armor layer. In this study, we confirmed the stability in high waves by hydraulic model tests with a moving bed. The scour protection using FU did not show any settlement and prevented scour around the foundation.